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PM77473: WMQ Z/OS: ABEND0C4 IN CSQXRMSS+024F2 FOR A SVRCONN CHANNEL

A fix is available

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APAR status

  • Closed as program error.

Error description

  • CHIN LOG:
    CSQX112E CSQXDISP Dispatcher process error, TCB=nnnnnnnn
    reason=0C4000-00000011
    .
    DUMP TITLE:
    ssid,ABN=0C4-00000011,C=R3600.710.CHIN,M=CSQXDISP,LOC=CSQXRCTL.
    CSQXRMSS+024F2
    .
    The failing instruction is 91FF E000 in rriFreeSess (CSQXRMSS)
    with storage for R14 not available.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 7 *
    *                 Release 1 Modification 0.                    *
    ****************************************************************
    * PROBLEM DESCRIPTION: Abend 0C4 occurs in CSQXRMSS or         *
    *                      CSQXRERR when a client channel ends.    *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    When the last conversation running on a multiplexed svrconn
    channel ends, rriAsyncConvControl is called to clean up control
    blocks associated with the channel.
    This routine incorrectly attempts to locate the rrxChannel using
    a pointer in the session, however this pointer is invalid and
    the storage it points to has already been freed. This can lead
    to the reported abend if the storage address is not accessible.
    

Problem conclusion

  • rriAsyncConvControl is changed to no longer reference the
    rrxChannel using the pointer in the session. In addition,
    rriCopySess is changed to prevent the address of the storage
    being copied in to other sessions prior to the storage being
    freed.
    100Y
    CSQXRMAS
    CSQXRMSS
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM77473

  • Reported component name

    WMQ Z/OS V7

  • Reported component ID

    5655R3600

  • Reported release

    100

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2012-11-20

  • Closed date

    2013-02-26

  • Last modified date

    2013-05-06

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

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

    UK92010

Modules/Macros

  • CSQXRMAS CSQXRMSS
    

Fix information

  • Fixed component name

    WMQ Z/OS V7

  • Fixed component ID

    5655R3600

Applicable component levels

  • R100 PSY UK92010

       UP13/04/04 P F304

Fix is available

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Document Information

Modified date:
06 May 2013