PI77804: MQ V9: ABEND0C4 IN CSQMFDER OR ABEND0C4 IN CSQMFREG USING MQ CLUSTER.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• An ABEND0C4 in CSQMFDER or an ABEND0C4 in CSQMFREG may occur
  due to a cluster cache corruption.
  

Local fix

• n/a
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of IBM MQ for z/OS Version 9       *
  *                 Release 0 Modification 0.                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: When applications using                 *
  *                      MQOO_BIND_ON_GROUP or                   *
  *                      MQOO_BIND_AS_Q_DEF with DefBind queue   *
  *                      attribute as MQBND_BIND_ON_GROUP put    *
  *                      group messages to cluster queues        *
  *                      without option MQMPO_LOGICAL_ORDER      *
  *                      experience 0C4 abends in CSQMFDER or    *
  *                      CSQMFREG.                               *
  ****************************************************************
  The 0C4 abends are result of corrupted cluster cache
  registration areas. MQPUT processing is not handling
  correctly the condition of an application using
  BIND_ON_GROUP without MQPMO_LOGICAL_ORDER when putting
  group messages to cluster queues.
  In this case, the MQPUT should revert to put messages
  using BIND_NOT_FIXED as is the documented behaviour instead
  of trying to use BIND_ON_GROUP causing the cluster cache
  corruption.
  

Problem conclusion

• CSQMPUTV has been changed to handle putting group messages to
  cluster queues using BIND_ON_GROUP without MQPMO_LOGICAL_ORDER
  and correctly reverting to BIND_NOT_FIXED without corrupting
  cluster cache registration areas.
  
  CSQMFDER has been changed to implement a new service tune
  parameter that can be enabled to check consistency of the
  cluster cache registration areas.
  
  CSQMOVAL and CSQMZLOO have been changed to implement another
  service tune parameter that can be enabled to revert behaviour
  of BIND_ON_GROUP to BIND_ON_OPEN. This is can be used as
  temporary fix to applications using BIND_ON_GROUP and no
  MQPMO_LOGICAL_ORDER that can be affected by this APAR that
  reverts BIND_ON_GROUP to BIND_NOT_FIXED when MQPMO_LOGICAL_GROUP
  is not specified.
  

Temporary fix

Comments

APAR Information

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

  PI77599

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

  UI47350

Modules/Macros

• CSQIRECP CSQMFDER CSQMOVAL CSQMPUTV CSQMZLOO
  

Fix information

• Fixed component name

  MQ Z/OS V9

• Fixed component ID

  5655MQ900

Applicable component levels

• R000 PSY UI47350

     UP17/08/10 P F708

Fix is available

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