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PH13424: BATCH APPLICATION E.G. WEBSPHERE APPLICATION SERVER, HANGS DURING EOT PROCESSING.

A fix is available

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APAR status

  • Closed as program error.

Error description

  • During EOT processing, a batch application TCB hangs in CSQMEOTC
    due to incorrectly waiting for CSQBTEXT to end.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All users of IBM MQ for z/OS Version 9       *
    *                 Release 0 Modification 0 and Release 1       *
    *                 Modification 0.                              *
    ****************************************************************
    * PROBLEM DESCRIPTION: A batch application hangs during EOT    *
    *                      (end of task) processing.               *
    *                      Until the batch application is          *
    *                      canceled, the queue manager will hang   *
    *                      during shutdown processing.             *
    ****************************************************************
    During EOT processing, CSQMEOTC canceled the STIMER that was
    established to run CSQBTEXT, and depending on the result of the
    cancel attempt, determines whether it needs to wait on
    bloa.wEndECB.
    A small timing window in timer processing can result in the
    result returned to MQ incorrectly indicating the wait is needed.
    This results in CSQMEOTC waiting on the ECB indefinitely.
    

Problem conclusion

  • CSQMEOTC is changed to no longer cancel the STIMER or wait on
    bloa.wEndECB.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PH13424

  • Reported component name

    IBM MQ Z/OS V9

  • Reported component ID

    5655MQ900

  • Reported release

    000

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2019-06-17

  • Closed date

    2019-10-30

  • Last modified date

    2019-11-30

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

    PH13423

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

    UI66152 UI66153

Modules/Macros

  • CSQMEOTC
    

Fix information

  • Fixed component name

    IBM MQ Z/OS V9

  • Fixed component ID

    5655MQ900

Applicable component levels

  • R000 PSY UI66152

       UP19/11/27 P F911

  • R100 PSY UI66153

       UP19/11/27 P F911

Fix is available

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Document Information

Modified date:
30 November 2019