PH13424: BATCH APPLICATION E.G. WEBSPHERE APPLICATION SERVER, HANGS DURING EOT PROCESSING.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• During EOT processing, a batch application TCB hangs in CSQMEOTC
  due to incorrectly waiting for CSQBTEXT to end.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of IBM MQ for z/OS Version 9       *
  *                 Release 0 Modification 0 and Release 1       *
  *                 Modification 0.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: A batch application hangs during EOT    *
  *                      (end of task) processing.               *
  *                      Until the batch application is          *
  *                      canceled, the queue manager will hang   *
  *                      during shutdown processing.             *
  ****************************************************************
  During EOT processing, CSQMEOTC canceled the STIMER that was
  established to run CSQBTEXT, and depending on the result of the
  cancel attempt, determines whether it needs to wait on
  bloa.wEndECB.
  A small timing window in timer processing can result in the
  result returned to MQ incorrectly indicating the wait is needed.
  This results in CSQMEOTC waiting on the ECB indefinitely.
  

Problem conclusion

• CSQMEOTC is changed to no longer cancel the STIMER or wait on
  bloa.wEndECB.
  

Temporary fix

Comments

APAR Information

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

  PH13423

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

  UI66152 UI66153

Modules/Macros

• CSQMEOTC
  

Fix information

• Fixed component name

  IBM MQ Z/OS V9

• Fixed component ID

  5655MQ900

Applicable component levels

• R000 PSY UI66152

     UP19/11/27 P F911

• R100 PSY UI66153

     UP19/11/27 P F911

Fix is available

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