PermGen space exception

      PermGen space exception with Maven

•  What is PermGen Space?

             PermGen Stands for  Permanent Generation. PermGen space is a part heap memory.It is used for storing metadata information like class definitions.

•   Why this  OutOfMemoryError  exception occurs?

                       The OutOfMemoryError: PermGen Space error occurs when the permanent generation heap is full. Usually this error is caused by a memory leak.

•    How To Fix this exception ?

               a)MAVEN   

                     If your are using maven you get this error create following  environment variable:

                           MAVEN_OPTS="-Xmx512m -XX:MaxPermSize=128m"

                       Here 128m is double of the default space.

                       Note*: If your using  eclipse for running maven command and setting the MAVEN_OPTS is not               
                   solving problem try to run your maven commands using command line,as sometime it does not  
                   works.

                 b)Tomcat

                       Open catalina.sh Or catalina.bat based on the OS  and change the JAVA_OPTS as follows:

JAVA_OPTS="-Djava.awt.headless=true -Dfile.encoding=UTF-8 
-server -Xms1536m -Xmx1536m
-XX:NewSize=256m -XX:MaxNewSize=256m -XX:PermSize=256m 
-XX:MaxPermSize=256m -XX:+DisableExplicitGC"