28 May
2014
28 May
'14
4:58 p.m.
Folks,
I'm testing kind of scalability of XWiki by simple benchmark which
creates N pages in a loop (one page at a time, it's not parallel run!)
and then when this loop finishes, it again in another loop gets all the
pages from the server (again serially, one page at the time). For page
creation we're using REST API, for getting the pages we're using common
browseable URL (/xwiki/bin/view/...).
Now the problem is that if I try to attempt creation of 100k pages, then
I hit Java's out of memory errors and server is unresponsive from that
time. I've tested this on:
- xwiki-jetty-hsql-6.0.0
- xwiki-jetty-hsql-6.0.1
- xwiki-tomcat7-pgsql -- debian xwiki packages running on top of debian 7.5
Of course I know the way how to increase Java's memory space/heap space.
The problem is that this will not help here. Simply if I do so and then
create 100 millions of pages on one run I will still get to the same
issue just it'll take a lot longer.
I've googled a bit for memoryleaks issues on Java and found an
interesting recommendation to use parallel GC. So I've changed
start_xwiki.sh to include -XX:+UseParallelGC in XWIKI_OPTS
Anyway, the situation is still looking suspiciously. I've connected
JConsole to the xwiki java process and overall view looks:
https://app.box.com/s/udndu96pl2fvuz3igvor
this is whole run overview, but perhaps even more clear is it on last 2
hours view which is here:
https://app.box.com/s/deuix33fzejra4uur941
Sidenote this all is from debugging xwiki-jetty-hsql-6.0.1 distro.
Now, what worries me a lot is this bottom cap which is growing. You can
see that clearly in Heap Memory Usage from 15:15. In CPU usage you can
also see that around the same time the CPU consumption went up from ~15%
to ~45%
When I switch to Memory Tab in JConsole and click several times on
"Perform GC" button, the bottom cap is still there and I cannot get
lower in memory usage. With this going on I can also see server failing
after some time on OOM error.
Any help with this is highly appreciated here.
Thanks!
Karel
28 May
28 May
5:27 p.m.
You are mixing several things here. It's not because you hit Out of
memory errors that you have a memory leak, it can simply mean that you
have a document cache too big for the memory you allocated for
example. You can modify the documents cache size in xwiki.cfg.
How much memory did you allocated ? XWiki is not a small beast and it
require a minimum to work. See
http://platform.xwiki.org/xwiki/bin/view/AdminGuide/Performances#HMemory.
On Wed, May 28, 2014 at 4:58 PM, Karel Gardas <karel.gardas(a)centrum.cz> wrote:
Folks,
I'm testing kind of scalability of XWiki by simple benchmark which creates N
pages in a loop (one page at a time, it's not parallel run!) and then when
this loop finishes, it again in another loop gets all the pages from the
server (again serially, one page at the time). For page creation we're using
REST API, for getting the pages we're using common browseable URL
(/xwiki/bin/view/...).
Now the problem is that if I try to attempt creation of 100k pages, then I
hit Java's out of memory errors and server is unresponsive from that time.
I've tested this on:
- xwiki-jetty-hsql-6.0.0
- xwiki-jetty-hsql-6.0.1
- xwiki-tomcat7-pgsql -- debian xwiki packages running on top of debian 7.5
Of course I know the way how to increase Java's memory space/heap space. The
problem is that this will not help here. Simply if I do so and then create
100 millions of pages on one run I will still get to the same issue just
it'll take a lot longer.
I've googled a bit for memoryleaks issues on Java and found an interesting
recommendation to use parallel GC. So I've changed start_xwiki.sh to include
-XX:+UseParallelGC in XWIKI_OPTS
Anyway, the situation is still looking suspiciously. I've connected JConsole
to the xwiki java process and overall view looks:
https://app.box.com/s/udndu96pl2fvuz3igvor
this is whole run overview, but perhaps even more clear is it on last 2
hours view which is here:
https://app.box.com/s/deuix33fzejra4uur941
Sidenote this all is from debugging xwiki-jetty-hsql-6.0.1 distro.
Now, what worries me a lot is this bottom cap which is growing. You can see
that clearly in Heap Memory Usage from 15:15. In CPU usage you can also see
that around the same time the CPU consumption went up from ~15% to ~45%
When I switch to Memory Tab in JConsole and click several times on "Perform
GC" button, the bottom cap is still there and I cannot get lower in memory
usage. With this going on I can also see server failing after some time on
OOM error.
Any help with this is highly appreciated here.
Thanks!
Karel
_______________________________________________
devs mailing list
devs(a)xwiki.org
http://lists.xwiki.org/mailman/listinfo/devs
--
Thomas Mortagne
6:02 p.m.
Thomas,
thanks for your fast response. My comments are below.
On 05/28/14 05:27 PM, Thomas Mortagne wrote:
You are mixing several things here. It's not
because you hit Out of
memory errors that you have a memory leak, it can simply mean that you
have a document cache too big for the memory you allocated for
example. You can modify the documents cache size in xwiki.cfg.
I see two caches in that file:
xwiki.store.cache
xwiki.render.cache
both seems to be commented out.
How much memory did you allocated ? XWiki is not a
small beast and it
require a minimum to work. See
http://platform.xwiki.org/xwiki/bin/view/AdminGuide/Performances#HMemory.
To prevent misunderstanding. I've not set any limit on memory etc. I
just simply use xwiki-enterprise-jetty-hsqldb-6.0.1.zip as distributed
on xwiki.org. This distro does have 512MB RAM cap which following your
link above should be good for medium installs.
The question is, if the value of caches above are commented out in
xwiki.cfg, then what are actual default values which are used in the
xwiki-enterprise-jetty-hsqldb-6.0.1.zip distro? Just to know from which
value I shall go lower...
Thanks!
Karel
On Wed, May 28, 2014 at 4:58 PM, Karel Gardas<karel.gardas(a)centrum.cz> wrote:
Folks,
I'm testing kind of scalability of XWiki by simple benchmark which creates N
pages in a loop (one page at a time, it's not parallel run!) and then when
this loop finishes, it again in another loop gets all the pages from the
server (again serially, one page at the time). For page creation we're using
REST API, for getting the pages we're using common browseable URL
(/xwiki/bin/view/...).
Now the problem is that if I try to attempt creation of 100k pages, then I
hit Java's out of memory errors and server is unresponsive from that time.
I've tested this on:
- xwiki-jetty-hsql-6.0.0
- xwiki-jetty-hsql-6.0.1
- xwiki-tomcat7-pgsql -- debian xwiki packages running on top of debian 7.5
Of course I know the way how to increase Java's memory space/heap space. The
problem is that this will not help here. Simply if I do so and then create
100 millions of pages on one run I will still get to the same issue just
it'll take a lot longer.
I've googled a bit for memoryleaks issues on Java and found an interesting
recommendation to use parallel GC. So I've changed start_xwiki.sh to include
-XX:+UseParallelGC in XWIKI_OPTS
Anyway, the situation is still looking suspiciously. I've connected JConsole
to the xwiki java process and overall view looks:
https://app.box.com/s/udndu96pl2fvuz3igvor
this is whole run overview, but perhaps even more clear is it on last 2
hours view which is here:
https://app.box.com/s/deuix33fzejra4uur941
Sidenote this all is from debugging xwiki-jetty-hsql-6.0.1 distro.
Now, what worries me a lot is this bottom cap which is growing. You can see
that clearly in Heap Memory Usage from 15:15. In CPU usage you can also see
that around the same time the CPU consumption went up from ~15% to ~45%
When I switch to Memory Tab in JConsole and click several times on "Perform
GC" button, the bottom cap is still there and I cannot get lower in memory
usage. With this going on I can also see server failing after some time on
OOM error.
Any help with this is highly appreciated here.
Thanks!
Karel
_______________________________________________
devs mailing list
devs(a)xwiki.org
http://lists.xwiki.org/mailman/listinfo/devs
6:26 p.m.
The standalone .zip package is not designed to hold many pages. It uses
an in-memory database that requires as much heap space as the amount of
data that you have (plus all the other memory that XWiki normally
requires). I thought there was a bigger warning on the download page
that clarified that the standalone package is only supposed to be used
for small tests...
The pgsql package should behave better, though, since it separates the
database from the live objects, except that you need to make sure
Tomcat's default memory is increased.
On 05/28/2014 12:02 PM, Karel Gardas wrote:
Thomas,
thanks for your fast response. My comments are below.
On 05/28/14 05:27 PM, Thomas Mortagne wrote:
--
Sergiu Dumitriu
http://purl.org/net/sergiu
You are mixing several things here. It's not
because you hit Out of
memory errors that you have a memory leak, it can simply mean that you
have a document cache too big for the memory you allocated for
example. You can modify the documents cache size in xwiki.cfg.
I see two caches in that file:
xwiki.store.cache
xwiki.render.cache
both seems to be commented out.
How much memory did you allocated ? XWiki is not
a small beast and it
require a minimum to work. See
http://platform.xwiki.org/xwiki/bin/view/AdminGuide/Performances#HMemory.
To prevent misunderstanding. I've not set any limit on memory etc. I
just simply use xwiki-enterprise-jetty-hsqldb-6.0.1.zip as distributed
on xwiki.org. This distro does have 512MB RAM cap which following your
link above should be good for medium installs.
The question is, if the value of caches above are commented out in
xwiki.cfg, then what are actual default values which are used in the
xwiki-enterprise-jetty-hsqldb-6.0.1.zip distro? Just to know from which
value I shall go lower...
Thanks!
Karel
>
> On Wed, May 28, 2014 at 4:58 PM, Karel
> Gardas<karel.gardas(a)centrum.cz> wrote:
>>
>> Folks,
>>
>> I'm testing kind of scalability of XWiki by simple benchmark which
>> creates N
>> pages in a loop (one page at a time, it's not parallel run!) and then
>> when
>> this loop finishes, it again in another loop gets all the pages from the
>> server (again serially, one page at the time). For page creation
>> we're using
>> REST API, for getting the pages we're using common browseable URL
>> (/xwiki/bin/view/...).
>> Now the problem is that if I try to attempt creation of 100k pages,
>> then I
>> hit Java's out of memory errors and server is unresponsive from that
>> time.
>> I've tested this on:
>>
>> - xwiki-jetty-hsql-6.0.0
>> - xwiki-jetty-hsql-6.0.1
>> - xwiki-tomcat7-pgsql -- debian xwiki packages running on top of
>> debian 7.5
>>
>> Of course I know the way how to increase Java's memory space/heap
>> space. The
>> problem is that this will not help here. Simply if I do so and then
>> create
>> 100 millions of pages on one run I will still get to the same issue just
>> it'll take a lot longer.
>>
>> I've googled a bit for memoryleaks issues on Java and found an
>> interesting
>> recommendation to use parallel GC. So I've changed start_xwiki.sh to
>> include
>> -XX:+UseParallelGC in XWIKI_OPTS
>>
>> Anyway, the situation is still looking suspiciously. I've connected
>> JConsole
>> to the xwiki java process and overall view looks:
>>
>> https://app.box.com/s/udndu96pl2fvuz3igvor
>>
>> this is whole run overview, but perhaps even more clear is it on last 2
>> hours view which is here:
>>
>> https://app.box.com/s/deuix33fzejra4uur941
>>
>> Sidenote this all is from debugging xwiki-jetty-hsql-6.0.1 distro.
>>
>> Now, what worries me a lot is this bottom cap which is growing. You
>> can see
>> that clearly in Heap Memory Usage from 15:15. In CPU usage you can
>> also see
>> that around the same time the CPU consumption went up from ~15% to ~45%
>>
>> When I switch to Memory Tab in JConsole and click several times on
>> "Perform
>> GC" button, the bottom cap is still there and I cannot get lower in
>> memory
>> usage. With this going on I can also see server failing after some
>> time on
>> OOM error.
>>
>> Any help with this is highly appreciated here.
>>
>> Thanks!
>> Karel
29 May
29 May
7:54 p.m.
On 05/28/14 06:26 PM, Sergiu Dumitriu wrote:
The standalone .zip package is not designed to hold
many pages. It uses
an in-memory database that requires as much heap space as the amount of
data that you have (plus all the other memory that XWiki normally
requires). I thought there was a bigger warning on the download page
that clarified that the standalone package is only supposed to be used
for small tests...
Unfortunately I've not been able to judge what's for small test and
what's for bigger deployment based on the description provided on the
download page here:
http://enterprise.xwiki.org/xwiki/bin/view/Main/Download -- it just
divides various installers based on user maturity to work with xwiki.
Tells nothing about scalability at all.
The pgsql package should behave better, though, since
it separates the
database from the live objects, except that you need to make sure
Tomcat's default memory is increased.
Indeed, I've installed tomcat/pgsql/xwiki 6.0.1, then I've used exactly
xwiki.org's catalina opts. With this I've been able to create and get
those 100k of clear/empty pages I'm testing here, but I still get OOM
errors. I've tested twice and twice it hits RMI connection to JConsole
so basically JConsole disconnects with this message thrown to the
separate window:
ay 29, 2014 5:02:20 AM ClientCommunicatorAdmin Checker-run
WARNING: Failed to check the connection:
java.net.SocketTimeoutException: Read timed out
May 29, 2014 5:03:17 AM ClientNotifForwarder NotifFetcher-run
SEVERE: Failed to fetch notification, stopping thread. Error is:
java.rmi.UnmarshalException: error unmarshalling return; nested
exception is:
java.io.EOFException
java.rmi.UnmarshalException: error unmarshalling return; nested
exception is:
java.io.EOFException
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:191)
at com.sun.jmx.remote.internal.PRef.invoke(Unknown Source)
at
javax.management.remote.rmi.RMIConnectionImpl_Stub.fetchNotifications(Unknown
Source)
at
javax.management.remote.rmi.RMIConnector$RMINotifClient.fetchNotifs(RMIConnector.java:1337)
at
com.sun.jmx.remote.internal.ClientNotifForwarder$NotifFetcher.fetchNotifs(ClientNotifForwarder.java:587)
at
com.sun.jmx.remote.internal.ClientNotifForwarder$NotifFetcher.doRun(ClientNotifForwarder.java:470)
at
com.sun.jmx.remote.internal.ClientNotifForwarder$NotifFetcher.run(ClientNotifForwarder.java:451)
at
com.sun.jmx.remote.internal.ClientNotifForwarder$LinearExecutor$1.run(ClientNotifForwarder.java:107)
Caused by: java.io.EOFException
at
java.io.ObjectInputStream$BlockDataInputStream.peekByte(ObjectInputStream.java:2571)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1315)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
at sun.rmi.server.UnicastRef.unmarshalValue(UnicastRef.java:324)
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:173)
... 7 more
May 29, 2014 6:04:09 PM ClientCommunicatorAdmin Checker-run
WARNING: Failed to check the connection:
java.net.SocketTimeoutException: Read timed out
and on the tomcat console I see messages like:
Exception in thread "RMI TCP Connection(idle)"
java.lang.OutOfMemoryError: Java heap space
Exception in thread "RMI TCP Connection(idle)"
java.lang.OutOfMemoryError: Java heap space
Exception in thread "RMI TCP Connection(idle)"
java.lang.OutOfMemoryError: Java heap space
Exception in thread "RMI TCP Connection(idle)"
java.lang.OutOfMemoryError: Java heap space
Exception in thread "RMI TCP Connection(idle)"
java.lang.OutOfMemoryError: Java heap space
Exception in thread "RMI TCP Connection(idle)"
java.lang.OutOfMemoryError: Java heap space
Exception in thread "RMI TCP Connection(idle)"
java.lang.OutOfMemoryError: Java heap space
Exception in thread "RMI TCP Connection(idle)"
java.lang.OutOfMemoryError: Java heap space
Exception in thread "RMI TCP Connection(idle)"
java.lang.OutOfMemoryError: Java heap space
Still my test runs, but honestly speaking the stage of server itself is
not the most trusted one. I even uncommented *cache* lines in xwiki.cfg
and left default values there, but this does help neither.
As I said, this is when running with: CATALINA_OPTS="-server -Xms800m
-Xmx800m -XX:MaxPermSize=196m -Dfile.encoding=utf-8
-Djava.awt.headless=true -XX:+UseParallelGC -XX:MaxGCPauseMillis=100"
Thanks!
Karel
On 05/28/2014 12:02 PM, Karel Gardas wrote:
Thomas,
thanks for your fast response. My comments are below.
On 05/28/14 05:27 PM, Thomas Mortagne wrote:
You are mixing several things here. It's not
because you hit Out of
memory errors that you have a memory leak, it can simply mean that you
have a document cache too big for the memory you allocated for
example. You can modify the documents cache size in xwiki.cfg.
I see two caches in that file:
xwiki.store.cache
xwiki.render.cache
both seems to be commented out.
How much memory did you allocated ? XWiki is not
a small beast and it
require a minimum to work. See
http://platform.xwiki.org/xwiki/bin/view/AdminGuide/Performances#HMemory.
To prevent misunderstanding. I've not set any limit on memory etc. I
just simply use xwiki-enterprise-jetty-hsqldb-6.0.1.zip as distributed
on xwiki.org. This distro does have 512MB RAM cap which following your
link above should be good for medium installs.
The question is, if the value of caches above are commented out in
xwiki.cfg, then what are actual default values which are used in the
xwiki-enterprise-jetty-hsqldb-6.0.1.zip distro? Just to know from which
value I shall go lower...
Thanks!
Karel
>
> On Wed, May 28, 2014 at 4:58 PM, Karel
> Gardas<karel.gardas(a)centrum.cz> wrote:
>>
>> Folks,
>>
>> I'm testing kind of scalability of XWiki by simple benchmark which
>> creates N
>> pages in a loop (one page at a time, it's not parallel run!) and then
>> when
>> this loop finishes, it again in another loop gets all the pages from the
>> server (again serially, one page at the time). For page creation
>> we're using
>> REST API, for getting the pages we're using common browseable URL
>> (/xwiki/bin/view/...).
>> Now the problem is that if I try to attempt creation of 100k pages,
>> then I
>> hit Java's out of memory errors and server is unresponsive from that
>> time.
>> I've tested this on:
>>
>> - xwiki-jetty-hsql-6.0.0
>> - xwiki-jetty-hsql-6.0.1
>> - xwiki-tomcat7-pgsql -- debian xwiki packages running on top of
>> debian 7.5
>>
>> Of course I know the way how to increase Java's memory space/heap
>> space. The
>> problem is that this will not help here. Simply if I do so and then
>> create
>> 100 millions of pages on one run I will still get to the same issue just
>> it'll take a lot longer.
>>
>> I've googled a bit for memoryleaks issues on Java and found an
>> interesting
>> recommendation to use parallel GC. So I've changed start_xwiki.sh to
>> include
>> -XX:+UseParallelGC in XWIKI_OPTS
>>
>> Anyway, the situation is still looking suspiciously. I've connected
>> JConsole
>> to the xwiki java process and overall view looks:
>>
>> https://app.box.com/s/udndu96pl2fvuz3igvor
>>
>> this is whole run overview, but perhaps even more clear is it on last 2
>> hours view which is here:
>>
>> https://app.box.com/s/deuix33fzejra4uur941
>>
>> Sidenote this all is from debugging xwiki-jetty-hsql-6.0.1 distro.
>>
>> Now, what worries me a lot is this bottom cap which is growing. You
>> can see
>> that clearly in Heap Memory Usage from 15:15. In CPU usage you can
>> also see
>> that around the same time the CPU consumption went up from ~15% to ~45%
>>
>> When I switch to Memory Tab in JConsole and click several times on
>> "Perform
>> GC" button, the bottom cap is still there and I cannot get lower in
>> memory
>> usage. With this going on I can also see server failing after some
>> time on
>> OOM error.
>>
>> Any help with this is highly appreciated here.
>>
>> Thanks!
>> Karel
28 May
28 May
6:30 p.m.
On Wed, May 28, 2014 at 6:02 PM, Karel Gardas <karel.gardas(a)centrum.cz> wrote:
Thomas,
thanks for your fast response. My comments are below.
On 05/28/14 05:27 PM, Thomas Mortagne wrote:
Ok that explains it, this distribution is more for tests purpose and
the entire database is in memory so indeed the more pages you add the
more memory you take.
You are mixing several things here. It's not because you hit Out of
memory errors that you have a memory leak, it can simply mean that you
have a document cache too big for the memory you allocated for
example. You can modify the documents cache size in xwiki.cfg.
I see two caches in that file:
xwiki.store.cache
xwiki.render.cache
both seems to be commented out.
How much memory did you allocated ? XWiki is not
a small beast and it
require a minimum to work. See
http://platform.xwiki.org/xwiki/bin/view/AdminGuide/Performances#HMemory.
To prevent misunderstanding. I've not set any limit on memory etc. I just
simply use xwiki-enterprise-jetty-hsqldb-6.0.1.zip as distributed on
xwiki.org. This distro does have 512MB RAM cap which following your link
above should be good for medium installs.
The question is, if the value of caches above are commented out in
xwiki.cfg, then what are actual default values which are used in the
xwiki-enterprise-jetty-hsqldb-6.0.1.zip distro? Just to know from which
value I shall go lower...
Thanks!
Karel
--
Thomas Mortagne
On Wed, May 28, 2014 at 4:58 PM, Karel Gardas<karel.gardas(a)centrum.cz>
wrote:
_______________________________________________
devs mailing list
devs(a)xwiki.org
http://lists.xwiki.org/mailman/listinfo/devs
Folks,
I'm testing kind of scalability of XWiki by simple benchmark which
creates N
pages in a loop (one page at a time, it's not parallel run!) and then
when
this loop finishes, it again in another loop gets all the pages from the
server (again serially, one page at the time). For page creation we're
using
REST API, for getting the pages we're using common browseable URL
(/xwiki/bin/view/...).
Now the problem is that if I try to attempt creation of 100k pages, then
I
hit Java's out of memory errors and server is unresponsive from that
time.
I've tested this on:
- xwiki-jetty-hsql-6.0.0
- xwiki-jetty-hsql-6.0.1
- xwiki-tomcat7-pgsql -- debian xwiki packages running on top of debian
7.5
Of course I know the way how to increase Java's memory space/heap space.
The
problem is that this will not help here. Simply if I do so and then
create
100 millions of pages on one run I will still get to the same issue just
it'll take a lot longer.
I've googled a bit for memoryleaks issues on Java and found an
interesting
recommendation to use parallel GC. So I've changed start_xwiki.sh to
include
-XX:+UseParallelGC in XWIKI_OPTS
Anyway, the situation is still looking suspiciously. I've connected
JConsole
to the xwiki java process and overall view looks:
https://app.box.com/s/udndu96pl2fvuz3igvor
this is whole run overview, but perhaps even more clear is it on last 2
hours view which is here:
https://app.box.com/s/deuix33fzejra4uur941
Sidenote this all is from debugging xwiki-jetty-hsql-6.0.1 distro.
Now, what worries me a lot is this bottom cap which is growing. You can
see
that clearly in Heap Memory Usage from 15:15. In CPU usage you can also
see
that around the same time the CPU consumption went up from ~15% to ~45%
When I switch to Memory Tab in JConsole and click several times on
"Perform
GC" button, the bottom cap is still there and I cannot get lower in
memory
usage. With this going on I can also see server failing after some time
on
OOM error.
Any help with this is highly appreciated here.
Thanks!
Karel
_______________________________________________
devs mailing list
devs(a)xwiki.org
http://lists.xwiki.org/mailman/listinfo/devs
29 May
29 May
7:55 p.m.
On 05/28/14 06:30 PM, Thomas Mortagne wrote:
This indeed clears that. Unfortunately even with tomcat/pgsql combo +
xwiki.org's CATALINA_OPTS I still get OOM errors, this time in RMI for
JConsole connection...
Thanks,
Karel
To prevent
misunderstanding. I've not set any limit on memory etc. I just
simply use xwiki-enterprise-jetty-hsqldb-6.0.1.zip as distributed on
xwiki.org. This distro does have 512MB RAM cap which following your link
above should be good for medium installs.
Ok that explains it, this distribution is more for tests purpose and
the entire database is in memory so indeed the more pages you add the
more memory you take. 
28 May
28 May
8:11 p.m.
> Of course I know the way how to increase
Java's memory space/heap space. The
> problem is that this will not help here. Simply if I do so and then create
> 100 millions of pages on one run I will still get to the same issue just
> it'll take a lot longer.
You won't reach 100 time the memory taken by downloading a 100 million pages after you
download a million pages. The caches have limits and you should measure how much memory in
your setting is needed to reach that limit. Tests such as yours, after they reach the max,
will get slower because of the DB access following the cache eviction; they are not very
realistic under that point of view.
The best way to follow this is to use JMX and get a graph of the cache values, you should
see maximum be reached after a while.
At curriki, we have adjusted the caches to be a bit bigger and we do reach the maximum
(100'000 if I remember well, for the document cache) after about an hour after the
restart. Then things get pretty stable with our max 8G of memory.
We are considering to raise all that since hardware has about 32G but that'll be for
later.
Our app servers (Sun Java App Server or Tomcat) can stay up for several months.
Reporting on this simulation to the list is certainly interesting.
We've started an amount of monitoring in production using Zabbix but we have not yet
had the time find the "keys" that would access the JMX cache sizes using Zabbix
which has its own language to describe JMX bean properties. Certainly something worth
sharing.
In your simulation case, jConsole is probably enough.
Paul
30 May
30 May
8:12 p.m.
Paul,
On 05/28/14 08:11 PM, Paul Libbrecht wrote:
yes, I'm sure the test is not that realistic so far since majority of
xwiki usecases is probably download/rendering of page than upload of
page which I'm testing now. The reason of my test is simple, my task is
to attempt importing whole Wikipedia content w/o history into the XWiki.
For this I need to have it stable for import which is something I do
have problem now.
> Of course
I know the way how to increase Java's memory space/heap
> space. The problem is that this will not help here. Simply if I
> do so and then create 100 millions of pages on one run I will
> still get to the same issue just it'll take a lot longer.
You won't reach 100 time the memory taken by downloading a 100
million pages after you download a million pages. The caches have
limits and you should measure how much memory in your setting is
needed to reach that limit. Tests such as yours, after they reach the
max, will get slower because of the DB access following the cache
eviction; they are not very realistic under that point of view. The best way to follow this is to use JMX and get a
graph of the
cache values, you should see maximum be reached after a while. At
curriki, we have adjusted the caches to be a bit bigger and we do
reach the maximum (100'000 if I remember well, for the document
cache) after about an hour after the restart. Then things get pretty
stable with our max 8G of memory.
I'm glad that your setup is stable. I do have following cache setup here:
$ grep cache `find . -name 'xwiki.cfg'`
#-# Put a cache in front of the document store. This greatly improves
performance at the cost of memory consumption.
xwiki.store.cache=1
#-# Maximum number of documents to keep in the cache.
xwiki.store.cache.capacity=100
#-# Maximum number of documents to keep in the rendered cache
xwiki.render.cache.capacity=100
# xwiki.authentication.ldap.groupcache_expiration=21600
xwiki.plugin.image.cache.capacity=30
this is XWiki 6.0.1 on top of Tomcat 7.0.53 using PostgreSQL 9.3/64bit.
The JVM is 1.7.0_07 everything running on Solaris 11.1. When I give 2GB
RAM to catalina by:
$ cat bin/setenv.sh
CATALINA_OPTS="-server -Xms2048m -Xmx2048m -XX:MaxPermSize=196m
-Dfile.encoding=utf-8 -Djava.awt.headless=true -XX:+UseParallelGC
-XX:MaxGCPauseMillis=100"
export CATALINA_OPTS
and then run my benchmark which is just using REST to import following
simple page:
"<?xml version=\"1.0\" encoding=\"UTF-8\"
standalone=\"yes\"?>"
++ "<page xmlns=\"http://www.xwiki.org\">"
++ "<title>Semantic XWiki Benchmark page " ++ title ++
"</title>"
++ "<syntax>xwiki/2.0</syntax>"
++ "<content>This is a benchark page."
++ "The list of properties defined for this page is:"
++ "</content>"
++ "</page>"
where title is BenchPage_<number>
Now, when I pushed that, then after around 400k pages imported I hit OOM
error. JConsole is thrown out by closed connection and even benchmark
tool complains about few 500 HTTP error codes received. The exception
output on Tomcat's console looks:
Exception in thread "DefaultQuartzScheduler_QuartzSchedulerThread"
java.lang.OutOfMemoryError: Java heap space
Exception in thread "RMI TCP Connection(idle)" Exception in thread "RMI
TCP Connection(idle)" java.lang.OutOfMemoryError: Java heap space
java.lang.OutOfMemoryError: Java heap space
Exception in thread
"TxCleanupService,platform.security.authorization.cache,local"
java.lang.OutOfMemoryError: Java heap space
Exception in thread
"TxCleanupService,localization.bundle.document,local" Exception in
thread "TxCleanupService,wiki.descriptor.cache.wikiId,local"
java.lang.OutOfMemoryError: Java heap space
java.lang.OutOfMemoryError: Java heap space
Exception in thread "TxCleanupService,xwiki.store.pageexistcache,local"
java.lang.OutOfMemoryError: Java heap space
Exception in thread "TxCleanupService,xwiki.store.pagecache,local"
java.lang.OutOfMemoryError: Java heap space
May 30, 2014 4:12:18 PM org.restlet.engine.application.StatusFilter doHandle
WARNING: Exception or error caught in status service
java.lang.OutOfMemoryError: Java heap space
May 30, 2014 4:12:18 PM org.restlet.engine.application.StatusFilter doHandle
WARNING: Exception or error caught in status service
java.lang.OutOfMemoryError: Java heap space
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2442)
at java.lang.Class.getMethod0(Class.java:2685)
at java.lang.Class.getMethod(Class.java:1620)
at
org.xwiki.legacy.internal.oldcore.notification.LegacyNotificationDispatcher.getNotificationManager(LegacyNotificationDispatcher.java:94)
at
org.xwiki.legacy.internal.oldcore.notification.LegacyNotificationDispatcher.onEvent(LegacyNotificationDispatcher.java:109)
at
org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:299)
at
org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:264)
at com.xpn.xwiki.XWiki.saveDocument(XWiki.java:1323)
at com.xpn.xwiki.api.Document.saveDocument(Document.java:2299)
at com.xpn.xwiki.api.Document.save(Document.java:2202)
at com.xpn.xwiki.api.Document.save(Document.java:2196)
at
org.xwiki.rest.internal.resources.pages.ModifiablePageResource.putPage(ModifiablePageResource.java:67)
at
org.xwiki.rest.internal.resources.pages.PageResourceImpl.putPage(PageResourceImpl.java:62)
at sun.reflect.GeneratedMethodAccessor296.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at
org.restlet.ext.jaxrs.internal.wrappers.AbstractMethodWrapper.internalInvoke(AbstractMethodWrapper.java:171)
at
org.restlet.ext.jaxrs.internal.wrappers.ResourceMethod.invoke(ResourceMethod.java:291)
at
org.restlet.ext.jaxrs.JaxRsRestlet.invokeMethod(JaxRsRestlet.java:1043)
at org.restlet.ext.jaxrs.JaxRsRestlet.handle(JaxRsRestlet.java:792)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Router.doHandle(Router.java:500)
at org.restlet.routing.Router.handle(Router.java:740)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
May 30, 2014 4:12:18 PM org.restlet.engine.application.StatusFilter doHandle
WARNING: Exception or error caught in status service
java.lang.OutOfMemoryError: Java heap space
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2442)
at java.lang.Class.getMethod0(Class.java:2685)
at java.lang.Class.getMethod(Class.java:1620)
at
org.xwiki.legacy.internal.oldcore.notification.LegacyNotificationDispatcher.getNotificationManager(LegacyNotificationDispatcher.java:94)
at
org.xwiki.legacy.internal.oldcore.notification.LegacyNotificationDispatcher.onEvent(LegacyNotificationDispatcher.java:109)
at
org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:299)
at
org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:264)
at com.xpn.xwiki.XWiki.saveDocument(XWiki.java:1323)
at com.xpn.xwiki.api.Document.saveDocument(Document.java:2299)
at com.xpn.xwiki.api.Document.save(Document.java:2202)
at com.xpn.xwiki.api.Document.save(Document.java:2196)
at
org.xwiki.rest.internal.resources.pages.ModifiablePageResource.putPage(ModifiablePageResource.java:67)
at
org.xwiki.rest.internal.resources.pages.PageResourceImpl.putPage(PageResourceImpl.java:62)
at sun.reflect.GeneratedMethodAccessor296.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at
org.restlet.ext.jaxrs.internal.wrappers.AbstractMethodWrapper.internalInvoke(AbstractMethodWrapper.java:171)
at
org.restlet.ext.jaxrs.internal.wrappers.ResourceMethod.invoke(ResourceMethod.java:291)
at
org.restlet.ext.jaxrs.JaxRsRestlet.invokeMethod(JaxRsRestlet.java:1043)
at org.restlet.ext.jaxrs.JaxRsRestlet.handle(JaxRsRestlet.java:792)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Router.doHandle(Router.java:500)
at org.restlet.routing.Router.handle(Router.java:740)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
May 30, 2014 4:12:18 PM org.restlet.engine.application.StatusFilter doHandle
WARNING: Exception or error caught in status service
java.lang.OutOfMemoryError: Java heap space
2014-05-30 16:12:18,851 [DefaultQuartzScheduler_Worker-7] ERROR
o.q.c.JobRunShell - Job
DEFAULT.xwiki:Scheduler.WatchListHourlyNotifier_0 threw an unhandled
Exception:
java.lang.OutOfMemoryError: Java heap space
2014-05-30 16:12:18,856 [XWiki Solr index thread] WARN
o.h.u.JDBCExceptionReporter - SQL Error: 0, SQLState: 08001
2014-05-30 16:12:18,856 [XWiki Solr index thread] ERROR
o.h.u.JDBCExceptionReporter - The connection attempt failed.
2014-05-30 16:12:18,858 [DefaultQuartzScheduler_Worker-7] ERROR
o.q.c.ErrorLogger - Job
(DEFAULT.xwiki:Scheduler.WatchListHourlyNotifier_0 threw an exception.
org.quartz.SchedulerException: Job threw an unhandled exception.
at org.quartz.core.JobRunShell.run(JobRunShell.java:213)
~[quartz-1.6.5.jar:1.6.5]
at
org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:525)
[quartz-1.6.5.jar:1.6.5]
Caused by: java.lang.OutOfMemoryError: Java heap space
2014-05-30 16:12:18,859 [DefaultQuartzScheduler_Worker-7] ERROR
c.x.x.p.s.StatusListener - Job
(DEFAULT.xwiki:Scheduler.WatchListHourlyNotifier_0 threw an exception.
org.quartz.SchedulerException: Job threw an unhandled exception.
at org.quartz.core.JobRunShell.run(JobRunShell.java:213)
~[quartz-1.6.5.jar:1.6.5]
at
org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:525)
[quartz-1.6.5.jar:1.6.5]
Caused by: java.lang.OutOfMemoryError: Java heap space
Funny thing is that before the error JConsole does not show any signs
that the server was allocating a lot of memory. Probably this should be
quick spike in mem consumption or otherwise I don't understand at all
why this happen.
Now, the question is: I do have or I think I do have very limited cache
setup here. I've increase RAM side to 2GB which is over the recommended
size by xwiki.org itself -- they warn about size bigger than 1GB due to
slowness of GC then. Anyway, 2GB, limited size of cache and yet I hit
OOM. Do you think I shall increase RAM limit even further?
Thanks!
Karel
8:31 p.m.
The references to the watclist in your log make me think about
something: go to you XWiki user profile, disable "Automatic document
watching" in Watchlist section and try again.
By default evey time a user create a page it's added to his watchlist
and I'm wondering if your OOM here is watchlist trying to generate a
mail about what happen in the past hour which would certainly generate
a huge mail for 400k documents.
On Fri, May 30, 2014 at 8:12 PM, Karel Gardas <karel.gardas(a)centrum.cz> wrote:
Paul,
On 05/28/14 08:11 PM, Paul Libbrecht wrote:
yes, I'm sure the test is not that realistic so far since majority of xwiki
usecases is probably download/rendering of page than upload of page which
I'm testing now. The reason of my test is simple, my task is to attempt
importing whole Wikipedia content w/o history into the XWiki. For this I
need to have it stable for import which is something I do have problem now.
--
Thomas Mortagne
>
> Of course I know the way how to increase Java's memory space/heap
> space. The problem is that this will not help here. Simply if I
> do so and then create 100 millions of pages on one run I will
> still get to the same issue just it'll take a lot longer.
You won't reach 100 time the memory taken by downloading a 100
million pages after you download a million pages. The caches have
limits and you should measure how much memory in your setting is
needed to reach that limit. Tests such as yours, after they reach the
max, will get slower because of the DB access following the cache
eviction; they are not very realistic under that point of view. The best way to follow this is to use JMX and get
a graph of the
cache values, you should see maximum be reached after a while. At
curriki, we have adjusted the caches to be a bit bigger and we do
reach the maximum (100'000 if I remember well, for the document
cache) after about an hour after the restart. Then things get pretty
stable with our max 8G of memory.
I'm glad that your setup is stable. I do have following cache setup here:
$ grep cache `find . -name 'xwiki.cfg'`
#-# Put a cache in front of the document store. This greatly improves
performance at the cost of memory consumption.
xwiki.store.cache=1
#-# Maximum number of documents to keep in the cache.
xwiki.store.cache.capacity=100
#-# Maximum number of documents to keep in the rendered cache
xwiki.render.cache.capacity=100
# xwiki.authentication.ldap.groupcache_expiration=21600
xwiki.plugin.image.cache.capacity=30
this is XWiki 6.0.1 on top of Tomcat 7.0.53 using PostgreSQL 9.3/64bit. The
JVM is 1.7.0_07 everything running on Solaris 11.1. When I give 2GB RAM to
catalina by:
$ cat bin/setenv.sh
CATALINA_OPTS="-server -Xms2048m -Xmx2048m -XX:MaxPermSize=196m
-Dfile.encoding=utf-8 -Djava.awt.headless=true -XX:+UseParallelGC
-XX:MaxGCPauseMillis=100"
export CATALINA_OPTS
and then run my benchmark which is just using REST to import following
simple page:
"<?xml version=\"1.0\" encoding=\"UTF-8\"
standalone=\"yes\"?>"
++ "<page xmlns=\"http://www.xwiki.org\">"
++ "<title>Semantic XWiki Benchmark page " ++ title ++
"</title>"
++ "<syntax>xwiki/2.0</syntax>"
++ "<content>This is a benchark page."
++ "The list of properties defined for this page is:"
++ "</content>"
++ "</page>"
where title is BenchPage_<number>
Now, when I pushed that, then after around 400k pages imported I hit OOM
error. JConsole is thrown out by closed connection and even benchmark tool
complains about few 500 HTTP error codes received. The exception output on
Tomcat's console looks:
Exception in thread "DefaultQuartzScheduler_QuartzSchedulerThread"
java.lang.OutOfMemoryError: Java heap space
Exception in thread "RMI TCP Connection(idle)" Exception in thread "RMI
TCP
Connection(idle)" java.lang.OutOfMemoryError: Java heap space
java.lang.OutOfMemoryError: Java heap space
Exception in thread
"TxCleanupService,platform.security.authorization.cache,local"
java.lang.OutOfMemoryError: Java heap space
Exception in thread "TxCleanupService,localization.bundle.document,local"
Exception in thread "TxCleanupService,wiki.descriptor.cache.wikiId,local"
java.lang.OutOfMemoryError: Java heap space
java.lang.OutOfMemoryError: Java heap space
Exception in thread "TxCleanupService,xwiki.store.pageexistcache,local"
java.lang.OutOfMemoryError: Java heap space
Exception in thread "TxCleanupService,xwiki.store.pagecache,local"
java.lang.OutOfMemoryError: Java heap space
May 30, 2014 4:12:18 PM org.restlet.engine.application.StatusFilter doHandle
WARNING: Exception or error caught in status service
java.lang.OutOfMemoryError: Java heap space
May 30, 2014 4:12:18 PM org.restlet.engine.application.StatusFilter doHandle
WARNING: Exception or error caught in status service
java.lang.OutOfMemoryError: Java heap space
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2442)
at java.lang.Class.getMethod0(Class.java:2685)
at java.lang.Class.getMethod(Class.java:1620)
at
org.xwiki.legacy.internal.oldcore.notification.LegacyNotificationDispatcher.getNotificationManager(LegacyNotificationDispatcher.java:94)
at
org.xwiki.legacy.internal.oldcore.notification.LegacyNotificationDispatcher.onEvent(LegacyNotificationDispatcher.java:109)
at
org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:299)
at
org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:264)
at com.xpn.xwiki.XWiki.saveDocument(XWiki.java:1323)
at com.xpn.xwiki.api.Document.saveDocument(Document.java:2299)
at com.xpn.xwiki.api.Document.save(Document.java:2202)
at com.xpn.xwiki.api.Document.save(Document.java:2196)
at
org.xwiki.rest.internal.resources.pages.ModifiablePageResource.putPage(ModifiablePageResource.java:67)
at
org.xwiki.rest.internal.resources.pages.PageResourceImpl.putPage(PageResourceImpl.java:62)
at sun.reflect.GeneratedMethodAccessor296.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at
org.restlet.ext.jaxrs.internal.wrappers.AbstractMethodWrapper.internalInvoke(AbstractMethodWrapper.java:171)
at
org.restlet.ext.jaxrs.internal.wrappers.ResourceMethod.invoke(ResourceMethod.java:291)
at
org.restlet.ext.jaxrs.JaxRsRestlet.invokeMethod(JaxRsRestlet.java:1043)
at org.restlet.ext.jaxrs.JaxRsRestlet.handle(JaxRsRestlet.java:792)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Router.doHandle(Router.java:500)
at org.restlet.routing.Router.handle(Router.java:740)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
May 30, 2014 4:12:18 PM org.restlet.engine.application.StatusFilter doHandle
WARNING: Exception or error caught in status service
java.lang.OutOfMemoryError: Java heap space
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2442)
at java.lang.Class.getMethod0(Class.java:2685)
at java.lang.Class.getMethod(Class.java:1620)
at
org.xwiki.legacy.internal.oldcore.notification.LegacyNotificationDispatcher.getNotificationManager(LegacyNotificationDispatcher.java:94)
at
org.xwiki.legacy.internal.oldcore.notification.LegacyNotificationDispatcher.onEvent(LegacyNotificationDispatcher.java:109)
at
org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:299)
at
org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:264)
at com.xpn.xwiki.XWiki.saveDocument(XWiki.java:1323)
at com.xpn.xwiki.api.Document.saveDocument(Document.java:2299)
at com.xpn.xwiki.api.Document.save(Document.java:2202)
at com.xpn.xwiki.api.Document.save(Document.java:2196)
at
org.xwiki.rest.internal.resources.pages.ModifiablePageResource.putPage(ModifiablePageResource.java:67)
at
org.xwiki.rest.internal.resources.pages.PageResourceImpl.putPage(PageResourceImpl.java:62)
at sun.reflect.GeneratedMethodAccessor296.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at
org.restlet.ext.jaxrs.internal.wrappers.AbstractMethodWrapper.internalInvoke(AbstractMethodWrapper.java:171)
at
org.restlet.ext.jaxrs.internal.wrappers.ResourceMethod.invoke(ResourceMethod.java:291)
at
org.restlet.ext.jaxrs.JaxRsRestlet.invokeMethod(JaxRsRestlet.java:1043)
at org.restlet.ext.jaxrs.JaxRsRestlet.handle(JaxRsRestlet.java:792)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Router.doHandle(Router.java:500)
at org.restlet.routing.Router.handle(Router.java:740)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
May 30, 2014 4:12:18 PM org.restlet.engine.application.StatusFilter doHandle
WARNING: Exception or error caught in status service
java.lang.OutOfMemoryError: Java heap space
2014-05-30 16:12:18,851 [DefaultQuartzScheduler_Worker-7] ERROR
o.q.c.JobRunShell - Job
DEFAULT.xwiki:Scheduler.WatchListHourlyNotifier_0 threw an unhandled
Exception:
java.lang.OutOfMemoryError: Java heap space
2014-05-30 16:12:18,856 [XWiki Solr index thread] WARN
o.h.u.JDBCExceptionReporter - SQL Error: 0, SQLState: 08001
2014-05-30 16:12:18,856 [XWiki Solr index thread] ERROR
o.h.u.JDBCExceptionReporter - The connection attempt failed.
2014-05-30 16:12:18,858 [DefaultQuartzScheduler_Worker-7] ERROR
o.q.c.ErrorLogger - Job
(DEFAULT.xwiki:Scheduler.WatchListHourlyNotifier_0 threw an exception.
org.quartz.SchedulerException: Job threw an unhandled exception.
at org.quartz.core.JobRunShell.run(JobRunShell.java:213)
~[quartz-1.6.5.jar:1.6.5]
at
org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:525)
[quartz-1.6.5.jar:1.6.5]
Caused by: java.lang.OutOfMemoryError: Java heap space
2014-05-30 16:12:18,859 [DefaultQuartzScheduler_Worker-7] ERROR
c.x.x.p.s.StatusListener - Job
(DEFAULT.xwiki:Scheduler.WatchListHourlyNotifier_0 threw an exception.
org.quartz.SchedulerException: Job threw an unhandled exception.
at org.quartz.core.JobRunShell.run(JobRunShell.java:213)
~[quartz-1.6.5.jar:1.6.5]
at
org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:525)
[quartz-1.6.5.jar:1.6.5]
Caused by: java.lang.OutOfMemoryError: Java heap space
Funny thing is that before the error JConsole does not show any signs that
the server was allocating a lot of memory. Probably this should be quick
spike in mem consumption or otherwise I don't understand at all why this
happen.
Now, the question is: I do have or I think I do have very limited cache
setup here. I've increase RAM side to 2GB which is over the recommended size
by xwiki.org itself -- they warn about size bigger than 1GB due to slowness
of GC then. Anyway, 2GB, limited size of cache and yet I hit OOM. Do you
think I shall increase RAM limit even further?
Thanks!
Karel
_______________________________________________
devs mailing list
devs(a)xwiki.org
http://lists.xwiki.org/mailman/listinfo/devs
10:02 p.m.
Thomas,
very good idea, but unfortunately my user is Admin and fortunately it
does have automatic document watching (found in Watchlist) disabled
since otherwise it would probably attempt to sent email to
webmaster(a)xwiki.org...
Anyway, is there any other user in the Xwiki created by default with
automatic document watching enabled and email set? At least I don't see
any in http://localhost:8080/xwiki/bin/view/Main/UserDirectory (except
Admin)
Thanks!
Karel
On 05/30/14 08:31 PM, Thomas Mortagne wrote:
The references to the watclist in your log make me
think about
something: go to you XWiki user profile, disable "Automatic document
watching" in Watchlist section and try again.
By default evey time a user create a page it's added to his watchlist
and I'm wondering if your OOM here is watchlist trying to generate a
mail about what happen in the past hour which would certainly generate
a huge mail for 400k documents.
On Fri, May 30, 2014 at 8:12 PM, Karel Gardas<karel.gardas(a)centrum.cz> wrote:
Paul,
On 05/28/14 08:11 PM, Paul Libbrecht wrote:
yes, I'm sure the test is not that realistic so far since majority of xwiki
usecases is probably download/rendering of page than upload of page which
I'm testing now. The reason of my test is simple, my task is to attempt
importing whole Wikipedia content w/o history into the XWiki. For this I
need to have it stable for import which is something I do have problem now.
>
> Of course I know the way how to increase Java's memory space/heap
> space. The problem is that this will not help here. Simply if I
> do so and then create 100 millions of pages on one run I will
> still get to the same issue just it'll take a lot longer.
You won't reach 100 time the memory taken by downloading a 100
million pages after you download a million pages. The caches have
limits and you should measure how much memory in your setting is
needed to reach that limit. Tests such as yours, after they reach the
max, will get slower because of the DB access following the cache
eviction; they are not very realistic under that point of view. The best way to follow this is to use JMX and get
a graph of the
cache values, you should see maximum be reached after a while. At
curriki, we have adjusted the caches to be a bit bigger and we do
reach the maximum (100'000 if I remember well, for the document
cache) after about an hour after the restart. Then things get pretty
stable with our max 8G of memory.
I'm glad that your setup is stable. I do have following cache setup here:
$ grep cache `find . -name 'xwiki.cfg'`
#-# Put a cache in front of the document store. This greatly improves
performance at the cost of memory consumption.
xwiki.store.cache=1
#-# Maximum number of documents to keep in the cache.
xwiki.store.cache.capacity=100
#-# Maximum number of documents to keep in the rendered cache
xwiki.render.cache.capacity=100
# xwiki.authentication.ldap.groupcache_expiration=21600
xwiki.plugin.image.cache.capacity=30
this is XWiki 6.0.1 on top of Tomcat 7.0.53 using PostgreSQL 9.3/64bit. The
JVM is 1.7.0_07 everything running on Solaris 11.1. When I give 2GB RAM to
catalina by:
$ cat bin/setenv.sh
CATALINA_OPTS="-server -Xms2048m -Xmx2048m -XX:MaxPermSize=196m
-Dfile.encoding=utf-8 -Djava.awt.headless=true -XX:+UseParallelGC
-XX:MaxGCPauseMillis=100"
export CATALINA_OPTS
and then run my benchmark which is just using REST to import following
simple page:
"<?xml version=\"1.0\" encoding=\"UTF-8\"
standalone=\"yes\"?>"
++ "<page xmlns=\"http://www.xwiki.org\">"
++ "<title>Semantic XWiki Benchmark page " ++ title ++
"</title>"
++ "<syntax>xwiki/2.0</syntax>"
++ "<content>This is a benchark page."
++ "The list of properties defined for this page is:"
++ "</content>"
++ "</page>"
where title is BenchPage_<number>
Now, when I pushed that, then after around 400k pages imported I hit OOM
error. JConsole is thrown out by closed connection and even benchmark tool
complains about few 500 HTTP error codes received. The exception output on
Tomcat's console looks:
Exception in thread "DefaultQuartzScheduler_QuartzSchedulerThread"
java.lang.OutOfMemoryError: Java heap space
Exception in thread "RMI TCP Connection(idle)" Exception in thread "RMI
TCP
Connection(idle)" java.lang.OutOfMemoryError: Java heap space
java.lang.OutOfMemoryError: Java heap space
Exception in thread
"TxCleanupService,platform.security.authorization.cache,local"
java.lang.OutOfMemoryError: Java heap space
Exception in thread "TxCleanupService,localization.bundle.document,local"
Exception in thread "TxCleanupService,wiki.descriptor.cache.wikiId,local"
java.lang.OutOfMemoryError: Java heap space
java.lang.OutOfMemoryError: Java heap space
Exception in thread "TxCleanupService,xwiki.store.pageexistcache,local"
java.lang.OutOfMemoryError: Java heap space
Exception in thread "TxCleanupService,xwiki.store.pagecache,local"
java.lang.OutOfMemoryError: Java heap space
May 30, 2014 4:12:18 PM org.restlet.engine.application.StatusFilter doHandle
WARNING: Exception or error caught in status service
java.lang.OutOfMemoryError: Java heap space
May 30, 2014 4:12:18 PM org.restlet.engine.application.StatusFilter doHandle
WARNING: Exception or error caught in status service
java.lang.OutOfMemoryError: Java heap space
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2442)
at java.lang.Class.getMethod0(Class.java:2685)
at java.lang.Class.getMethod(Class.java:1620)
at
org.xwiki.legacy.internal.oldcore.notification.LegacyNotificationDispatcher.getNotificationManager(LegacyNotificationDispatcher.java:94)
at
org.xwiki.legacy.internal.oldcore.notification.LegacyNotificationDispatcher.onEvent(LegacyNotificationDispatcher.java:109)
at
org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:299)
at
org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:264)
at com.xpn.xwiki.XWiki.saveDocument(XWiki.java:1323)
at com.xpn.xwiki.api.Document.saveDocument(Document.java:2299)
at com.xpn.xwiki.api.Document.save(Document.java:2202)
at com.xpn.xwiki.api.Document.save(Document.java:2196)
at
org.xwiki.rest.internal.resources.pages.ModifiablePageResource.putPage(ModifiablePageResource.java:67)
at
org.xwiki.rest.internal.resources.pages.PageResourceImpl.putPage(PageResourceImpl.java:62)
at sun.reflect.GeneratedMethodAccessor296.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at
org.restlet.ext.jaxrs.internal.wrappers.AbstractMethodWrapper.internalInvoke(AbstractMethodWrapper.java:171)
at
org.restlet.ext.jaxrs.internal.wrappers.ResourceMethod.invoke(ResourceMethod.java:291)
at
org.restlet.ext.jaxrs.JaxRsRestlet.invokeMethod(JaxRsRestlet.java:1043)
at org.restlet.ext.jaxrs.JaxRsRestlet.handle(JaxRsRestlet.java:792)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Router.doHandle(Router.java:500)
at org.restlet.routing.Router.handle(Router.java:740)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
May 30, 2014 4:12:18 PM org.restlet.engine.application.StatusFilter doHandle
WARNING: Exception or error caught in status service
java.lang.OutOfMemoryError: Java heap space
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2442)
at java.lang.Class.getMethod0(Class.java:2685)
at java.lang.Class.getMethod(Class.java:1620)
at
org.xwiki.legacy.internal.oldcore.notification.LegacyNotificationDispatcher.getNotificationManager(LegacyNotificationDispatcher.java:94)
at
org.xwiki.legacy.internal.oldcore.notification.LegacyNotificationDispatcher.onEvent(LegacyNotificationDispatcher.java:109)
at
org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:299)
at
org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:264)
at com.xpn.xwiki.XWiki.saveDocument(XWiki.java:1323)
at com.xpn.xwiki.api.Document.saveDocument(Document.java:2299)
at com.xpn.xwiki.api.Document.save(Document.java:2202)
at com.xpn.xwiki.api.Document.save(Document.java:2196)
at
org.xwiki.rest.internal.resources.pages.ModifiablePageResource.putPage(ModifiablePageResource.java:67)
at
org.xwiki.rest.internal.resources.pages.PageResourceImpl.putPage(PageResourceImpl.java:62)
at sun.reflect.GeneratedMethodAccessor296.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at
org.restlet.ext.jaxrs.internal.wrappers.AbstractMethodWrapper.internalInvoke(AbstractMethodWrapper.java:171)
at
org.restlet.ext.jaxrs.internal.wrappers.ResourceMethod.invoke(ResourceMethod.java:291)
at
org.restlet.ext.jaxrs.JaxRsRestlet.invokeMethod(JaxRsRestlet.java:1043)
at org.restlet.ext.jaxrs.JaxRsRestlet.handle(JaxRsRestlet.java:792)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Router.doHandle(Router.java:500)
at org.restlet.routing.Router.handle(Router.java:740)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
May 30, 2014 4:12:18 PM org.restlet.engine.application.StatusFilter doHandle
WARNING: Exception or error caught in status service
java.lang.OutOfMemoryError: Java heap space
2014-05-30 16:12:18,851 [DefaultQuartzScheduler_Worker-7] ERROR
o.q.c.JobRunShell - Job
DEFAULT.xwiki:Scheduler.WatchListHourlyNotifier_0 threw an unhandled
Exception:
java.lang.OutOfMemoryError: Java heap space
2014-05-30 16:12:18,856 [XWiki Solr index thread] WARN
o.h.u.JDBCExceptionReporter - SQL Error: 0, SQLState: 08001
2014-05-30 16:12:18,856 [XWiki Solr index thread] ERROR
o.h.u.JDBCExceptionReporter - The connection attempt failed.
2014-05-30 16:12:18,858 [DefaultQuartzScheduler_Worker-7] ERROR
o.q.c.ErrorLogger - Job
(DEFAULT.xwiki:Scheduler.WatchListHourlyNotifier_0 threw an exception.
org.quartz.SchedulerException: Job threw an unhandled exception.
at org.quartz.core.JobRunShell.run(JobRunShell.java:213)
~[quartz-1.6.5.jar:1.6.5]
at
org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:525)
[quartz-1.6.5.jar:1.6.5]
Caused by: java.lang.OutOfMemoryError: Java heap space
2014-05-30 16:12:18,859 [DefaultQuartzScheduler_Worker-7] ERROR
c.x.x.p.s.StatusListener - Job
(DEFAULT.xwiki:Scheduler.WatchListHourlyNotifier_0 threw an exception.
org.quartz.SchedulerException: Job threw an unhandled exception.
at org.quartz.core.JobRunShell.run(JobRunShell.java:213)
~[quartz-1.6.5.jar:1.6.5]
at
org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:525)
[quartz-1.6.5.jar:1.6.5]
Caused by: java.lang.OutOfMemoryError: Java heap space
Funny thing is that before the error JConsole does not show any signs that
the server was allocating a lot of memory. Probably this should be quick
spike in mem consumption or otherwise I don't understand at all why this
happen.
Now, the question is: I do have or I think I do have very limited cache
setup here. I've increase RAM side to 2GB which is over the recommended size
by xwiki.org itself -- they warn about size bigger than 1GB due to slowness
of GC then. Anyway, 2GB, limited size of cache and yet I hit OOM. Do you
think I shall increase RAM limit even further?
Thanks!
Karel
_______________________________________________
devs mailing list
devs(a)xwiki.org
http://lists.xwiki.org/mailman/listinfo/devs
11:27 p.m.
On Fri, May 30, 2014 at 10:02 PM, Karel Gardas <karel.gardas(a)centrum.cz> wrote:
Thomas,
very good idea, but unfortunately my user is Admin and fortunately it does
have automatic document watching (found in Watchlist) disabled since
otherwise it would probably attempt to sent email to webmaster(a)xwiki.org...
Anyway, is there any other user in the Xwiki created by default with
automatic document watching enabled and email set? At least I don't see any
in http://localhost:8080/xwiki/bin/view/Main/UserDirectory (except Admin)
That would not matter since you are using Admin user.
Thanks!
Karel
On 05/30/14 08:31 PM, Thomas Mortagne wrote:
--
Thomas Mortagne
The references to the watclist in your log make me think about
something: go to you XWiki user profile, disable "Automatic document
watching" in Watchlist section and try again.
By default evey time a user create a page it's added to his watchlist
and I'm wondering if your OOM here is watchlist trying to generate a
mail about what happen in the past hour which would certainly generate
a huge mail for 400k documents.
On Fri, May 30, 2014 at 8:12 PM, Karel Gardas<karel.gardas(a)centrum.cz>
wrote:
Paul,
On 05/28/14 08:11 PM, Paul Libbrecht wrote:
>>
>>
>> Of course I know the way how to increase Java's memory space/heap
>> space. The problem is that this will not help here. Simply if I
>> do so and then create 100 millions of pages on one run I will
>> still get to the same issue just it'll take a lot longer.
You won't reach 100 time the memory taken by downloading a 100
million pages after you download a million pages. The caches have
limits and you should measure how much memory in your setting is
needed to reach that limit. Tests such as yours, after they reach the
max, will get slower because of the DB access following the cache
eviction; they are not very realistic under that point of view.
yes, I'm sure the test is not that realistic so far since majority of
xwiki
usecases is probably download/rendering of page than upload of page which
I'm testing now. The reason of my test is simple, my task is to attempt
importing whole Wikipedia content w/o history into the XWiki. For this I
need to have it stable for import which is something I do have problem
now.
The best way to follow this is to use JMX and get
a graph of the
cache values, you should see maximum be reached after a while. At
curriki, we have adjusted the caches to be a bit bigger and we do
reach the maximum (100'000 if I remember well, for the document
cache) after about an hour after the restart. Then things get pretty
stable with our max 8G of memory.
I'm glad that your setup is stable. I do have following cache setup here:
$ grep cache `find . -name 'xwiki.cfg'`
#-# Put a cache in front of the document store. This greatly improves
performance at the cost of memory consumption.
xwiki.store.cache=1
#-# Maximum number of documents to keep in the cache.
xwiki.store.cache.capacity=100
#-# Maximum number of documents to keep in the rendered cache
xwiki.render.cache.capacity=100
# xwiki.authentication.ldap.groupcache_expiration=21600
xwiki.plugin.image.cache.capacity=30
this is XWiki 6.0.1 on top of Tomcat 7.0.53 using PostgreSQL 9.3/64bit.
The
JVM is 1.7.0_07 everything running on Solaris 11.1. When I give 2GB RAM
to
catalina by:
$ cat bin/setenv.sh
CATALINA_OPTS="-server -Xms2048m -Xmx2048m -XX:MaxPermSize=196m
-Dfile.encoding=utf-8 -Djava.awt.headless=true -XX:+UseParallelGC
-XX:MaxGCPauseMillis=100"
export CATALINA_OPTS
and then run my benchmark which is just using REST to import following
simple page:
"<?xml version=\"1.0\" encoding=\"UTF-8\"
standalone=\"yes\"?>"
++ "<page xmlns=\"http://www.xwiki.org\">"
++ "<title>Semantic XWiki Benchmark page " ++ title ++
"</title>"
++ "<syntax>xwiki/2.0</syntax>"
++ "<content>This is a benchark page."
++ "The list of properties defined for this page is:"
++ "</content>"
++ "</page>"
where title is BenchPage_<number>
Now, when I pushed that, then after around 400k pages imported I hit OOM
error. JConsole is thrown out by closed connection and even benchmark
tool
complains about few 500 HTTP error codes received. The exception output
on
Tomcat's console looks:
Exception in thread "DefaultQuartzScheduler_QuartzSchedulerThread"
java.lang.OutOfMemoryError: Java heap space
Exception in thread "RMI TCP Connection(idle)" Exception in thread "RMI
TCP
Connection(idle)" java.lang.OutOfMemoryError: Java heap space
java.lang.OutOfMemoryError: Java heap space
Exception in thread
"TxCleanupService,platform.security.authorization.cache,local"
java.lang.OutOfMemoryError: Java heap space
Exception in thread "TxCleanupService,localization.bundle.document,local"
Exception in thread "TxCleanupService,wiki.descriptor.cache.wikiId,local"
java.lang.OutOfMemoryError: Java heap space
java.lang.OutOfMemoryError: Java heap space
Exception in thread "TxCleanupService,xwiki.store.pageexistcache,local"
java.lang.OutOfMemoryError: Java heap space
Exception in thread "TxCleanupService,xwiki.store.pagecache,local"
java.lang.OutOfMemoryError: Java heap space
May 30, 2014 4:12:18 PM org.restlet.engine.application.StatusFilter
doHandle
WARNING: Exception or error caught in status service
java.lang.OutOfMemoryError: Java heap space
May 30, 2014 4:12:18 PM org.restlet.engine.application.StatusFilter
doHandle
WARNING: Exception or error caught in status service
java.lang.OutOfMemoryError: Java heap space
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2442)
at java.lang.Class.getMethod0(Class.java:2685)
at java.lang.Class.getMethod(Class.java:1620)
at
org.xwiki.legacy.internal.oldcore.notification.LegacyNotificationDispatcher.getNotificationManager(LegacyNotificationDispatcher.java:94)
at
org.xwiki.legacy.internal.oldcore.notification.LegacyNotificationDispatcher.onEvent(LegacyNotificationDispatcher.java:109)
at
org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:299)
at
org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:264)
at com.xpn.xwiki.XWiki.saveDocument(XWiki.java:1323)
at com.xpn.xwiki.api.Document.saveDocument(Document.java:2299)
at com.xpn.xwiki.api.Document.save(Document.java:2202)
at com.xpn.xwiki.api.Document.save(Document.java:2196)
at
org.xwiki.rest.internal.resources.pages.ModifiablePageResource.putPage(ModifiablePageResource.java:67)
at
org.xwiki.rest.internal.resources.pages.PageResourceImpl.putPage(PageResourceImpl.java:62)
at sun.reflect.GeneratedMethodAccessor296.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at
org.restlet.ext.jaxrs.internal.wrappers.AbstractMethodWrapper.internalInvoke(AbstractMethodWrapper.java:171)
at
org.restlet.ext.jaxrs.internal.wrappers.ResourceMethod.invoke(ResourceMethod.java:291)
at
org.restlet.ext.jaxrs.JaxRsRestlet.invokeMethod(JaxRsRestlet.java:1043)
at
org.restlet.ext.jaxrs.JaxRsRestlet.handle(JaxRsRestlet.java:792)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Router.doHandle(Router.java:500)
at org.restlet.routing.Router.handle(Router.java:740)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
May 30, 2014 4:12:18 PM org.restlet.engine.application.StatusFilter
doHandle
WARNING: Exception or error caught in status service
java.lang.OutOfMemoryError: Java heap space
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2442)
at java.lang.Class.getMethod0(Class.java:2685)
at java.lang.Class.getMethod(Class.java:1620)
at
org.xwiki.legacy.internal.oldcore.notification.LegacyNotificationDispatcher.getNotificationManager(LegacyNotificationDispatcher.java:94)
at
org.xwiki.legacy.internal.oldcore.notification.LegacyNotificationDispatcher.onEvent(LegacyNotificationDispatcher.java:109)
at
org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:299)
at
org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:264)
at com.xpn.xwiki.XWiki.saveDocument(XWiki.java:1323)
at com.xpn.xwiki.api.Document.saveDocument(Document.java:2299)
at com.xpn.xwiki.api.Document.save(Document.java:2202)
at com.xpn.xwiki.api.Document.save(Document.java:2196)
at
org.xwiki.rest.internal.resources.pages.ModifiablePageResource.putPage(ModifiablePageResource.java:67)
at
org.xwiki.rest.internal.resources.pages.PageResourceImpl.putPage(PageResourceImpl.java:62)
at sun.reflect.GeneratedMethodAccessor296.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at
org.restlet.ext.jaxrs.internal.wrappers.AbstractMethodWrapper.internalInvoke(AbstractMethodWrapper.java:171)
at
org.restlet.ext.jaxrs.internal.wrappers.ResourceMethod.invoke(ResourceMethod.java:291)
at
org.restlet.ext.jaxrs.JaxRsRestlet.invokeMethod(JaxRsRestlet.java:1043)
at
org.restlet.ext.jaxrs.JaxRsRestlet.handle(JaxRsRestlet.java:792)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Router.doHandle(Router.java:500)
at org.restlet.routing.Router.handle(Router.java:740)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
May 30, 2014 4:12:18 PM org.restlet.engine.application.StatusFilter
doHandle
WARNING: Exception or error caught in status service
java.lang.OutOfMemoryError: Java heap space
2014-05-30 16:12:18,851 [DefaultQuartzScheduler_Worker-7] ERROR
o.q.c.JobRunShell - Job
DEFAULT.xwiki:Scheduler.WatchListHourlyNotifier_0 threw an unhandled
Exception:
java.lang.OutOfMemoryError: Java heap space
2014-05-30 16:12:18,856 [XWiki Solr index thread] WARN
o.h.u.JDBCExceptionReporter - SQL Error: 0, SQLState: 08001
2014-05-30 16:12:18,856 [XWiki Solr index thread] ERROR
o.h.u.JDBCExceptionReporter - The connection attempt failed.
2014-05-30 16:12:18,858 [DefaultQuartzScheduler_Worker-7] ERROR
o.q.c.ErrorLogger - Job
(DEFAULT.xwiki:Scheduler.WatchListHourlyNotifier_0 threw an exception.
org.quartz.SchedulerException: Job threw an unhandled exception.
at org.quartz.core.JobRunShell.run(JobRunShell.java:213)
~[quartz-1.6.5.jar:1.6.5]
at
org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:525)
[quartz-1.6.5.jar:1.6.5]
Caused by: java.lang.OutOfMemoryError: Java heap space
2014-05-30 16:12:18,859 [DefaultQuartzScheduler_Worker-7] ERROR
c.x.x.p.s.StatusListener - Job
(DEFAULT.xwiki:Scheduler.WatchListHourlyNotifier_0 threw an exception.
org.quartz.SchedulerException: Job threw an unhandled exception.
at org.quartz.core.JobRunShell.run(JobRunShell.java:213)
~[quartz-1.6.5.jar:1.6.5]
at
org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:525)
[quartz-1.6.5.jar:1.6.5]
Caused by: java.lang.OutOfMemoryError: Java heap space
Funny thing is that before the error JConsole does not show any signs
that
the server was allocating a lot of memory. Probably this should be quick
spike in mem consumption or otherwise I don't understand at all why this
happen.
Now, the question is: I do have or I think I do have very limited cache
setup here. I've increase RAM side to 2GB which is over the recommended
size
by xwiki.org itself -- they warn about size bigger than 1GB due to
slowness
of GC then. Anyway, 2GB, limited size of cache and yet I hit OOM. Do you
think I shall increase RAM limit even further?
Thanks!
Karel
_______________________________________________
devs mailing list
devs(a)xwiki.org
http://lists.xwiki.org/mailman/listinfo/devs
12 Jun
12 Jun
5:28 p.m.
I've also tested uploading 1mil of simple pages and 8GB of RAM was not
enough for this. Since probably generating such amount of pages is not
main application domain of XWiki I'm not sure if xwiki devs would
consider this to be a bug or unoptimized case. I'm asking since I find
kind of bad to generate a *big* document describing xwiki changes in the
past hour even there is no one interested in this document and this way
consume all the RAM and get XWiki to OOM error.
Question: shall I report it as a bug or feature request asking for kind
of lazy (when it is actually needed) changelog generation pointing to
this thread?
Thanks!
Karel
On 05/30/14 08:31 PM, Thomas Mortagne wrote:
The references to the watclist in your log make me
think about
something: go to you XWiki user profile, disable "Automatic document
watching" in Watchlist section and try again.
By default evey time a user create a page it's added to his watchlist
and I'm wondering if your OOM here is watchlist trying to generate a
mail about what happen in the past hour which would certainly generate
a huge mail for 400k documents.
On Fri, May 30, 2014 at 8:12 PM, Karel Gardas<karel.gardas(a)centrum.cz> wrote:
Paul,
On 05/28/14 08:11 PM, Paul Libbrecht wrote:
yes, I'm sure the test is not that realistic so far since majority of xwiki
usecases is probably download/rendering of page than upload of page which
I'm testing now. The reason of my test is simple, my task is to attempt
importing whole Wikipedia content w/o history into the XWiki. For this I
need to have it stable for import which is something I do have problem now.
>
> Of course I know the way how to increase Java's memory space/heap
> space. The problem is that this will not help here. Simply if I
> do so and then create 100 millions of pages on one run I will
> still get to the same issue just it'll take a lot longer.
You won't reach 100 time the memory taken by downloading a 100
million pages after you download a million pages. The caches have
limits and you should measure how much memory in your setting is
needed to reach that limit. Tests such as yours, after they reach the
max, will get slower because of the DB access following the cache
eviction; they are not very realistic under that point of view. The best way to follow this is to use JMX and get
a graph of the
cache values, you should see maximum be reached after a while. At
curriki, we have adjusted the caches to be a bit bigger and we do
reach the maximum (100'000 if I remember well, for the document
cache) after about an hour after the restart. Then things get pretty
stable with our max 8G of memory.
I'm glad that your setup is stable. I do have following cache setup here:
$ grep cache `find . -name 'xwiki.cfg'`
#-# Put a cache in front of the document store. This greatly improves
performance at the cost of memory consumption.
xwiki.store.cache=1
#-# Maximum number of documents to keep in the cache.
xwiki.store.cache.capacity=100
#-# Maximum number of documents to keep in the rendered cache
xwiki.render.cache.capacity=100
# xwiki.authentication.ldap.groupcache_expiration=21600
xwiki.plugin.image.cache.capacity=30
this is XWiki 6.0.1 on top of Tomcat 7.0.53 using PostgreSQL 9.3/64bit. The
JVM is 1.7.0_07 everything running on Solaris 11.1. When I give 2GB RAM to
catalina by:
$ cat bin/setenv.sh
CATALINA_OPTS="-server -Xms2048m -Xmx2048m -XX:MaxPermSize=196m
-Dfile.encoding=utf-8 -Djava.awt.headless=true -XX:+UseParallelGC
-XX:MaxGCPauseMillis=100"
export CATALINA_OPTS
and then run my benchmark which is just using REST to import following
simple page:
"<?xml version=\"1.0\" encoding=\"UTF-8\"
standalone=\"yes\"?>"
++ "<page xmlns=\"http://www.xwiki.org\">"
++ "<title>Semantic XWiki Benchmark page " ++ title ++
"</title>"
++ "<syntax>xwiki/2.0</syntax>"
++ "<content>This is a benchark page."
++ "The list of properties defined for this page is:"
++ "</content>"
++ "</page>"
where title is BenchPage_<number>
Now, when I pushed that, then after around 400k pages imported I hit OOM
error. JConsole is thrown out by closed connection and even benchmark tool
complains about few 500 HTTP error codes received. The exception output on
Tomcat's console looks:
Exception in thread "DefaultQuartzScheduler_QuartzSchedulerThread"
java.lang.OutOfMemoryError: Java heap space
Exception in thread "RMI TCP Connection(idle)" Exception in thread "RMI
TCP
Connection(idle)" java.lang.OutOfMemoryError: Java heap space
java.lang.OutOfMemoryError: Java heap space
Exception in thread
"TxCleanupService,platform.security.authorization.cache,local"
java.lang.OutOfMemoryError: Java heap space
Exception in thread "TxCleanupService,localization.bundle.document,local"
Exception in thread "TxCleanupService,wiki.descriptor.cache.wikiId,local"
java.lang.OutOfMemoryError: Java heap space
java.lang.OutOfMemoryError: Java heap space
Exception in thread "TxCleanupService,xwiki.store.pageexistcache,local"
java.lang.OutOfMemoryError: Java heap space
Exception in thread "TxCleanupService,xwiki.store.pagecache,local"
java.lang.OutOfMemoryError: Java heap space
May 30, 2014 4:12:18 PM org.restlet.engine.application.StatusFilter doHandle
WARNING: Exception or error caught in status service
java.lang.OutOfMemoryError: Java heap space
May 30, 2014 4:12:18 PM org.restlet.engine.application.StatusFilter doHandle
WARNING: Exception or error caught in status service
java.lang.OutOfMemoryError: Java heap space
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2442)
at java.lang.Class.getMethod0(Class.java:2685)
at java.lang.Class.getMethod(Class.java:1620)
at
org.xwiki.legacy.internal.oldcore.notification.LegacyNotificationDispatcher.getNotificationManager(LegacyNotificationDispatcher.java:94)
at
org.xwiki.legacy.internal.oldcore.notification.LegacyNotificationDispatcher.onEvent(LegacyNotificationDispatcher.java:109)
at
org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:299)
at
org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:264)
at com.xpn.xwiki.XWiki.saveDocument(XWiki.java:1323)
at com.xpn.xwiki.api.Document.saveDocument(Document.java:2299)
at com.xpn.xwiki.api.Document.save(Document.java:2202)
at com.xpn.xwiki.api.Document.save(Document.java:2196)
at
org.xwiki.rest.internal.resources.pages.ModifiablePageResource.putPage(ModifiablePageResource.java:67)
at
org.xwiki.rest.internal.resources.pages.PageResourceImpl.putPage(PageResourceImpl.java:62)
at sun.reflect.GeneratedMethodAccessor296.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at
org.restlet.ext.jaxrs.internal.wrappers.AbstractMethodWrapper.internalInvoke(AbstractMethodWrapper.java:171)
at
org.restlet.ext.jaxrs.internal.wrappers.ResourceMethod.invoke(ResourceMethod.java:291)
at
org.restlet.ext.jaxrs.JaxRsRestlet.invokeMethod(JaxRsRestlet.java:1043)
at org.restlet.ext.jaxrs.JaxRsRestlet.handle(JaxRsRestlet.java:792)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Router.doHandle(Router.java:500)
at org.restlet.routing.Router.handle(Router.java:740)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
May 30, 2014 4:12:18 PM org.restlet.engine.application.StatusFilter doHandle
WARNING: Exception or error caught in status service
java.lang.OutOfMemoryError: Java heap space
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2442)
at java.lang.Class.getMethod0(Class.java:2685)
at java.lang.Class.getMethod(Class.java:1620)
at
org.xwiki.legacy.internal.oldcore.notification.LegacyNotificationDispatcher.getNotificationManager(LegacyNotificationDispatcher.java:94)
at
org.xwiki.legacy.internal.oldcore.notification.LegacyNotificationDispatcher.onEvent(LegacyNotificationDispatcher.java:109)
at
org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:299)
at
org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:264)
at com.xpn.xwiki.XWiki.saveDocument(XWiki.java:1323)
at com.xpn.xwiki.api.Document.saveDocument(Document.java:2299)
at com.xpn.xwiki.api.Document.save(Document.java:2202)
at com.xpn.xwiki.api.Document.save(Document.java:2196)
at
org.xwiki.rest.internal.resources.pages.ModifiablePageResource.putPage(ModifiablePageResource.java:67)
at
org.xwiki.rest.internal.resources.pages.PageResourceImpl.putPage(PageResourceImpl.java:62)
at sun.reflect.GeneratedMethodAccessor296.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at
org.restlet.ext.jaxrs.internal.wrappers.AbstractMethodWrapper.internalInvoke(AbstractMethodWrapper.java:171)
at
org.restlet.ext.jaxrs.internal.wrappers.ResourceMethod.invoke(ResourceMethod.java:291)
at
org.restlet.ext.jaxrs.JaxRsRestlet.invokeMethod(JaxRsRestlet.java:1043)
at org.restlet.ext.jaxrs.JaxRsRestlet.handle(JaxRsRestlet.java:792)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Router.doHandle(Router.java:500)
at org.restlet.routing.Router.handle(Router.java:740)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
May 30, 2014 4:12:18 PM org.restlet.engine.application.StatusFilter doHandle
WARNING: Exception or error caught in status service
java.lang.OutOfMemoryError: Java heap space
2014-05-30 16:12:18,851 [DefaultQuartzScheduler_Worker-7] ERROR
o.q.c.JobRunShell - Job
DEFAULT.xwiki:Scheduler.WatchListHourlyNotifier_0 threw an unhandled
Exception:
java.lang.OutOfMemoryError: Java heap space
2014-05-30 16:12:18,856 [XWiki Solr index thread] WARN
o.h.u.JDBCExceptionReporter - SQL Error: 0, SQLState: 08001
2014-05-30 16:12:18,856 [XWiki Solr index thread] ERROR
o.h.u.JDBCExceptionReporter - The connection attempt failed.
2014-05-30 16:12:18,858 [DefaultQuartzScheduler_Worker-7] ERROR
o.q.c.ErrorLogger - Job
(DEFAULT.xwiki:Scheduler.WatchListHourlyNotifier_0 threw an exception.
org.quartz.SchedulerException: Job threw an unhandled exception.
at org.quartz.core.JobRunShell.run(JobRunShell.java:213)
~[quartz-1.6.5.jar:1.6.5]
at
org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:525)
[quartz-1.6.5.jar:1.6.5]
Caused by: java.lang.OutOfMemoryError: Java heap space
2014-05-30 16:12:18,859 [DefaultQuartzScheduler_Worker-7] ERROR
c.x.x.p.s.StatusListener - Job
(DEFAULT.xwiki:Scheduler.WatchListHourlyNotifier_0 threw an exception.
org.quartz.SchedulerException: Job threw an unhandled exception.
at org.quartz.core.JobRunShell.run(JobRunShell.java:213)
~[quartz-1.6.5.jar:1.6.5]
at
org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:525)
[quartz-1.6.5.jar:1.6.5]
Caused by: java.lang.OutOfMemoryError: Java heap space
Funny thing is that before the error JConsole does not show any signs that
the server was allocating a lot of memory. Probably this should be quick
spike in mem consumption or otherwise I don't understand at all why this
happen.
Now, the question is: I do have or I think I do have very limited cache
setup here. I've increase RAM side to 2GB which is over the recommended size
by xwiki.org itself -- they warn about size bigger than 1GB due to slowness
of GC then. Anyway, 2GB, limited size of cache and yet I hit OOM. Do you
think I shall increase RAM limit even further?
Thanks!
Karel
_______________________________________________
devs mailing list
devs(a)xwiki.org
http://lists.xwiki.org/mailman/listinfo/devs
5:35 p.m.
On Thu, Jun 12, 2014 at 5:28 PM, Karel Gardas <karel.gardas(a)centrum.cz> wrote:
I've also tested uploading 1mil of simple pages and 8GB of RAM was not
enough for this. Since probably generating such amount of pages is not main
application domain of XWiki I'm not sure if xwiki devs would consider this
to be a bug or unoptimized case.
I'm asking since I find kind of bad to
generate a *big* document describing xwiki changes in the past hour even
there is no one interested in this document and this way consume all the RAM
and get XWiki to OOM error.
It does not work that way, mails are created based on users bookmarked pages.
Question: shall I report it as a bug or feature request asking for kind of
lazy (when it is actually needed) changelog generation pointing to this
thread?
Thanks!
Karel
On 05/30/14 08:31 PM, Thomas Mortagne wrote:
--
Thomas Mortagne
The references to the watclist in your log make me think about
something: go to you XWiki user profile, disable "Automatic document
watching" in Watchlist section and try again.
By default evey time a user create a page it's added to his watchlist
and I'm wondering if your OOM here is watchlist trying to generate a
mail about what happen in the past hour which would certainly generate
a huge mail for 400k documents.
On Fri, May 30, 2014 at 8:12 PM, Karel Gardas<karel.gardas(a)centrum.cz>
wrote:
Paul,
On 05/28/14 08:11 PM, Paul Libbrecht wrote:
>>
>>
>> Of course I know the way how to increase Java's memory space/heap
>> space. The problem is that this will not help here. Simply if I
>> do so and then create 100 millions of pages on one run I will
>> still get to the same issue just it'll take a lot longer.
You won't reach 100 time the memory taken by downloading a 100
million pages after you download a million pages. The caches have
limits and you should measure how much memory in your setting is
needed to reach that limit. Tests such as yours, after they reach the
max, will get slower because of the DB access following the cache
eviction; they are not very realistic under that point of view.
yes, I'm sure the test is not that realistic so far since majority of
xwiki
usecases is probably download/rendering of page than upload of page which
I'm testing now. The reason of my test is simple, my task is to attempt
importing whole Wikipedia content w/o history into the XWiki. For this I
need to have it stable for import which is something I do have problem
now.
The best way to follow this is to use JMX and get
a graph of the
cache values, you should see maximum be reached after a while. At
curriki, we have adjusted the caches to be a bit bigger and we do
reach the maximum (100'000 if I remember well, for the document
cache) after about an hour after the restart. Then things get pretty
stable with our max 8G of memory.
I'm glad that your setup is stable. I do have following cache setup here:
$ grep cache `find . -name 'xwiki.cfg'`
#-# Put a cache in front of the document store. This greatly improves
performance at the cost of memory consumption.
xwiki.store.cache=1
#-# Maximum number of documents to keep in the cache.
xwiki.store.cache.capacity=100
#-# Maximum number of documents to keep in the rendered cache
xwiki.render.cache.capacity=100
# xwiki.authentication.ldap.groupcache_expiration=21600
xwiki.plugin.image.cache.capacity=30
this is XWiki 6.0.1 on top of Tomcat 7.0.53 using PostgreSQL 9.3/64bit.
The
JVM is 1.7.0_07 everything running on Solaris 11.1. When I give 2GB RAM
to
catalina by:
$ cat bin/setenv.sh
CATALINA_OPTS="-server -Xms2048m -Xmx2048m -XX:MaxPermSize=196m
-Dfile.encoding=utf-8 -Djava.awt.headless=true -XX:+UseParallelGC
-XX:MaxGCPauseMillis=100"
export CATALINA_OPTS
and then run my benchmark which is just using REST to import following
simple page:
"<?xml version=\"1.0\" encoding=\"UTF-8\"
standalone=\"yes\"?>"
++ "<page xmlns=\"http://www.xwiki.org\">"
++ "<title>Semantic XWiki Benchmark page " ++ title ++
"</title>"
++ "<syntax>xwiki/2.0</syntax>"
++ "<content>This is a benchark page."
++ "The list of properties defined for this page is:"
++ "</content>"
++ "</page>"
where title is BenchPage_<number>
Now, when I pushed that, then after around 400k pages imported I hit OOM
error. JConsole is thrown out by closed connection and even benchmark
tool
complains about few 500 HTTP error codes received. The exception output
on
Tomcat's console looks:
Exception in thread "DefaultQuartzScheduler_QuartzSchedulerThread"
java.lang.OutOfMemoryError: Java heap space
Exception in thread "RMI TCP Connection(idle)" Exception in thread "RMI
TCP
Connection(idle)" java.lang.OutOfMemoryError: Java heap space
java.lang.OutOfMemoryError: Java heap space
Exception in thread
"TxCleanupService,platform.security.authorization.cache,local"
java.lang.OutOfMemoryError: Java heap space
Exception in thread "TxCleanupService,localization.bundle.document,local"
Exception in thread "TxCleanupService,wiki.descriptor.cache.wikiId,local"
java.lang.OutOfMemoryError: Java heap space
java.lang.OutOfMemoryError: Java heap space
Exception in thread "TxCleanupService,xwiki.store.pageexistcache,local"
java.lang.OutOfMemoryError: Java heap space
Exception in thread "TxCleanupService,xwiki.store.pagecache,local"
java.lang.OutOfMemoryError: Java heap space
May 30, 2014 4:12:18 PM org.restlet.engine.application.StatusFilter
doHandle
WARNING: Exception or error caught in status service
java.lang.OutOfMemoryError: Java heap space
May 30, 2014 4:12:18 PM org.restlet.engine.application.StatusFilter
doHandle
WARNING: Exception or error caught in status service
java.lang.OutOfMemoryError: Java heap space
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2442)
at java.lang.Class.getMethod0(Class.java:2685)
at java.lang.Class.getMethod(Class.java:1620)
at
org.xwiki.legacy.internal.oldcore.notification.LegacyNotificationDispatcher.getNotificationManager(LegacyNotificationDispatcher.java:94)
at
org.xwiki.legacy.internal.oldcore.notification.LegacyNotificationDispatcher.onEvent(LegacyNotificationDispatcher.java:109)
at
org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:299)
at
org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:264)
at com.xpn.xwiki.XWiki.saveDocument(XWiki.java:1323)
at com.xpn.xwiki.api.Document.saveDocument(Document.java:2299)
at com.xpn.xwiki.api.Document.save(Document.java:2202)
at com.xpn.xwiki.api.Document.save(Document.java:2196)
at
org.xwiki.rest.internal.resources.pages.ModifiablePageResource.putPage(ModifiablePageResource.java:67)
at
org.xwiki.rest.internal.resources.pages.PageResourceImpl.putPage(PageResourceImpl.java:62)
at sun.reflect.GeneratedMethodAccessor296.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at
org.restlet.ext.jaxrs.internal.wrappers.AbstractMethodWrapper.internalInvoke(AbstractMethodWrapper.java:171)
at
org.restlet.ext.jaxrs.internal.wrappers.ResourceMethod.invoke(ResourceMethod.java:291)
at
org.restlet.ext.jaxrs.JaxRsRestlet.invokeMethod(JaxRsRestlet.java:1043)
at
org.restlet.ext.jaxrs.JaxRsRestlet.handle(JaxRsRestlet.java:792)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Router.doHandle(Router.java:500)
at org.restlet.routing.Router.handle(Router.java:740)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
May 30, 2014 4:12:18 PM org.restlet.engine.application.StatusFilter
doHandle
WARNING: Exception or error caught in status service
java.lang.OutOfMemoryError: Java heap space
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2442)
at java.lang.Class.getMethod0(Class.java:2685)
at java.lang.Class.getMethod(Class.java:1620)
at
org.xwiki.legacy.internal.oldcore.notification.LegacyNotificationDispatcher.getNotificationManager(LegacyNotificationDispatcher.java:94)
at
org.xwiki.legacy.internal.oldcore.notification.LegacyNotificationDispatcher.onEvent(LegacyNotificationDispatcher.java:109)
at
org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:299)
at
org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:264)
at com.xpn.xwiki.XWiki.saveDocument(XWiki.java:1323)
at com.xpn.xwiki.api.Document.saveDocument(Document.java:2299)
at com.xpn.xwiki.api.Document.save(Document.java:2202)
at com.xpn.xwiki.api.Document.save(Document.java:2196)
at
org.xwiki.rest.internal.resources.pages.ModifiablePageResource.putPage(ModifiablePageResource.java:67)
at
org.xwiki.rest.internal.resources.pages.PageResourceImpl.putPage(PageResourceImpl.java:62)
at sun.reflect.GeneratedMethodAccessor296.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at
org.restlet.ext.jaxrs.internal.wrappers.AbstractMethodWrapper.internalInvoke(AbstractMethodWrapper.java:171)
at
org.restlet.ext.jaxrs.internal.wrappers.ResourceMethod.invoke(ResourceMethod.java:291)
at
org.restlet.ext.jaxrs.JaxRsRestlet.invokeMethod(JaxRsRestlet.java:1043)
at
org.restlet.ext.jaxrs.JaxRsRestlet.handle(JaxRsRestlet.java:792)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Router.doHandle(Router.java:500)
at org.restlet.routing.Router.handle(Router.java:740)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
at org.restlet.routing.Filter.handle(Filter.java:206)
at org.restlet.routing.Filter.doHandle(Filter.java:159)
May 30, 2014 4:12:18 PM org.restlet.engine.application.StatusFilter
doHandle
WARNING: Exception or error caught in status service
java.lang.OutOfMemoryError: Java heap space
2014-05-30 16:12:18,851 [DefaultQuartzScheduler_Worker-7] ERROR
o.q.c.JobRunShell - Job
DEFAULT.xwiki:Scheduler.WatchListHourlyNotifier_0 threw an unhandled
Exception:
java.lang.OutOfMemoryError: Java heap space
2014-05-30 16:12:18,856 [XWiki Solr index thread] WARN
o.h.u.JDBCExceptionReporter - SQL Error: 0, SQLState: 08001
2014-05-30 16:12:18,856 [XWiki Solr index thread] ERROR
o.h.u.JDBCExceptionReporter - The connection attempt failed.
2014-05-30 16:12:18,858 [DefaultQuartzScheduler_Worker-7] ERROR
o.q.c.ErrorLogger - Job
(DEFAULT.xwiki:Scheduler.WatchListHourlyNotifier_0 threw an exception.
org.quartz.SchedulerException: Job threw an unhandled exception.
at org.quartz.core.JobRunShell.run(JobRunShell.java:213)
~[quartz-1.6.5.jar:1.6.5]
at
org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:525)
[quartz-1.6.5.jar:1.6.5]
Caused by: java.lang.OutOfMemoryError: Java heap space
2014-05-30 16:12:18,859 [DefaultQuartzScheduler_Worker-7] ERROR
c.x.x.p.s.StatusListener - Job
(DEFAULT.xwiki:Scheduler.WatchListHourlyNotifier_0 threw an exception.
org.quartz.SchedulerException: Job threw an unhandled exception.
at org.quartz.core.JobRunShell.run(JobRunShell.java:213)
~[quartz-1.6.5.jar:1.6.5]
at
org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:525)
[quartz-1.6.5.jar:1.6.5]
Caused by: java.lang.OutOfMemoryError: Java heap space
Funny thing is that before the error JConsole does not show any signs
that
the server was allocating a lot of memory. Probably this should be quick
spike in mem consumption or otherwise I don't understand at all why this
happen.
Now, the question is: I do have or I think I do have very limited cache
setup here. I've increase RAM side to 2GB which is over the recommended
size
by xwiki.org itself -- they warn about size bigger than 1GB due to
slowness
of GC then. Anyway, 2GB, limited size of cache and yet I hit OOM. Do you
think I shall increase RAM limit even further?
Thanks!
Karel
_______________________________________________
devs mailing list
devs(a)xwiki.org
http://lists.xwiki.org/mailman/listinfo/devs
5:51 p.m.
On 06/12/14 05:35 PM, Thomas Mortagne wrote:
On Thu, Jun 12, 2014 at 5:28 PM, Karel
Gardas<karel.gardas(a)centrum.cz> wrote:
If so, then why I do get OOM error and Notifier seems to be the cause?
Thanks!
Karel
I've also tested uploading 1mil of simple pages and 8GB of RAM was not
enough for this. Since probably generating such amount of pages is not main
application domain of XWiki I'm not sure if xwiki devs would consider this
to be a bug or unoptimized case.
I'm asking since I find kind of bad to
generate a *big* document describing xwiki changes in the past hour even
there is no one interested in this document and this way consume all the RAM
and get XWiki to OOM error.
It does not work that way, mails are created based on users bookmarked pages.
6:14 p.m.
On Thu, Jun 12, 2014 at 5:51 PM, Karel Gardas <karel.gardas(a)centrum.cz> wrote:
On 06/12/14 05:35 PM, Thomas Mortagne wrote:
Did you disabled auto watch in your user profile as I suggested in a
previous mail ?
--
Thomas Mortagne
On Thu, Jun 12, 2014 at 5:28 PM, Karel Gardas<karel.gardas(a)centrum.cz>
wrote:
If so, then why I do get OOM error and Notifier seems to be the cause?
Thanks!
Karel
I've also tested uploading 1mil of simple pages and 8GB of RAM was not
enough for this. Since probably generating such amount of pages is not
main
application domain of XWiki I'm not sure if xwiki devs would consider
this
to be a bug or unoptimized case.
I'm asking since I find kind of bad to
generate a *big* document describing xwiki changes in the past hour even
there is no one interested in this document and this way consume all the
RAM
and get XWiki to OOM error.
It does not work that way, mails are created based on users bookmarked
pages.
7:42 p.m.
On 06/12/14 06:14 PM, Thomas Mortagne wrote:
If so, then why I do get OOM error and Notifier seems to be the cause?
Thanks!
Karel
Did you disabled auto watch in your user profile as I suggested in a
previous mail ?
IIRC I replied[1] that I'm using Admin solely and it does have disabled
auto watch by default and you already replied to it too [2]
Thanks!
Karel
[1]: http://lists.xwiki.org/pipermail/devs/2014-May/056832.html
[2]: http://lists.xwiki.org/pipermail/devs/2014-May/056833.html
I'm asking
since I find kind of bad to
generate a *big* document describing xwiki changes in the past hour even
there is no one interested in this document and this way consume all the
RAM
and get XWiki to OOM error.
It does not work that way, mails are created based on users bookmarked
pages.
13 Jun
13 Jun
6:59 a.m.
If you have an easy way to reproduce the issue you can explain in a
jira issue you should always create one. At worst we will indicate
won't fix we explanation why but I don't have the filling this is a
won't fix.
On Thu, Jun 12, 2014 at 7:42 PM, Karel Gardas <karel.gardas(a)centrum.cz> wrote:
On 06/12/14 06:14 PM, Thomas Mortagne wrote:
Did you disabled auto watch in your user profile as I suggested in a
previous mail ?
IIRC I replied[1] that I'm using Admin solely and it does have disabled auto
watch by default and you already replied to it too [2]
Thanks!
Karel
[1]: http://lists.xwiki.org/pipermail/devs/2014-May/056832.html
[2]: http://lists.xwiki.org/pipermail/devs/2014-May/056833.html
--
Thomas Mortagne
>
> I'm asking since I find kind of bad to
> generate a *big* document describing xwiki changes in the past hour
> even
> there is no one interested in this document and this way consume all
> the
> RAM
> and get XWiki to OOM error.
It does not work that way, mails are created based on users bookmarked
pages.
If so, then why I do get OOM error and Notifier seems to be the cause?
Thanks!
Karel
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Thomas Mortagne