PH62085: ABN=0C4-00000011,LOC=CSQXRCTL.CSQXRRMF

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• The abend occurred in rrmReallocMsgs while attempting to do
  message reallocation. The channel went to open the
  SYSTEM.CLUSTER.TRANSMIT.QUEUE (SCTQ), but this failed with
  MQRC_OBJECT_IN_USE, because channel XYZ had the queue open
  with MQOO_INPUT_EXCLUSIVE and was in the process of
  getting a message.
  
  The subsequent error handling for MQRC_OBJECT_IN_USE references
  the rrmCLUSWORK, but this abends as one was not provided as
  only the repository manager task will have one of these control
  blocks.
  
  This problem can also occur if the SCTQ is defined as NOSHARE
  and multiple CLUSSDR channels try to open the queue for input.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of IBM MQ for z/OS Version 9       *
  *                 Release 2 Modification 0,                    *
  *                 Release 3 Modification 0 and                 *
  *                 Release 4 Modification 0.                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: When performing message reallocation,   *
  *                      if the channel's cluster transmission   *
  *                      queue is in use or, if it has           *
  *                      been set to NOSHARE and multiple        *
  *                      channels try to open the queue for      *
  *                      input, an abend 0C4 occurs.             *
  ****************************************************************
  The code that manages a channel's message reallocation triggers
  the abend due to a wrong dereferencing of a null pointer's
  member when handling the MQRC_OBJECT_IN_USE error.
  

Problem conclusion

• The code has been updated to use the correct reference when
  handling the MQRC_OBJECT_IN_USE error. As a result, if the
  channel's cluster transmission queue is in use, CSQX036E and
  MQRC 2042 MQRC_OBJECT_IN_USE are issued.
  

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:

  UI98684 UI98685 UI98686

Modules/Macros

• CSQXRRMF
  

Fix information

• Fixed component name

  IBM MQ Z/OS V9

• Fixed component ID

  5655MQ900

Applicable component levels

• R200 PSY UI98686

     UP24/11/16 P F411

• R300 PSY UI98685

     UP24/11/16 P F411

• R400 PSY UI98684

     UP24/11/16 P F411

Fix is available

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