PI32111: WMQ Z/OS: CSQX036E "UNABLE TO OPEN QUEUE(SHARED.XMITQ) MQCC=2 MQRC=2042" AND CSQX470E "CHANNEL HAS THE WRONG DISPOSITION"

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• An environment using shared xmitqs and shared channels
  experiences the following errors after a failure and recovery
  of a Coupling Facility (CF) structure.
  
  CSQX036E CSQ1 CSQXRCTL Unable to open QUEUE(SHARED.XMITQ),
   MQCC=2 MQRC=2042 (MQRC_OBJECT_IN_USE)
  CSQX599E CSQ1 CSQXRCTL Channel CSQ1.TO.CSQ2 ended
   abnormally
  
  CSQX500I CSQ1 CSQXRCTL Channel CSQ1.TO.CSQ2 started
  CSQX470E CSQ1 CSQXRCTL Channel CSQ1.TO.CSQ2 has the wrong
   disposition
  CSQX599E CSQ1 CSQXRCTL Channel CSQ1.TO.CSQ2 ended
   abnormally
  
  The shared channel is retrying on several queue managers in the
  Queue Sharing Group (QSG) while the channel is already active
  on another queue manager in the QSG.
  
  The problem is that a non-shared channel status entry is
  created by rriQueryChannelDisp when the MQOPEN for the shared
  xmitq fails with MQRC 2345 (MQRC_CF_NOT_AVAILABLE).
  
  
  Additional Symptom(s) Search Keyword(s):
  transmission queue
  

Local fix

• Delete and redefine the channel.  This will clear the channel's
  status records from the local and shared SYNCQ queues and from
  the internal status table.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 7 *
  *                 Release 1 Modification 0.                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: The channel initiator issues message    *
  *                      CSQX470E repeatedly for a shared        *
  *                      channel after the CF is not available.  *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  When the channel was first started by a trigger message,
  riiTriggerMessage is invoked, and calls rriQueryChannelDisp to
  determine the channel disposition. The latter fails to open the
  shared transmit queue due to MQRC 2345 (MQRC_CF_NOT_AVAILABLE),
  however riiTriggerMessage does not check the return code and
  continues processing, adding a non-shared local status entry.
  This entry is used for retry processing, and when the CF is
  recovered, allowing the transmit queue to be opened again,
  channel start fails due to the channel having the wrong
  disposition, and message CSQX470E is issued.
  

Problem conclusion

• The code was changed to correctly determine the channel
  disposition even if the CF is not available, allowing the
  channel to start correctly once the CF structure is recovered.
  100Y
  CSQXRCDF
  CSQXRCSI
  

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:

  PI37473 UI26441

Modules/Macros

• CSQXRCDF CSQXRCSI
  

Fix information

• Fixed component name

  WMQ Z/OS V7

• Fixed component ID

  5655R3600

Applicable component levels

• R100 PSY UI26441

     UP15/04/30 P F504

Fix is available

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