14 Feb
2008
14 Feb
'08
12:23 p.m.
When attempting to upload a 10.5MB file attachment to a page in XE
1.2-milestone-2.5917, user consistently get the error:
Java Heap Space Out Of Memory Exception !
and the operation fails.
Any suggestions on where to start (default java config?)
--
Jim Dowson
CTO, Global Services, EMC Corporation
14 Feb
14 Feb
1:10 p.m.
New subject: [xwiki-users] [Error]: Java heap memory error on adding large attachment
Dowson_Jim(a)emc.com wrote:
When attempting to upload a 10.5MB file attachment to a page in XE
1.2-milestone-2.5917, user consistently get the error:
Java Heap Space Out Of Memory Exception !
Hi,
http://www.xwiki.org/xwiki/bin/view/FAQ/Howtoincreasethemaximumattachmentsi…
Just curiosity, what kind of file are you uploading? An image? Thanks.
HTH,
--
Ricardo Rodríguez
Your EPEC Network ICT Team
5:10 p.m.
Ricardo Rodriguez wrote:
Dowson_Jim(a)emc.com wrote:
>
> When attempting to upload a 10.5MB file attachment to a page in XE
> 1.2-milestone-2.5917, user consistently get the error:
>
> Java Heap Space Out Of Memory Exception !
Hi,
http://www.xwiki.org/xwiki/bin/view/FAQ/Howtoincreasethemaximumattachmen
tsize
Thanks - I have modified the xwiki preferences (as described) - does XE
need to be restarted for it to take effect?
(I haven't changed mySQL yet) - but will do some more testing first.
Just curiosity, what kind of file are you uploading? An
image? Thanks.
An MS Word document.
The error also happened with a 6.5 MB zip file - so the xwiki limit of
10MB may not be the issue (although documents larger than the alleged
1MB MySQL limit have been successfully uploaded).
I'm going to test again, then look at the MySQL params...
Thanks
--
Jim Dowson
CTO, Global Services, (821-76814)
Linx: (617) 598-0505
7:51 p.m.
New subject: [xwiki-users] [Error]: Java heap memory error on adding large attachment
Dowson_Jim(a)emc.com wrote:
An MS Word document.
The error also happened with a 6.5 MB zip file - so the xwiki limit of
10MB may not be the issue (although documents larger than the alleged
1MB MySQL limit have been successfully uploaded).
Thus, the problem may arise from the amount of memory available for
Java. What servlet container are you using? I've seen this error here
running Tomcat. You can increase this amount by passing this parameter
"-Xmx256m -Xms256m" (in this case 256Mb will be the new amount of
available memory) at startup time.
So, you have to shutdown your servlet container, modify some script to
startup.sh, catalina.sh or whatever your are using to launch Tomcat, to
add this paramenters to CATALINA_OPTS or JAVA_OPTS. I have not a clear
idea about what is the right variable to be modified. Any feedback will
be really welcome.
Here is the script I am using here to start Tomcat:
mire:/home/webmaster/bin # cat start_tomcat6
#!/bin/sh
export CATALINA_HOME=/usr/share/tomcat-6.0.10
export JAVA_HOME=/usr/share/java/jre-1.6.0_01
export JRE_HOME=/usr/share/java/jre-1.6.0_01
export CATALINA_OPTS="-Xmx512m -Xms512m"
export JAVA_OPTS="-Xmx512m -Xms512m"
$CATALINA_HOME/bin/startup.sh
As per your question about the need of restarting XWiki so that the new
configuration values become effective. Yes, this is required. xwiki.cfg
is read at deployment time. So if you have any utility that allow you to
restart just one application, you are a lucky person :-) If you have not
it, just restart the servlet container.
I am sure there are people out there with a much more in depth knowledge
about this issue. But this has helped me. I hope it could be useful for
you as well.
Greetings,
--
Ricardo Rodríguez
Your EPEC Network ICT Team
16 Feb
16 Feb
3:24 p.m.
Ricardo Rodriguez wrote:
>Dowson_Jim(a)emc.com wrote:
> An MS Word document.
>
> The error also happened with a 6.5 MB zip file - so the xwiki limit
of
> 10MB may not be the issue (although documents
larger than the alleged
> 1MB MySQL limit have been successfully uploaded).
Thus, the problem may arise from the amount of memory
available for
Java. What servlet container are you using? I've seen this error here
running Tomcat. You can increase this amount by passing this parameter
"-Xmx256m -Xms256m" (in this case 256Mb will be the new amount of
available memory) at startup time.
I'll have to check with the lab folks - I believe they started with the
1.2M2 Windows complete build, then upgraded to 1.2RC2.
I will let you know after I have heard from them.
I wanted to make the changes one step at a time to isolate the root
cause.
So, you have to shutdown your servlet container, modify
some script to
startup.sh, catalina.sh or whatever your are using to launch Tomcat, to
>add this paramenters to CATALINA_OPTS or JAVA_OPTS.
I have not a clear
idea about what is the right variable to be modified.
Any feedback will
be really welcome.
Here is the script I am using here to start Tomcat:
mire:/home/webmaster/bin # cat start_tomcat6
#!/bin/sh
export CATALINA_HOME=/usr/share/tomcat-6.0.10
export JAVA_HOME=/usr/share/java/jre-1.6.0_01
export JRE_HOME=/usr/share/java/jre-1.6.0_01
export CATALINA_OPTS="-Xmx512m -Xms512m"
export JAVA_OPTS="-Xmx512m -Xms512m"
$CATALINA_HOME/bin/startup.sh
As per your question about the need of restarting XWiki
so that the new
configuration values become effective. Yes, this is
required. xwiki.cfg
is read at deployment time. So if you have any utility
that allow you
to
restart just one application, you are a lucky person
:-) If you have
not
it, just restart the servlet container.
I expected that to be the case - and the FAQ should be updated to
reflect that
(I didn't consider myself as authoritative, so I didn't want to edit the
entry).
I would also suggest that the error code (Java ....) be added to the
text as well.
I am sure there are people out there with a much more
in depth
knowledge
about this issue. But this has helped me. I hope it
could be useful for
you as well.
Perhaps, but by speaking, you're the most effective person ;-)
I'll update you (here) after we apply the changes and test again.
Thanks for your help!
3:38 p.m.
New subject: [xwiki-users] [Error]: Java heap memory error on adding large attachment
Dowson_Jim(a)emc.com wrote:
I'll update you (here) after we apply the changes
and test again.
Thanks for your help!
Once you get it running I think we need to hear from anybody else about
the difference between CATALINA_OPTS and JAVA_OPTS to create a
reasonable FAQ entry applying to Tomcat.
Greetings,
--
Ricardo Rodríguez
Your EPEC Network ICT Team
9:20 p.m.
I just looked at catalina.bat and it looks like there is no difference in
how these used - both eventually get into java command line.
Perhaps tomcat guys wanted to keep java and catalina params logically
separated.
Pavel
On Feb 16, 2008 4:38 PM, [Ricardo Rodriguez] Your EPEC Network ICT Team <
webmaster(a)environmentalchange.net> wrote:
Dowson_Jim(a)emc.com wrote:
I'll update you (here) after we apply the
changes and test again.
Thanks for your help!
Once you get it running I think we need to hear from anybody else about
the difference between CATALINA_OPTS and JAVA_OPTS to create a
reasonable FAQ entry applying to Tomcat.
Greetings,
--
Ricardo Rodríguez
Your EPEC Network ICT Team
_______________________________________________
users mailing list
users(a)xwiki.org
http://lists.xwiki.org/mailman/listinfo/users
9:58 p.m.
Here is my version of what happens in Q&A.
* What does out of memory error mean?
- Java virtual machine (which runs tomcat which runs xwiki) has run out of
heap space and cannot allocate anything anymore.
* Is it related to MySQL packet size?
- No
* Why this error happens?
- Because application needs more memory than JMV is allowed to use.
* How is that related to attachments?
- The way xwiki handles attachments is, well, not perfect.
Somewhat related thread is
http://lists.xwiki.org/pipermail/users/2007-November/009362.html
* So what can you do?
- a) Use -Xms and -Xmx java parameters to increase heap size.
- b) Implement and contribute to XWiki effective attachment handling.
* What are the -Xms and -Xmx params?
- -Xms tells java the initial heap size, -Xmx controls max size. The
latter is of special interest in this case and can be increased.
Pavel
On Feb 16, 2008 4:24 PM, <Dowson_Jim(a)emc.com> wrote:
Ricardo Rodriguez wrote:
>Dowson_Jim(a)emc.com wrote:
> An MS Word document.
>
> The error also happened with a 6.5 MB zip file - so the xwiki limit
of
> 10MB may not be the issue (although documents
larger than the alleged
> 1MB MySQL limit have been successfully uploaded).
Thus, the problem may arise from the amount of
memory available for
Java. What servlet container are you using? I've seen this error here
running Tomcat. You can increase this amount by passing this parameter
"-Xmx256m -Xms256m" (in this case 256Mb will be the new amount of
available memory) at startup time.
I'll have to check with the lab folks - I believe they started with the
1.2M2 Windows complete build, then upgraded to 1.2RC2.
I will let you know after I have heard from them.
I wanted to make the changes one step at a time to isolate the root
cause.
So, you have to shutdown your servlet container,
modify some script to
startup.sh, catalina.sh or whatever your are using to launch Tomcat, to
>add this paramenters to CATALINA_OPTS or
JAVA_OPTS. I have not a clear
idea about what is the right variable to be
modified. Any feedback will
be really welcome.
Here is the script I am using here to start
Tomcat:
mire:/home/webmaster/bin # cat start_tomcat6
#!/bin/sh
export CATALINA_HOME=/usr/share/tomcat-6.0.10
export JAVA_HOME=/usr/share/java/jre-1.6.0_01
export JRE_HOME=/usr/share/java/jre-1.6.0_01
export CATALINA_OPTS="-Xmx512m -Xms512m"
export JAVA_OPTS="-Xmx512m -Xms512m"
$CATALINA_HOME/bin/startup.sh
As per your question about the need of restarting
XWiki so that the new
configuration values become effective. Yes, this
is required. xwiki.cfg
is read at deployment time. So if you have any
utility that allow you
to
restart just one application, you are a lucky
person :-) If you have
not
it, just restart the servlet container.
I expected that to be the case - and the FAQ should be updated to
reflect that
(I didn't consider myself as authoritative, so I didn't want to edit the
entry).
I would also suggest that the error code (Java ....) be added to the
text as well.
I am sure there are people out there with a much
more in depth
knowledge
about this issue. But this has helped me. I hope
it could be useful for
you as well.
Perhaps, but by speaking, you're the most effective person ;-)
I'll update you (here) after we apply the changes and test again.
Thanks for your help!
_______________________________________________
users mailing list
users(a)xwiki.org
http://lists.xwiki.org/mailman/listinfo/users
11:09 p.m.
New subject: [xwiki-users] [Error]: Java heap memory error on adding large attachment
Pavel wrote:
Here is my version of what happens in Q&A.
* What does out of memory error mean?
- Java virtual machine (which runs tomcat which runs xwiki) has run
out of heap space and cannot allocate anything anymore.
* Is it related to MySQL packet size?
- No
* Why this error happens?
- Because application needs more memory than JMV is allowed to use.
* How is that related to attachments?
- The way xwiki handles attachments is, well, not perfect.
Somewhat related thread is
http://lists.xwiki.org/pipermail/users/2007-November/009362.html
* So what can you do?
- a) Use -Xms and -Xmx java parameters to increase heap size.
- b) Implement and contribute to XWiki effective attachment handling.
* What are the -Xms and -Xmx params?
- -Xms tells java the initial heap size, -Xmx controls max size. The
latter is of special interest in this case and can be increased.
Pavel
Hi Pavel,
Do you know if this heap size issue happens just working with Tomcat as
servlet container or it is generalizable to other application servers?
It could be advisable clarify that this FAQ applies just to XWiki
running on a Tomcat/MySQL server.
I would add a link to "heap", something as
http://dictionary.zdnet.com/definition/heap.html. I am not a programmer,
so I do need this kind of help to know what is happening with my
installation :-)
As per the CATALINA_OPTS or JAVA_OPTS variables, it would be great to
have a confirmation, but by tracking their values along catalina.sh and
startup.sh I reach the same conclusion you presented. FAQs are wiki
entries, so anybody can modify them! I would add some
sample lines as (this apply to Unix-based systems, could you add that
applying to Windows ones?)...
* to be included in a script calling startup.sh: both variables will be
passed in to the startup process.
export CATALINA_OPTS="-Xmx512m -Xms512m"
export JAVA_OPTS="-Xmx512m -Xms512m"
I am guessing it is of course possible to add this values within
catanina.sh or startup.sh, but I do prefer don't touch these files if
possible.
Cheers,
Ricardo
--
Ricardo Rodríguez
Your EPEC Network ICT Team
17 Feb
17 Feb
10:40 a.m.
Ricardo,
I did not test the issue on different app servers and databases. However,
underlying reasons for this "out of memory" make me strongly believe that
changing DB/AS will make little or no difference.
Pavel
On Feb 17, 2008 12:09 AM, [Ricardo Rodriguez] Your EPEC Network ICT Team <
webmaster(a)environmentalchange.net> wrote:
Pavel wrote:
--
Best regards,
Pavel
Here is my version of what happens in Q&A.
* What does out of memory error mean?
- Java virtual machine (which runs tomcat which runs xwiki) has run
out of heap space and cannot allocate anything anymore.
* Is it related to MySQL packet size?
- No
* Why this error happens?
- Because application needs more memory than JMV is allowed to use.
* How is that related to attachments?
- The way xwiki handles attachments is, well, not perfect.
Somewhat related thread is
http://lists.xwiki.org/pipermail/users/2007-November/009362.html
* So what can you do?
- a) Use -Xms and -Xmx java parameters to increase heap size.
- b) Implement and contribute to XWiki effective attachment handling.
* What are the -Xms and -Xmx params?
- -Xms tells java the initial heap size, -Xmx controls max size. The
latter is of special interest in this case and can be increased.
Pavel
Hi Pavel,
Do you know if this heap size issue happens just working with Tomcat as
servlet container or it is generalizable to other application servers?
It could be advisable clarify that this FAQ applies just to XWiki
running on a Tomcat/MySQL server.
I would add a link to "heap", something as
http://dictionary.zdnet.com/definition/heap.html. I am not a programmer,
so I do need this kind of help to know what is happening with my
installation :-)
As per the CATALINA_OPTS or JAVA_OPTS variables, it would be great to
have a confirmation, but by tracking their values along catalina.sh and
startup.sh I reach the same conclusion you presented. FAQs are wiki
entries, so anybody can modify them! I would add some
sample lines as (this apply to Unix-based systems, could you add that
applying to Windows ones?)...
* to be included in a script calling startup.sh: both variables will be
passed in to the startup process.
export CATALINA_OPTS="-Xmx512m -Xms512m"
export JAVA_OPTS="-Xmx512m -Xms512m"
I am guessing it is of course possible to add this values within
catanina.sh or startup.sh, but I do prefer don't touch these files if
possible.
Cheers,
Ricardo
--
Ricardo Rodríguez
Your EPEC Network ICT Team
_______________________________________________
users mailing list
users(a)xwiki.org
http://lists.xwiki.org/mailman/listinfo/users
19 Feb
19 Feb
8:19 a.m.
New subject: [xwiki-users] [Error]: Java heap memory error on adding large attachment
Pavel wrote:
Ricardo,
I did not test the issue on different app servers and databases.
However, underlying reasons for this "out of memory" make me strongly
believe that changing DB/AS will make little or no difference.
Pavel
Hi Pavel,
Based on your message (almost your message by itself)...
http://www.xwiki.org/xwiki/bin/view/FAQ/HowToSolveAJavaHeapMemoryError
I hope others improves it.
Best,
Ricardo
--
Ricardo Rodríguez
Your EPEC Network ICT Team
6108
days inactive
6113
days old
10 comments
3 participants
participants (3)
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[Ricardo Rodriguez] Your EPEC Network ICT Team -
Dowson_Jim＠emc.com -
Pavel