Jboss7 Error : java.lang.out of memory error permgen space

If you get an error 'java.lang.Out Of Memory Error: PermGen space' in your Jboss application, may be memory space not enough for running your application,

The below error shows on the browser,

Also check in Jboss log using tail command

tail -f /usr/local/jboss-4.2.3.GA/server/default/log/server.log



Caused by: java.lang.OutOfMemoryError: PermGen space

2014-07-02 18:54:09,154 WARN  [org.jboss.seam.web.ExceptionFilter] exception root cause

2014-07-02 18:54:09,154 WARN  [org.jboss.seam.web.ExceptionFilter] running exception handlers

Before increasing MaxPermSize parameter  for jboss application need to check that existing allocated space using ps aux command,

ps aux | grep java



root     15274 20.5 20.7 1714596 424100 ?      Sl   17:26  26:51 /usr/java/jdk1.7.0_21//bin/java -Dprogram.name=run.sh -server -Xms128m -Xmx800m -Dsun.rmi.dgc.client.gcInterval=3600000 -Dsun.rmi.dgc.server.gcInterval=3600000 -Djava.net.preferIPv4Stack=true -Djava.endorsed.dirs=/usr/local/jboss-4.2.3.GA/lib/endorsed -classpath /usr/local/jboss-4.2.3.GA/bin/run.jar:/usr/java/jdk1.7.0_21//lib/tools.jar org.jboss.Main

Add MaxPerSize  :

Open your jboss bin direcotry  /jboss-path/bin
 
Before the update your memory space limit takes a backup copy at any file name
 

if [ "x$JAVA_OPTS" = "x" ]; then

   JAVA_OPTS="-Xms128m -Xmx800m -Dsun.rmi.dgc.client.gcInterval=3600000 -Dsun.rmi.dgc.server.gcInterval=3600000"

fi

Change to

if [ "x$JAVA_OPTS" = "x" ]; then

   JAVA_OPTS="-Xms128m -Xmx1024m -XX:MaxPermSize=512m -Dsun.rmi.dgc.client.gcInterval=3600000 -Dsun.rmi.dgc.server.gcInterval=3600000"

fi

Once make the changes need to restart Jboss