PI26328: ABEND 0C4-00000011,CHIN,M=CSQXDISP,LOC=CSQXRCTL.CSQXCRTF

Obtain the fix for this APAR.

APAR status

• Closed as unreproducible in next release.

Error description

• ABN=0C4-00000011,C=R3600.701.CHIN,M=CSQXDISP,LOC=CSQXRCTL.
  CSQXCRTF+01602
  CSQX112E MQB1 CSQXDISP Dispatcher process error, TCB=xxxxxxxx
  reason=0C4000-00000011
  
  The 0C4 abend occurs due to an invalid length calculation when
  returning a truncated message containing message properties.
   Subsequent errors that were observed are a direct consequence
  of this initial abend.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 7 *
  *                 Release 0 Modification 1.                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: Abend 0C4 occurs in CSQXRCTF or         *
  *                      CMQXRSRV when a client channel gets     *
  *                      messages containing message properties. *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  A client application gets a message containing message
  properties from the queue, specifying
  MQGMO_ACCEPT_TRUNCATED_MESSAGE.
  When the channel initiator sends the reply containing the
  message, it calls rriAddMPHToMQIReply to add the message
  properties to the reply. These are added prior to the message
  body, and consequently requires the message to be moved to
  make space for the MPH. When doing this the full message length
  is incorrectly used, even if the message was truncated.
  This causes storage beyond the end of the reply buffer to
  be overlaid, and can result in abend S0C4 if this storage is
  inaccessible, leading to the dispatcher terminating prematurely
  and consequently all channels using that dispatcher failing.
  Depending on the contents of the overlaid storage,
  unpredictable results can occur.
  

Problem conclusion

Temporary fix

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

Comments

• rriMQIServerCall is changed to pass the correct length to
  rriAddMPHToAPIReply, taking in to account any message truncation
  that has occurred.
  

APAR Information

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

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

  UI22420

Modules/Macros

• CMQXRSRV
  

Fix information

• Fixed component name

  WMQ Z/OS V7

• Fixed component ID

  5655R3600

Applicable component levels

• R010 PSY UI22420

     UP14/11/13 P F411 Ž

Fix is available

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