PH65886: ABN= 0C4-00000004,C=MQ900.940.CHIN,M=CSQXESTX,LOC=CSQXRCTL.CSQXRFXC+OFFSET

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• The S0C4 abend occurs in rfxAddCLQ when a clustered queue is
  defined multiple times in the cluster but with different
  QSGDISP. The problem occurs due to incorrect parameter passing
  in function rrmQSGCoexistence. Note that the same problem can
  also occur in rfxAddCLT for topics, in which case the CSQXRFXC
  abend offset will be different.
  
  Additional symptom:
  
  ABN= 0C4-00000004,C=MQ900.940.CHIN,M=CSQXESTX,LOC=CSQXRCTL.CMQX
  RECO+offset
  

Local fix

• Ensure that different queue definition's in a cluster do not
  share the same name to prevent this issue from occuring.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of IBM MQ for z/OS Version 9       *
  *                 Release 4 Modification 0                     *
  ****************************************************************
  * PROBLEM DESCRIPTION: When queue managers are part of both a  *
  *                      queue sharing group (QSG) and a cluster *
  *                      defining a queue with the same name     *
  *                      but different QSG disposition values    *
  *                      can lead to a 0C4 abend in the CMQXRECO *
  *                      module.                                 *
  ****************************************************************
  When two queue managers exist in the same cluster and queue
  sharing group, an attempt to define a shared clustered queue
  with the same name as a non-shared clustered queue will result
  in a co-existence issue which is incorrectly checked for by MQ,
  resulting in an 0C4 abend.
  

Problem conclusion

• The code has been corrected to avoid the 0C4 abend. The shared
  queue definition is propagated across the cluster, resulting in
  two definitions for the same queue on the receiving
  queue manager.
  Which matches the behaviour seen before in IBM MQ for z/OS
  Version 9 Release 3 Modification 0.
  

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:

  UO02824

Modules/Macros

• CMQXRECO
  

Fix information

• Fixed component name

  IBM MQ Z/OS V9

• Fixed component ID

  5655MQ900

Applicable component levels

• R400 PSY UO02824

     UP25/05/01 P F504

Fix is available

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