PM39644: NULLPOINTEREXCEPTION WHEN TIMERS EXPIRE WHEN APPLICATION IS INVALIDATING SIP APPLICATION SESSION

PM39644; 7.0.0.17: Nullpointerexception when timers expire when application is
7.0.0.19: WebSphere Application Server V7.0 Fix Pack 19
7.0.0.21: WebSphere Application Server V7.0 Fix Pack 21
7.0.0.23: WebSphere Application Server V7.0 Fix Pack 23
7.0.0.25: WebSphere Application Server V7.0 Fix Pack 25
7.0.0.27: WebSphere Application Server V7.0 Fix Pack 27
7.0.0.29: WebSphere Application Server V7.0 Fix Pack 29
7.0.0.31: WebSphere Application Server V7.0 Fix Pack 31
7.0.0.27: Java SDK 1.6 SR13 FP2 Cumulative Fix for WebSphere Application Server
7.0.0.33: WebSphere Application Server V7.0 Fix Pack 33
7.0.0.35: WebSphere Application Server V7.0 Fix Pack 35
7.0.0.37: WebSphere Application Server V7.0 Fix Pack 37
7.0.0.39: WebSphere Application Server V7.0 Fix Pack 39
7.0.0.41: WebSphere Application Server V7.0 Fix Pack 41
7.0.0.43: WebSphere Application Server V7.0 Fix Pack 43
7.0.0.45: WebSphere Application Server V7.0 Fix Pack 45
7.0.0.19: Java SDK 1.6 SR9 FP2 Cumulative Fix for WebSphere Application Server
7.0.0.21: Java SDK 1.6 SR9 FP2 Cumulative Fix for WebSphere
7.0.0.23: Java SDK 1.6 SR10 FP1 Cumulative Fix for WebSphere
7.0.0.25: Java SDK 1.6 SR11 Cumulative Fix for WebSphere Application Server
7.0.0.27: Java SDK 1.6 SR12 Cumulative Fix for WebSphere Application Server
7.0.0.29: Java SDK 1.6 SR13 FP2 Cumulative Fix for WebSphere Application Server
7.0.0.45: Java SDK 1.6 SR16 FP60 Cumulative Fix for WebSphere Application Server
7.0.0.31: Java SDK 1.6 SR15 Cumulative Fix for WebSphere Application Server
7.0.0.35: Java SDK 1.6 SR16 FP1 Cumulative Fix for WebSphere Application Server
7.0.0.37: Java SDK 1.6 SR16 FP3 Cumulative Fix for WebSphere Application Server
7.0.0.39: Java SDK 1.6 SR16 FP7 Cumulative Fix for WebSphere Application Server
7.0.0.41: Java SDK 1.6 SR16 FP20 Cumulative Fix for WebSphere Application Server
7.0.0.43: Java SDK 1.6 SR16 FP41 Cumulative Fix for WebSphere Application Server

APAR status

• Closed as program error.

Error description

• Product Version:  7.0.0.15
  OS and Additional Information:
  Windows/Linux
  Problem Description:
  A NullPointerException happens when expiration timers expire at
  the same time that the application is invalidating the Session
  Initiation Protocol (SIP) application session:
  
  java.lang.NullPointerException
  
  [5/14/11 4:16:51:512 GMT+02:00] 0000004f SipTimerTask  E
  SipTimerTask
  CWSCT0004E: The following exception has occurred:
  [5/14/11 4:16:51:528 GMT+02:00] 0000004f SipTimerTask  E
  SipTimerTask
  java.lang.NullPointerException
  at
  com.ibm.ws.sip.container.timer.AppSessionTimerListener.getId(App
  SessionTimerListener.java:262)
  at
  com.ibm.ws.sip.container.timer.AppSessionTimerListener.getApplic
  ationId(AppSessionTimerListener.java:278)
  at
  com.ibm.ws.sip.container.timer.ExpirationTimer.getQueueIndex(Exp
  irationTimer.java:151)
  at
  com.ibm.ws.sip.container.appqueue.NativeMessageDispatchingHandle
  r.dispatch(NativeMessageDispatchingHandler.java:173)
  at
  com.ibm.ws.sip.container.was.WASXTasksInvoker.invokeTask(WASXTas
  ksInvoker.java:46)
  at
  com.ibm.ws.sip.container.was.WASXTasksInvoker.invokeTask(WASXTas
  ksInvoker.java:55)
  at
  com.ibm.ws.sip.container.timer.ExpirationTimer.invoke(Expiration
  Timer.java:76)
  at
  com.ibm.ws.sip.container.timer.SipTimerTask.run(SipTimerTask.jav
  a:162)
  at java.util.Timer$TimerImpl.run(Timer.java:291)
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All Session Initiation Protocol (SIP)users  *
  *                  of IBM WebSphere Application Server V7.0    *
  ****************************************************************
  * PROBLEM DESCRIPTION: NullPointerException is thrown when a   *
  *                      SIP application session is expired.     *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  Race condition between SIP application session expiration
  and explicit invalidation is causing to a NullPointerException
  to get thrown.
  

Problem conclusion

• The race condition is solved such that SIP application session
  expiration and explicit invalidation can not happen at the
  same time.
  
  The fix for this APAR is currently targeted for inclusion in
  fix pack 7.0.0.19. 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

• R700 PSY

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