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PH26266: DUPLICATE RECORDS FOR MQ ACCT(3) SMF 116 WHEN A THREAD HAS MORE THEN 9 QUEUES

A fix is available

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APAR status

  • Closed as program error.

Error description

  • when a thread uses more than 9 queues in an interval, some of
    those queues will appear twice in the threads 116 ½ data for
    that interval.
    All the data elements  (GET counts, PUT counts, elapsed, etc)
    are the same, there are just two WQST DSECTs for the same queue
    for the same interval for the same thread.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All users of IBM MQ for z/OS Version 9       *
    *                 Release 0 Modification 0, Release 1          *
    *                 Modification 0 and Release 2 Modification 0. *
    ****************************************************************
    * PROBLEM DESCRIPTION: When MQ accesses more than 9 queues     *
    *                      some of the WQ blocks for the           *
    *                      application queues in the SMF data      *
    *                      are duplicated once formatted.          *
    ****************************************************************
    The code that deals with the SMF data was duplicating the
    records. When the SMF buffer is full and we have written out the
    current block the pointer doesn't get moved onto the next
    block. This causes some of the WQ blocks for the application
    queues to be repeated.
    

Problem conclusion

  • The code has been changed so SMF records are no longer
    duplicated when MQ accesses more than 9 queues.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PH26266

  • 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

    2020-06-09

  • Closed date

    2020-11-04

  • Last modified date

    2021-01-04

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

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

    UI71182 UI71183 UI72383

Modules/Macros

  • CSQ7PLRT
    

Fix information

  • Fixed component name

    IBM MQ Z/OS V9

  • Fixed component ID

    5655MQ900

Applicable component levels

  • R200 PSY UI72383

       UP20/12/07 P F012

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.

[{"Line of Business":{"code":"LOB36","label":"IBM Automation"},"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSYHRD","label":"IBM MQ"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"9.0"}]

Document Information

Modified date:
05 January 2021