PI30853: QUEUE-SIZE PMI COUNTER GETS NEGATIVE ON LOAD INTERMITENTLY

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

• Queue-size PMI counter get negative on load intermitently, due
  to a NPE thrown
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server V8.5 Session Initiation Protocol     *
  *                  (SIP) container                             *
  ****************************************************************
  * PROBLEM DESCRIPTION: SIP queue size Performance Monitoring   *
  *                      Infrastructure (PMI) counter goes       *
  *                      negative intermittently during high     *
  *                      load.                                   *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The negative value of the Queue-Size PMI counter was due to an
  intermittent NullPointerException thrown due to a certain race
  condition.
  

Problem conclusion

• The issue was solved by solving the race condition so that the
  NullPointerException will not be thrown, and thus no negative
  value for the Queue-Size PMI counter is possible.
  
  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

  WEBSPHERE APP S

• Fixed component ID

  5724J0800

Applicable component levels

• R850 PSY

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