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PI72141: ABN=5C6-00D4007B,U=XXXXCHIN,C=W9700.800.MMC-CSQMXARH, M=CSQGFRCV,LOC=CSQMLPLM.CSQMXARH+000028EC

A fix is available

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APAR status

  • Closed as program error.

Error description

  • Customer is receiving the following abend for a client
    connection when 2 clients send a XA Rollback request for the
    same XID at the same time
    
    ABN=5C6-00D4007B,U=xxxCHIN,C=W9700.800.MMC -CSQMXARH,
      M=CSQGFRCV,LOC=CSQMLPLM.CSQMXARH+000028EC
    

Local fix

  • n/a
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 8 *
    *                 Release 0 Modification 0.                    *
    ****************************************************************
    * PROBLEM DESCRIPTION: Abend 5C6-00D4007B occurs in CSQMXARH   *
    *                      if two xa_rollback requests are         *
    *                      executed for the same XID concurrently, *
    *                      and the transaction is in a invalid     *
    *                      state for xa_rollback.                  *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    Two xa client applications attempted to issue xa_rollback for an
    XID, however the transaction was not in the correct state to be
    rolled back. The first task detects the invalid state, and backs
    out the transaction before returning XAER_PROTO (-6). The second
    task also detects the invalid state and attempts to back out the
    transaction, however the first task was still backing it out.
    The second task detects that the EB associated with the
    transaction is in use and issues the reported abend.
    

Problem conclusion

  • CSQMXARH is changed to no longer abend in this situation.
    000Y
    CSQMXARH
    

Temporary fix

Comments

APAR Information

  • APAR number

    PI72141

  • Reported component name

    WMQ Z/OS 8

  • Reported component ID

    5655W9700

  • Reported release

    000

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2016-11-11

  • Closed date

    2017-06-20

  • Last modified date

    2017-08-02

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

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

    PI81712 UI48160

Modules/Macros

  • CSQMXARH
    

Fix information

  • Fixed component name

    WMQ Z/OS 8

  • Fixed component ID

    5655W9700

Applicable component levels

  • R000 PSY UI48160

       UP17/07/25 P F707

Fix is available

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Document Information

Modified date:
02 August 2017