PI71577: 5C6-00E60092 ABEND IS OCCURING IN MODULE CSQWVZD1 16/10/24 PTF PECHANGE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• 5C6-00E60092 abend is occuring in module CSQWVZD1, and is
  caused by a change made by APAR PI60479 (PTF UI38191).
  .
  The ABEND is due to an overlay of the IIDT control block.
  .
  The problem is in SMF statistics (SMF 115) processing and will
  stop SMF data collection from working correctly.  It will only
  occur in a queue sharing group ( QSG ) environment.
  .
  Additional details:
  The problem is applicable to queue managers which are part of a
  QSG, and which have SMF Statistics collection enabled.
  .
  The scenario which triggeres the problem is when a unit of work
  which has done shared-queue work is backed out. If such a UoW
  has a lot of shared queue changes associated with it (i.e. tens
  of puts or gets of messages to a shared queue), then the error
  can leave bad state in a control block related to SMF statistics
  collection.
  .
  Once this has occurred, the task which collects SMF statistics
  can hit the abend due to the bad state. The abend itself is
  dealt with by the queue manager and application processing will
  continue. However, the SMF statistics will not be collected
  correctly.
  .
  You may also find that once in this state, the abends continue
  to occur whenever SMF statistics collection attempts to run. A
  qmgr restart would be needed to stop the abends.
  .
  Additional Symptom(s) Search Keyword(s):
  CSQESYNC TAB IIDT
  .
  DUMP TITLE=ssid,ABN=5C6-00E60092,U=SYSOPR,
  C=CCCCC.NNN IFC -CQWVZSS,
  M=CSQWVZSS,LOC=CSQWZDG0.CSQWVZD1
  .
  ABN=0C4-00000004 in CSQWVAPR for instruction 4230 8003
  ABEND0C4 ABENDS0C4 0C4 S0C4 S00C4
  

Local fix

• The problem can be circumvented by stopping the collection of
  queue manager statistics records on each member of the QSG:
   STOP TRACE(STAT) DEST(SMF)
  
  If the queue manager might be restarted before the fix for this
  APAR is applied, include that command in a CSQINP2 member or
  set SMFSTAT=NO in CSQ6SYSP.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 7 *
  *                 Release 1 Modification 0.                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: Following the application of PTF        *
  *                      UI38191 for APAR PI60479, if a queue    *
  *                      manager in a queue sharing group is     *
  *                      collecting SMF statistics, various      *
  *                      abends may be seen when a unit of work  *
  *                      containing a large number of shared     *
  *                      queue requests is backed out,           *
  *                      e.g:                                    *
  *                      Abend 5C6-00E60092 in CSQWVZD1,         *
  *                      Abend 5C6-00E20001 in CSQSVBK,          *
  *                      Abend 0C4-00000004 in CSQWVAPR,         *
  *                      Abend 0C4-00000011 in CSQWVZSS,         *
  *                      Abend 0C4-00000004 in CSQWVSMT          *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  When managing the back out of a unit of work containing a large
  number of shared queue requests, CSQESYNC processes past the
  end of an array, resulting in a bit being incorrectly turned on
  in the IIDT control block.
  Later, during the processing of SMF records, the incorrect
  value in the IIDT leads to the abends seen.
  

Problem conclusion

• Code has been changed in CSQESYNC to correctly set the array
  size and so prevent the storage overlay that led to the abends.
  100Y
  CSQESYNC
  

Temporary fix

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

Comments

APAR Information

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

  PI71097

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

  UI42767

Modules/Macros

• CSQESYNC
  

Fix information

• Fixed component name

  WMQ Z/OS V7

• Fixed component ID

  5655R3600

Applicable component levels

• R100 PSY UI42767

     UP16/12/08 P F612 ­

Fix is available

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