PM74273: AFTER AN IMS APPLY FAILURE IN CLASSIC IMS REPLICATION, A RESTARTED SUBSCRIPTION DID NOT RECEIVE CHANGES

A fix is available

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APAR status

  • Closed as program error.

Error description

  • After a subscription failure in which parallel apply processing
    was taking place, the subscription was restarted and then
    stopped with a controlled stop before any changes were applied.
    The log showed that in the controlled stop, the absolute
    bookmark was incorrectly pushed forward to the leading
    edge value.
    Restart information after the subscription failure:
    (in this case, caused by an IMS failure):
    02012-10-02-05.17.51.701503 RC(04), SpcRC(00007fff),
    Data(00000000,00000000)
        Node(218), Task(9208776)
        COMM,CNTL,DEBUG,BUFFER, func getBookmark, line 4972 in
    CAC.V101.RUP3.APAR.PM71548.C(AARCREPL)
        'Subscription: T1_C_APPLY2_REMDB
        'Adjusted bookmark
        'Restart : ca41fe26 4207fd0b
        'Absolute: ca41fe28 bce5f196
        'Leading : ca41fe55 66b2ff84
    Subsequent stop information:
    02012-10-02-05.24.35.226169 RC(04), SpcRC(01010070),
    Data(00000000,00000000)
        Node(218), Task(9208776)
        COMM,CNTL,DEBUG,BUFFER, func CompleteEndReplication, line
    6306 in CAC.V101.RUP3.APAR.PM71548.C(AARCREPL)
        'End of replication summary.
        'Received   :  Msgs(0); UORs(0); Bytes(0)
        'Completed  :  Inserts(0); Updates(0); Deletes(0) UORS(0)
        'Encountered:  Rollbacks(0)
        'Bookmark Information:
        '   Restart Point   ca41fe264207fd0b.
        '   Absolute Commit ca41fe5566b2ff84.
        '   Leading Edge    ca41fe5566b2ff84.
    '
    This causes any transactions during this period to be
    lost, and a 'Before image mismatch' error is issued.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: Classic IMS Replication                      *
    ****************************************************************
    * PROBLEM DESCRIPTION: Following a subscription failure during *
    *                      parallel apply processing, a            *
    *                      subscription is restarted and stopped   *
    *                      with a controlled stop before any       *
    *                      changes are applied.  At this time,     *
    *                      the absolute time is pushed             *
    *                      forward to the leading edge time,       *
    *                      resulting in transactions during this   *
    *                      period to be lost.                      *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    .
    

Problem conclusion

  • In the sequence of events described above, the absolutetime is
    incorrectly set to the leading edge time, despite existing
    transactions that have not yet been applied.  Code has been
    corrected to verify that there are no further transactions to
    be applied before pushing the absolute time forward to the
    leading edge time.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM74273

  • Reported component name

    CLASSIC FED & E

  • Reported component ID

    5697I8200

  • Reported release

    A1G

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-10-03

  • Closed date

    2012-11-15

  • Last modified date

    2012-12-04

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

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

    UK83565

Modules/Macros

  • CECCAIMS
    

Fix information

  • Fixed component name

    CLASSIC FED & E

  • Fixed component ID

    5697I8200

Applicable component levels

  • RA1G PSY UK83565

       UP12/11/28 P F211

Fix is available

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Document information


More support for:

InfoSphere Classic Federation Server for z/OS
General issues

Software version:

A1G

Reference #:

PM74273

Modified date:

2012-12-04

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