PI77599: MQ V8: ABEND0C4 IN CSQMFDER+00000738 OR ABEND0C4 IN CSQMFREG+00000A08 USING MQ CLUSTER.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• An ABEND0C4 in CSQMFDER +00000738 or an ABEND0C4 in CSQMFREG
  +00000A08 may occur due to a cluster cache corruption.
  
  PIDS/5655W9700 RIDS/CSQMLPLM#L RIDS/CSQMFDER AB/S00C4
  PRCS/00000004
  REGS/C05C0  RIDS/CSQGFRCV#R
  
    Symptom             Description
    -------             -----------
    PIDS/5655W9700      Program id: 5655W9700
    RIDS/CSQMLPLM#L     Load module name: CSQMLPLM
    RIDS/CSQMFDER       Csect name: CSQMFDER
    AB/S00C4            System abend code: 00C4
    PRCS/00000004       Abend reason code: 00000004
    REGS/C05C0          Register/PSW difference for R0C:-05C0
    RIDS/CSQGFRCV#R     Recovery routine csect name: CSQGFRCV
  

Local fix

• n/a
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 8 *
  *                 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.                               *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  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.
  000Y
  CSQIRECP
  CSQMFDER
  CSQMOVAL
  CSQMPUTV
  CSQMZLOO
  

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:

  PI77804 UI46361

Modules/Macros

• CSQIRECP CSQMFDER CSQMOVAL CSQMPUTV CSQMZLOO
  

Fix information

• Fixed component name

  WMQ Z/OS 8

• Fixed component ID

  5655W9700

Applicable component levels

• R000 PSY UI46361

     UP17/06/06 P F706

Fix is available

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