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PI66708: WMQ ABEND5C6 00C90F00 CSQIMGEF OFFSET +00002A9A

A fix is available

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APAR status

  • Closed as program error.

Error description

  • Change Team finds there is a window in which an MQGET browse for
    message with a specific MsgId on an indexed queue can locate a
    matching message, only for destructive MQGET using
    MQGMO_MSG_UNDER_CURSOR to take the message from underneath it.
    This results in an 5C6-00C90F00 abend issued by CSQIMGEF.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * All users of IBM MQ for z/OS Version 9 Release 0             *
    * Modification 0.                                              *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * Abend 5C6-00C90F00 occurs in CSQIMGEF or CSQIMGEG when       *
    * attempting to browse messages on an indexed queue.           *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * None                                                         *
    ****************************************************************
    During a browse matching on Correlation ID, Message ID, of Group
    ID on an indexed queue, a matching message is located using the
    index. However, while validating that the message is in a
    suitable state to be returned it is deleted by another task
    getting from the same queue.
    CSQIMGEF and CSQIMGEG should expect this to be possible, however
    there is a timing window where these routines do not allow for
    the possibility of this happening, leading to the reported abend
    being issued.
    

Problem conclusion

  • CSQIMGEF and CSQIMGEG are changed to correctly handle the
    message being processed having been deleted by another task, and
    carry on searching for another matching message instead of
    abending.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PI66708

  • Reported component name

    MQ Z/OS V9

  • Reported component ID

    5655MQ900

  • Reported release

    000

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2016-07-29

  • Closed date

    2016-12-22

  • Last modified date

    2017-03-02

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

    PI56882

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

    UI43781

Modules/Macros

  • CSQIMGEF CSQIMGEG
    

Fix information

  • Fixed component name

    MQ Z/OS V9

  • Fixed component ID

    5655MQ900

Applicable component levels

  • R000 PSY UI43781

       UP17/02/08 P F702

Fix is available

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Document Information

Modified date:
02 March 2017