PI18328: WMQ - CLIENT CHANNELS MAY HANG AFTER AN ABEND5C6-00E2000B DUE TO A LACK OF STORAGE IN MSTR ADDRESS SPACE.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• An instance of client channel was in the middle of publishing
  to a TOPIC when a 5C6-00E2000B occurred due to a lack of
  storage in the queue-manager address space.
  At the time of the abend it was holding a read mutex on the
  topic node, but recovery processing did not release the lock.
  This then caused client channels to hang during termination
  processing when they tried to get a write mutex on the topic
  node, and was the reason that the queue-manager needed to be
  FORCE'd.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 7 *
  *                 Release 0 Modification 1 and Release 1       *
  *                 Modification 0.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: Publish subscribe applications hang     *
  *                      when publishing, subscribing or         *
  *                      terminating following an earlier abend  *
  *                      of a publishing application.            *
  *                      In some cases this can cause the        *
  *                      channel initiator and/or queue manager  *
  *                      to hang during shutdown processing.     *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  An application publishing to a topic abended while holding a
  mutex on the topic node, and the subscription that was being
  delivered to.
  Recovery processing did not release the mutexes, which remain
  held until the abending application terminates.
  Any application requiring a write mutex on the same topic or
  subscription hang waiting for these mutexes to be released.
  

Problem conclusion

• CSQMTPUT is changed to release any topic node and subscriber
  mutexes it holds during recovery processing.
  010Y
  100Y
  CSQMTPUT
  

Temporary fix

• *********
  * HIPER *
  *********
  

Comments

APAR Information

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

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

  UI20094 UI20095

Modules/Macros

• CSQMTPUT
  

Fix information

• Fixed component name

  WMQ Z/OS V7

• Fixed component ID

  5655R3600

Applicable component levels

• R010 PSY UI20094

     UP14/08/30 P F408 ¢

• R100 PSY UI20095

     UP14/08/30 P F408 ¢

Fix is available

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