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IT25671: CODE CHANGE FOR RECORDED OBJECT REFRESH METADATA USED IN MASTER TO SLAVES SYNCHRONIZATION.

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • Errors AMQ9511 and AMQ9448 are logged along with FFST
    regarding ProbeID: RM220005 and Probe Type: MSGAMQ9511
    given by one or more slave repmans due to inconsistencies
    between CPUs regarding subscriptions in number and
    referenced object as well as expiration time.
    When multiple slaves are affected, in consequence the
    problem described in IT24388 may occur.
    This is a generic description of a multi root cause error
    scenario, please also check APARs about other problems
    identified: IT25665, IT25666, IT25669, IT25671.
    
    This APAR is about problems in maintenance to consistently
    identify objects held in use by the queue manger, which
    need to be refreshed to prevent expiry of their subscriptions.
    

Local fix

  • N/A
    

Problem summary

  • The information if an object is in use or not is kept in
    shared memory, due to this, this information differs for
    each CPU. This breaks master to slaves synchronization of
    refresh operations for objects held in use by the queue manager.
    

Problem conclusion

  • Code was changed to record information if an object was
    refreshed by the master in metadata provided along with
    the processed request to the slaves and to rely in slaves
    on this recorded information to determine if an object needs
    to be refreshed or not instead of local shared memory state.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT25671

  • Reported component name

    WEBS MQ NSS ITA

  • Reported component ID

    5724A3902

  • Reported release

    531

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2018-07-12

  • Closed date

    2018-07-13

  • Last modified date

    2018-07-13

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

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

Fix information

  • Fixed component name

    WEBS MQ NSS ITA

  • Fixed component ID

    5724A3902

Applicable component levels

  • R531 PSY

       UP

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Document Information

Modified date:
27 September 2021