PI32074: NULLPOINTEREXCEPTION IN THREAD POOL CODE OCCURS DURING SERVER SHUTDOWN

8.5.5.5: WebSphere Application Server V8.5.5 Fix Pack 5
8.5.5.6: WebSphere Application Server V8.5.5 Fix Pack 6
8.5.5.7: WebSphere Application Server V8.5.5 Fix Pack 7
8.5.5.8: WebSphere Application Server V8.5.5 Fix Pack 8
8.5.5.9: WebSphere Application Server V8.5.5 Fix Pack 9
8.5.5.10: WebSphere Application Server V8.5.5 Fix Pack 10
8.5.5.11: WebSphere Application Server V8.5.5 Fix Pack 11
8.5.5.12: WebSphere Application Server V8.5.5 Fix Pack 12
8.5.5.13: WebSphere Application Server V8.5.5 Fix Pack 13
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
8.5.5.15: WebSphere Application Server V8.5.5 Fix Pack 15
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
8.5.5.17: WebSphere Application Server V8.5.5 Fix Pack 17
8.5.5.20: WebSphere Application Server V8.5.5.20
8.5.5.18: WebSphere Application Server V8.5.5 Fix Pack 18
8.5.5.19: WebSphere Application Server V8.5.5 Fix Pack 19
8.5.5.16: WebSphere Application Server V8.5.5 Fix Pack 16
8.5.5.21: WebSphere Application Server V8.5.5.21

APAR status

• Closed as program error.

Error description

• An FFDC report could be generated during server shutdown
  that indicates a NullPointerException.  The following is an
  example FFDC report:
  
  
  ------Start of DE processing------ = [12/31/14 11:52:25:573
  GMT]
  Exception = java.lang.NullPointerException
  Source = com.ibm.ws.threading.internal.IntervalTask
  probeid = 878
  Stack Dump = java.lang.NullPointerException
  	at
  com.ibm.ws.threading.internal.ThreadPoolController.isHung(Th
  readPoolController.java:789)
  	at
  com.ibm.ws.threading.internal.ThreadPoolController.resolveHa
  ng(ThreadPoolController.java:837)
  	at
  com.ibm.ws.threading.internal.ThreadPoolController.evaluateI
  nterval(ThreadPoolController.java:683)
  	at
  com.ibm.ws.threading.internal.IntervalTask.run(ThreadPoolCon
  troller.java:877)
  	at java.util.TimerThread.mainLoop(Timer.java:555)
  	at java.util.TimerThread.run(Timer.java:505)
  
  This issue should not effect the server at runtime.  It is
  the result of a race condition that occurs when the thread
  pool is deactivated.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server Liberty Profile                      *
  ****************************************************************
  * PROBLEM DESCRIPTION: NullPointerException in thread pool     *
  *                      code occurs during server shutdown      *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  An FFDC report could be generated during server shutdown that
  indicates a NullPointerException.  The following is an example
  FFDC report:
  
  
  ------Start of DE processing------ = [12/31/14
  11:52:25:573 GMT]
  Exception =
  java.lang.NullPointerException
  Source =
  com.ibm.ws.threading.internal.IntervalTask
  probeid = 878
  Stack
  Dump = java.lang.NullPointerException
  	at
  com.ibm.ws.threading.internal.ThreadPoolController.isHung(Thread
  PoolController.java:789)
  	at
  com.ibm.ws.threading.internal.ThreadPoolController.resolveHang(T
  hreadPoolController.java:837)
  	at
  com.ibm.ws.threading.internal.ThreadPoolController.evaluateInter
  val(ThreadPoolController.java:683)
  	at
  com.ibm.ws.threading.internal.IntervalTask.run(ThreadPoolControl
  ler.java:877)
  	at
  java.util.TimerThread.mainLoop(Timer.java:555)
  	at
  java.util.TimerThread.run(Timer.java:505)
  
  This issue should not
  effect the server at runtime.  It is the result of a race
  condition that occurs when the thread pool is deactivated.
  

Problem conclusion

• The fix for this APAR removes the race condition that
  contributes to the NullPointerException.
  
  The fix for this APAR
  is currently targeted for inclusion in fix pack 8.5.5.5.  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

  WAS LIBERTY COR

• Fixed component ID

  5725L2900

Applicable component levels

• R855 PSY

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