PM78122: QMGR ABNORMALLY TERMINATES UPON RESTART WITH ABEND5C6 00C90600 CSQIREDO +000005C6 ABNORMAL TERMINATION REASON 00D96001

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• QMGR terminates at restart with ABEND5C6 00C90600 in CSQIREDO +
  000005C6 while attempting log recovery. The QMGR is unable to
  locate the referenced IRH.
  Level 3 determined that updates to page set 0 were not always
  being committed from the buffer pool to the page set dataset
  when CLEAR QLOCAL or DELETE QLOCAL PURGE or MQCLOSE with
  MQCO_DELETE_PURGE were issued. This was the case if more than
  10,000 nonpersistent messages existed on the queue and the QMGR
  was subsequently terminated abnormally (including if by CANCEL).
  

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: If a queue containing more than 10,000  *
  *                      non-persistent messages is cleared      *
  *                      using CLEAR QLOCAL or DELETE QLOCAL     *
  *                      PURGE command while checkpoint          *
  *                      processing is occurring and the queue   *
  *                      manager subsequently terminates         *
  *                      abnormally, then the queue manager may  *
  *                      fail to restart, issuing abend          *
  *                      5C6-00C90600 from CSQIREDO. The queue   *
  *                      manager will subsequently terminate     *
  *                      issuing message CSQV086E with           *
  *                      REASON=00D96001.                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  When clearing a queue with more than 10,000 non-persistent
  messages, the page containing the queue definition may not be
  correctly updated. If a checkpoint is taken while the clear
  operation is ongoing, the deferred write processor may remove
  the page from the deferred-write chain without updating the page
  set. The page remains in the buffer pool and will be flushed out
  if there are further updates or if the queue manager shuts down
  cleanly but if the queue manager abends then the page will be
  left in an inconsistent state and recovery will fail at restart
  time.
  
  In addition, if the above problem occurs it might not result in
  an abend at restart, but might manifest itself as a queue that
  is no longer defined.
  

Problem conclusion

• Processing has been amended to ensure that the page containing
  the queue definition is always written correctly.
  010Y
  100Y
  CSQIDEL3
  CSQIMGE3
  

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:

  UK92016 UK92017

Modules/Macros

• CSQIDEL3 CSQIMGE3
  

Fix information

• Fixed component name

  WMQ Z/OS V7

• Fixed component ID

  5655R3600

Applicable component levels

• R010 PSY UK92016

     UP13/04/04 P F304 Ž

• R100 PSY UK92017

     UP13/04/04 P F304 Ž

Fix is available

• Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.