Java application "java.lang.OutOfMemoryError: Java heap space"

Issue

• JBoss Application server stops accepting incoming requests.

• The following message appears in the JBoss server.log  file :

  ERROR [STDERR] java.lang.OutOfMemoryError: Java heap space 
  

• The following log message appears in the JBoss Operations Network (JON) server log:

  Caused by: java.lang.OutOfMemoryError: Java heap space
  ERROR [STDERR] Exception in thread "RMI TCP Connection(44627)-127.0.0.1"
  ERROR [STDERR] java.lang.OutOfMemoryError: Java heap space
  

• We would like to root cause analysis of the heap dump generated by one of our application (GRCC) and would like to get some recommendation on heap size parameter setting.

• Application crashes 2 times a day due to heap space full and have to be restarted