Tomcat PermGenSpace on several redeployments

The PermGenSpace bug has been an issue for a long time. Several people have diagnosed this bug in ClassLoader of the JVM and there are several posts which can easily be searched on google.

This issue typically occurs after several reployments to Tomcat. However there are ways to relieve or extend the number of redeployments you can do without having to do full Tomcat restart everytime. You can add the following options to your JAVA_OPTS environment variable in the catalina.bat or catalina.sh file in the bin folder of tomcat:

-Xmx768m -XX:+UseConcMarkSweepGC -XX:+CMSClassUnloadingEnabled -XX:+CMSClassUnloadingEnabled -XX:MaxPermSize=256m