Exception "java.lang.OutOfMemoryError: Java heap space" in RH-SSO Domain Mode

Solution Verified - Updated -

Issue

  • After increasing memory heap size on the domain controller, the java.lang.OutOfMemoryError is still being logged in the JBoss server.log
  • Red Hat Single Sign-On admin console is inaccessible
  • Red Hat Single Sign-On console is unavailable due to following error in server.log
ERROR [stderr] (default Accept) Exception in thread "default Accept" java.lang.OutOfMemoryError: Java heap space
...
Exception: java.lang.OutOfMemoryError thrown from the UncaughtExceptionHandler in thread "default I/O-9"

Environment

  • Red Hat Single Sign-On
    • 7
  • Red Hat JBoss Enterprise Application Platform (EAP)
    • 7

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