PH10673: PROPERTY COM.IBM.WS.RUNTIME.DUMPSHUTDOWN=TRUE CAUSES TWO HEAPDUMPS AND TWO JAVA CORES DURING SHUTDOWN.

9.0.5.2: WebSphere Application Server traditional Version 9.0.5 Fix Pack 2
8.5.5.17: WebSphere Application Server V8.5.5 Fix Pack 17
9.0.5.3: WebSphere Application Server traditional Version 9.0.5 Fix Pack 3
8.5.5.18: WebSphere Application Server V8.5.5 Fix Pack 18
8.5.5.20: WebSphere Application Server V8.5.5.20
8.5.5.19: WebSphere Application Server V8.5.5 Fix Pack 19
8.5.5.21: WebSphere Application Server V8.5.5.21

APAR status

• Closed as program error.

Error description

• Property com.ibm.ws.runtime.dumpShutdown=true is set to as
  outlined in article:
  Process to get a thread dump or javacore during server shutdown
  https://www-01.ibm.com/support/docview.wss?uid=swg21304559
  
  During shutdown it is generating two heapdumps and two
  javacores during shutdown.
  
  This looks like  the shutdown process is executing the server's
  shutdown hook twice.
  The error does not actually cause any functional problems in
  the server, and the second javacore can simply be ignored.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server                                      *
  ****************************************************************
  * PROBLEM DESCRIPTION: Shutdown diagnostics produce double     *
  *                      javacores during normal server          *
  *                      shutdown                                *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The com.ibm.ws.runtime.dumpShutdown system property configures
  the server to create extra diagnostic output during its
  shutdown process, including call stacks and javacores (or
  thread dumps). Because the code creating the javacore lies
  within a method that's called twice in typical stop scenarios,
  enabling this option will often lead to a second javacore when
  only one should be expected.
  

Problem conclusion

• Additional checking was added during shutdown to avoid
  creating the duplicate javacore.
  
  The fix for this APAR is currently targeted for inclusion in
  fix packs 8.5.5.17 and 9.0.5.2.  Please refer to the
  Recommended Updates page for delivery information:
  http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  WEBS APP SERV N

• Fixed component ID

  5724H8800

Applicable component levels

• R850 PSY

     UP

• R900 PSY

     UP