17 Oct
2006
17 Oct
'06
12:24 a.m.
Get more RAM?
I've observed before, when the java heap becomes significantly larger
than the amount of real memory available, garbage collection can
begin to run so slowly that the JVM becomes unresponsive and
eventually dies. Was in a different environment and with (I think)
JDK 1.3, but the symptoms were very similar to what you are observing
here.
On 17 Oct 2006, at 00:11, Smith, Nathan wrote:
Dear xwiki-users,
We are getting a Java exception when saving a 7MB attachment. The
attachment appears to be attached properly, since it appears in the
attachment list and can be downloaded after the error. However,
after attaching four or five files the server becomes so
unresponsive that a restart is required. Configuration Info:
OS: Windows 2000 Server
RAM: 1GB
JDK: 1.5.0_8
App Server: JBoss 4.0.4
Database: MySQL 4.1.21
Note that JBoss is run with -Xmx 512M, and increasing that to -Xmx
1024M has no effect.
I've gone through the attachment documentation and mailing list
archives and didn't see any references to a similar problem. Any
help would be appreciated - I plan to checkout the code and see
what's happening!
Here is the stack trace:
A problem occured while trying to service your request. Please
contact the support if this happens again.
Detailed information:
Error number 0 in 11: Uncaught exception
Wrapped Exception: Java heap space
com.xpn.xwiki.XWikiException: Error number 0 in 11: Uncaught exception
Wrapped Exception: Java heap space
at com.xpn.xwiki.web.ViewEditAction.execute
(ViewEditAction.java:224)
at
org.apache.struts.action.RequestProcessor.processActionPerform
(RequestProcessor.java:421)
at org.apache.struts.action.RequestProcessor.process
(RequestProcessor.java:226)
at org.apache.struts.action.ActionServlet.process
(ActionServlet.java:1164)
at org.apache.struts.action.ActionServlet.doPost
(ActionServlet.java:415)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:
717)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:
810)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter
(ApplicationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter
(ApplicationFilterChain.java:173)
at com.xpn.xwiki.web.SetCharacterEncodingFilter.doFilter
(SetCharacterEncodingFilter.java:127)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter
(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter
(ApplicationFilterChain.java:173)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter
(ReplyHeaderFilter.java:96)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter
(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter
(ApplicationFilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke
(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke
(StandardContextValve.java:178)
at
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke
(SecurityAssociationValve.java:175)
at org.jboss.web.tomcat.security.JaccContextValve.invoke
(JaccContextValve.java:74)
at org.apache.catalina.core.StandardHostValve.invoke
(StandardHostValve.java:126)
at org.apache.catalina.valves.ErrorReportValve.invoke
(ErrorReportValve.java:105)
at org.apache.catalina.core.StandardEngineValve.invoke
(StandardEngineValve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service
(CoyoteAdapter.java:148)
at org.apache.coyote.http11.Http11Processor.process
(Http11Processor.java:869)
at org.apache.coyote.http11.Http11BaseProtocol
$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:
664)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket
(PoolTcpEndpoint.java:527)
at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run
(MasterSlaveWorkerThread.java:112)
at java.lang.Thread.run(Thread.java:595)
Wrapped Exception:
java.lang.OutOfMemoryError: Java heap space
Thanks,
Nathan Smith
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