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PI98859: IBM MQ V900 ABEND0C4 READING LOG RECORDS BACKWARDS SMALL WINDOW

A fix is available

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APAR status

  • Closed as program error.

Error description

  • Additional Symptom(s) Search Keyword(s):
    IBM MQ V900  We can see that this abend is a good match for an
    internal defect with identical symptoms that we've
    fixed very recently. The problem happens during abort
    processing when reading log records backwards and is a small
    timing windows where we clear our log properties block prior to
    resetting the LCIDLRBA field.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All users of IBM MQ for z/OS Version 9       *
    *                 Release 0 Modification 0.                    *
    ****************************************************************
    * PROBLEM DESCRIPTION: S0C4-00000004 abend has been reported   *
    *                      in CSQJL002.CSQJR103.                   *
    ****************************************************************
    If a unit of work is aborted during a specific window of the log
    write code then a 0C4 abend can be produced as part of reading
    the log backwards.
    

Problem conclusion

  • The window in the log write code has been removed preventing
    this specific 0C4 from occurring.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PI98859

  • Reported component name

    IBM MQ Z/OS V9

  • Reported component ID

    5655MQ900

  • Reported release

    000

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    YesHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2018-06-06

  • Closed date

    2019-09-26

  • Last modified date

    2019-11-01

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

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

    PH17172 UI65535

Modules/Macros

  • CSQJR103 CSQJW001 CSQJWE01
    

Fix information

  • Fixed component name

    IBM MQ Z/OS V9

  • Fixed component ID

    5655MQ900

Applicable component levels

  • R000 PSY UI65535

       UP19/10/29 P F910 ¢

Fix is available

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Document Information

Modified date:
01 November 2019