PM75949: ABEND0C4 - 00000010 CMQXRLUF +03A5A

A fix is available

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APAR status

  • Closed as program error.

Error description

  • ABEND0C4 in CMQXRLUF +03A5A occurs followed by messages in
    joblog; ie. +CSQX112E CSQXDISP Dispatcher process error,
    ,TCB=tcbaddr reason=0C4000-00000010
    +CSQX599E CSQXRESP Channel channel_name ended abnormally
    +CSQX053E CSQXFFST Error information recorded in CSQSNAP data
    set
    
    The problem occurs when an XA CLOSE is received
    while the thread still has some queue handles open.
    In this situation, the handles are not closed, and
    when the thread control blocks (ACE) get reused it
    may try and post an ECB associated with the handle
    from the old thread.
    

Local fix

  • N/A
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All users of WebSphere MQ for z/OS Version7  *
    *                 Release 1 Modification 0                     *
    ****************************************************************
    * PROBLEM DESCRIPTION: Abend 0C4 in CMQXRLUF when an XA_CLOSE  *
    *                      is issued for a thread which still has  *
    *                      open handles.                           *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    Issuing an XA_CLOSE will no longer cause CSQVDLC to be invoked
    in order to deallocate the thread's resources in CSQMCPRH.
    Subsequently the ACE is put on the MCLB freechain ready to
    be reused. When the ACE gets reallocated CSQM1P1W might
    be issued to post its ECB, which will be associated with the
    old thread's handle. If the associated storage has been
    reused then various abends may occur.
    

Problem conclusion

  • CSQMCPRH has been changed to issue a CSQVDLC on the thread
    in response to an XA_CLOSE command, freeing up its resources.
    100Y
    CSQMCPRH
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM75949

  • Reported component name

    WMQ Z/OS V7

  • Reported component ID

    5655R3600

  • Reported release

    100

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-10-26

  • Closed date

    2013-02-06

  • Last modified date

    2013-03-04

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

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

    UK91446

Modules/Macros

  • CSQMCPRH
    

Fix information

  • Fixed component name

    WMQ Z/OS V7

  • Fixed component ID

    5655R3600

Applicable component levels

  • R100 PSY UK91446

       UP13/03/01 P F302

Fix is available

  • Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.



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Document information


More support for:

z/OS family

Software version:

7.1

Reference #:

PM75949

Modified date:

2013-03-04

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