What is PermGen space in Tomcat log catalina.out?

Hi,

When I try to go to "Workflow Reporting" I got the following error in catalina.out:

15:37:13,616 ERROR [http-8080-1] com.documentum.web.common.Trace - Errorhandlerthrew the following errorjava.lang.OutOfMemoryError: PermGen spaceApr 04, 2012 3:37:14 PM org.apache.catalina.connector.CoyoteAdapter serviceSEVERE: An exception or error occurred in the container during the request processingjava.lang.OutOfMemoryError: PermGen space

What is PermGen space?

Please share your knowledge and experience.

Thanks.

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Accepted answers

KSMatson

PermGen or permanent generation is part of the JVM memory where most used and rarely changed java classes are stored to be accessed by the application efficiently rather than removing them from the memory and recompiling them. Its a mechanism by which java manages memory and garbage collection in a nut shell.

To address your issue increase the PermSize and MaxPermSize in your app server as follows. Add these options to the JAVA_OPTS in the catalina.bat and restart.

set JAVA_OPTS=%JAVA_OPTS% -Xms1024m -Xmx1024m -XX:PermSize=256m -XX:MaxPermSize=256m

All comments

KSMatson

To address your issue increase the PermSize and MaxPermSize in your app server as follows. Add these options to the JAVA_OPTS in the catalina.bat and restart.

set JAVA_OPTS=%JAVA_OPTS% -Xms1024m -Xmx1024m -XX:PermSize=256m -XX:MaxPermSize=256m

athati

Thanks Khurram.

In my local Tomcat (Windows) currently I have the following:

set JAVA_OPTS=%JAVA_OPTS% %LOGGING_MANAGER%

Do think the 'set' commend you posted will work on my local (Windows) Tomcat)? When I replace the above current line with the following line you posted, Tomcat is blowing when restarted with the following error:

Apr 09, 2012 11:17:53 AM org.apache.catalina.core.StandardEngine start
INFO: Starting Servlet Engine: Apache Tomcat/6.0.20
Can't load log handler "2localhost.org.apache.juli.FileHandler"
java.lang.ClassNotFoundException: 2localhost.org.apache.juli.FileHandler
java.lang.ClassNotFoundException: 2localhost.org.apache.juli.FileHandler
        at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
        at java.util.logging.LogManager$3.run(LogManager.java:418)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.util.logging.LogManager.loadLoggerHandlers(LogManager.java:405)
        at java.util.logging.LogManager.addLogger(LogManager.java:609)
        at java.util.logging.LogManager.demandLogger(LogManager.java:355)
        at java.util.logging.Logger.getLogger(Logger.java:328)
        at org.apache.juli.logging.DirectJDKLog.<init>(DirectJDKLog.java:71)
        at org.apache.juli.logging.DirectJDKLog.getInstance(DirectJDKLog.java:17
8)
        at org.apache.juli.logging.LogFactory.getInstance(LogFactory.java:170)
        at org.apache.juli.logging.LogFactory.getLog(LogFactory.java:315)
        at org.apache.catalina.core.ContainerBase.getLogger(ContainerBase.java:3
87)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1029)        at org.apache.catalina.core.StandardHost.start(StandardHost.java:722)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)        at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443
)
        at org.apache.catalina.core.StandardService.start(StandardService.java:5
16)
        at org.apache.catalina.core.StandardServer.start(StandardServer.java:710
)
        at org.apache.catalina.startup.Catalina.start(Catalina.java:583)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:601)
        at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
        at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
Can't load log handler "4host-manager.org.apache.juli.FileHandler"
java.lang.ClassNotFoundException: 4host-manager.org.apache.juli.FileHandler
java.lang.ClassNotFoundException: 4host-manager.org.apache.juli.FileHandler
        at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
        at java.util.logging.LogManager$3.run(LogManager.java:418)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.util.logging.LogManager.loadLoggerHandlers(LogManager.java:405)
        at java.util.logging.LogManager.addLogger(LogManager.java:609)
        at java.util.logging.LogManager.demandLogger(LogManager.java:355)
        at java.util.logging.Logger.getLogger(Logger.java:328)
        at org.apache.juli.logging.DirectJDKLog.<init>(DirectJDKLog.java:71)
        at org.apache.juli.logging.DirectJDKLog.getInstance(DirectJDKLog.java:17
8)
        at org.apache.juli.logging.LogFactory.getInstance(LogFactory.java:170)
        at org.apache.juli.logging.LogFactory.getLog(LogFactory.java:315)
        at org.apache.catalina.core.ContainerBase.getLogger(ContainerBase.java:3
87)
        at org.apache.catalina.core.StandardContext.start(StandardContext.java:4
314)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase
.java:791)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:77
1)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:526)        at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.ja
va:630)
        at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.j
ava:556)
        at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:491
)
        at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1206)
        at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java
:314)
        at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(Lifecycl
eSupport.java:119)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)        at org.apache.catalina.core.StandardHost.start(StandardHost.java:722)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)        at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443
)
        at org.apache.catalina.core.StandardService.start(StandardService.java:5
16)
        at org.apache.catalina.core.StandardServer.start(StandardServer.java:710
)
        at org.apache.catalina.startup.Catalina.start(Catalina.java:583)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:601)
        at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
        at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
Can't load log handler "3manager.org.apache.juli.FileHandler"
java.lang.ClassNotFoundException: 3manager.org.apache.juli.FileHandler
java.lang.ClassNotFoundException: 3manager.org.apache.juli.FileHandler
        at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
        at java.util.logging.LogManager$3.run(LogManager.java:418)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.util.logging.LogManager.loadLoggerHandlers(LogManager.java:405)
        at java.util.logging.LogManager.addLogger(LogManager.java:609)
        at java.util.logging.LogManager.demandLogger(LogManager.java:355)
        at java.util.logging.Logger.getLogger(Logger.java:328)
        at org.apache.juli.logging.DirectJDKLog.<init>(DirectJDKLog.java:71)
        at org.apache.juli.logging.DirectJDKLog.getInstance(DirectJDKLog.java:17
8)
        at org.apache.juli.logging.LogFactory.getInstance(LogFactory.java:170)
        at org.apache.juli.logging.LogFactory.getLog(LogFactory.java:315)
        at org.apache.catalina.core.ContainerBase.getLogger(ContainerBase.java:3
87)
        at org.apache.catalina.core.StandardContext.start(StandardContext.java:4
314)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase
.java:791)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:77
1)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:526)        at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.ja
va:630)
        at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.j
ava:556)
        at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:491
)
        at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1206)
        at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java
:314)
        at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(Lifecycl
eSupport.java:119)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)        at org.apache.catalina.core.StandardHost.start(StandardHost.java:722)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)        at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443
)
        at org.apache.catalina.core.StandardService.start(StandardService.java:5
16)
        at org.apache.catalina.core.StandardServer.start(StandardServer.java:710
)
        at org.apache.catalina.startup.Catalina.start(Catalina.java:583)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:601)
        at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
        at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
Apr 09, 2012 11:17:54 AM org.apache.catalina.core.ApplicationContext log
INFO: ContextListener: contextInitialized()
Apr 09, 2012 11:17:54 AM org.apache.catalina.core.ApplicationContext log
INFO: ContextListener: contextInitialized()
Apr 09, 2012 11:17:54 AM org.apache.catalina.core.ApplicationContext log
INFO: SessionListener: contextInitialized()
Apr 09, 2012 11:17:54 AM org.apache.catalina.core.ApplicationContext log
INFO: SessionListener: contextInitialized()
Apr 09, 2012 11:18:07 AM org.apache.coyote.http11.Http11Protocol start
INFO: Starting Coyote HTTP/1.1 on http-8080
Apr 09, 2012 11:18:07 AM org.apache.coyote.http11.Http11Protocol start
INFO: Starting Coyote HTTP/1.1 on http-8080
Apr 09, 2012 11:18:07 AM org.apache.jk.common.ChannelSocket init
INFO: JK: ajp13 listening on /0.0.0.0:8009
Apr 09, 2012 11:18:07 AM org.apache.jk.common.ChannelSocket init
INFO: JK: ajp13 listening on /0.0.0.0:8009
Apr 09, 2012 11:18:07 AM org.apache.jk.server.JkMain start
INFO: Jk running ID=0 time=0/15  config=null
Apr 09, 2012 11:18:07 AM org.apache.jk.server.JkMain start
INFO: Jk running ID=0 time=0/15  config=null
Apr 09, 2012 11:18:07 AM org.apache.catalina.startup.Catalina start
INFO: Server startup in 14302 ms
Apr 09, 2012 11:18:07 AM org.apache.catalina.startup.Catalina start
INFO: Server startup in 14302 ms

I think the set command need to be changed to the corresponding windows version.

Please advise me.

Thanks.

KSMatson

Ok I see what is happening, the juli classloader log manager is not being loaded on start up, this is because of the new env variable added to Tomcat 6.0.20 called "LOGGING_MANAGER".

Just update the catalina.bat as follows

set JAVA_OPTS=%JAVA_OPTS% %LOGGING_MANAGER% -Xms1024m -Xmx1024m -XX:PermSize=256m -XX:MaxPermSize=256m