PI88885: 5C6-00D10341 issued from CSQJR103 during disaster recovery with striped active log dataset

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• ABN=5C6-00D10341,U=SYSOPR,C=RLMC-CSQJLGR,
  M=CSQJRE01,LOC=CSQJL002.CSQJR103
   When using striped active logs, it is possible that the rewrite
  of a CI does not get mirrored, although the write of the next CI
  is mirrored (same situation as DB2 APAR PI10353/PI15425),
  resulting in the 5C6-00D10341 abend issued by CSQJR103.
  

Local fix

• Use CSQ1LOGP to determine if the log copy 2 dataset ends at a
  higher RBA than the corresponding log copy 1 dataset. If so,
  copy the log copy 2 dataset over the log copy 1 dataset.
  
  An indication that a log dataset is missing the rewrite of a CI
  is given by the following message towards the end of the
  CSQ1LOGP output:
  
  CSQ1216E LOG READ ERROR, RETCODE=00000004 REASON CODE=00D10063,
           RBA=xxxxxxxxxxxx
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 7 *
  *                 Release 1 Modification 0.                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: Abend 5C6-00D10341 is issued by         *
  *                      CSQJR103 during queue manager restart,  *
  *                      or when reading a peer queue managers   *
  *                      logs, following abnormal queue manager  *
  *                      termination, or when using a mirrored   *
  *                      copy of the logs.                       *
  *                      The abend is followed by abnormal       *
  *                      queue manager termination 6C6.          *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  During queue manager startup, log replay detected the
  continuation of a spanned log record without the expected
  initial segment, leading to the queue manager abending
  5C6-00D10341, followed by abnormal queue manager termination 6C6
  with REASON=00D96001.
  
  This situation can occur following abnormal queue manager
  termination, or when starting the queue manager using mirrored
  logs, if the abnormal termination or mirroring operation
  occurred:
  - while writing the last CI to the logs, if the IO operation
    has completed for logcopy2, but not for logcopy1.
  - while writing multiple CI's to the logs, if the logs are
    striped.
  
  Similarly, when reading the logs of a peer queue manager that
  are missing the rewrite of a CI (for example, during peer admin
  rebuild, or groupur processing for an inactive queue manager)
  CSQJR103 abends and the queue manager reading the logs
  terminates.
  

Problem conclusion

• CSQJW009 has been changed to detect when the last CI contains
  more data in one logcopy than is contained in the other logcopy,
  and to truncate the shorter log prior to the last CI.
  
  CSQJW009 is also changed to perform additional validation of
  striped active logs when locating the end RBA of the logs.
  If this results in a difference between the end RBA of logcopy1
  and logcopy2, the shorter log, containing the missed CI, is
  truncated to ensure the CI is read from the other logcopy.
  
  CSQJR103 is changed to handle a missed CI when reading the
  active logs for a failed peer.
  100Y
  CSQJR103
  CSQJW009
  

Temporary fix

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

Comments

APAR Information

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

  PI77705

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

  UI52838

Modules/Macros

• CSQJR103 CSQJW009
  

Fix information

• Fixed component name

  WMQ Z/OS V7

• Fixed component ID

  5655R3600

Applicable component levels

• R100 PSY UI52838

     UP18/01/06 P F801 ¢

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.