PM89429: WMQ Z/OS: ABN=5C6-00C51196 IN CSQERWI1+00004EB2

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• An error occurred in a structure (in this case it was injected
  using the INJERROR utility).  During recovery, the following
  abend occurred:
  
  DUMP TITLE=CSQ3,ABN=5C6-00C51196,S=00000825,C=R3600.710.CFM -CS
             QERWI1,M=CSQGFRCV,LOC=CSQELPLM.CSQERWI1+00004EB2
  
  Reason 00C51196 was set when CSQERWI1 tried to update the
  version number of a retrieved entry from the UOW list header in
  the CSQ_ADMIN structure. The eUOW (unit of work control block)
  was deleted from underneath CSQERWI1 by the internal batch
  delete processing.
  
  Additional Keyword(s):
  ABEND5C6 ABENDS5C6 S5C6 S05C6 5C6 00C51196 CSQERWI1
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 7 *
  *                 Release 1 Modification 0.                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: When the queue manager reconnects to a  *
  *                      CF structure after a loss of            *
  *                      connectivity, abend 5C6-00C51196 is     *
  *                      issued.                                 *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The queue manager does some in-syncpoint work for a shared queue
  on CF structure S1 and commits it.
  Before the eUOWDs are cleared out (space limitation or backout
  processing), some more in-syncpoint work is done for a different
  CF structure S2. Before that unit of work is committed, the
  queue manager loses connectivity to the structure S2. When the
  queue manager reconnects, recovery is driven and CSQERWI1 reads
  the eUOWD entries for this queue manager.
  When it finds one, it is processed. As part of the processing,
  the structure number is verified. If there is a mismatch, for
  instance if the eUOWD is from the work that was done on S1, the
  eUOWD version change is undone. In this case, before the version
  change could be reversed, backout processing had removed the
  entry from the admin structure, causing the version reset call
  to fail with IxlRsnCodeNoEntry.
  This return code is unexpected and the queue manager abends with
  5C6-00C51196.
  

Problem conclusion

• The code was changed to tolerate the eUOWDs being deleted before
  the version numbers can be reset, preventing the abend from
  occurring.
  100Y
  CSQERWI1
  

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:

  UK96901

Modules/Macros

• CSQERWI1
  

Fix information

• Fixed component name

  WMQ Z/OS V7

• Fixed component ID

  5655R3600

Applicable component levels

• R100 PSY UK96901

     UP13/09/27 P F309

Fix is available

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