PM76829: EYUCL0107E MAS ALREADY EXISTS MESSAGE POSSIBLE IF MAS TERMINATES AT SAME TIME THAT CMAS INITIALIZES

A fix is available

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APAR status

  • Closed as program error.

Error description

  • You shut down a CICS MAS region at the same time you start up a
    CMAS. Because of the way CPSM ships network topology around when
    a CMAS is coming into the network, there is a situation where
    some CMASes may incorrectly end up having MASDIR records
    indicating that a MAS is active while other CMASes do not. The
    MAS in this case is not actually active or connected to any CMAS
    in the network. When the MAS does try to connect to one of the
    CMASes that thinks it is already active, it will incorrectly
    receive an EYUCL0107E message stating that the MAS is already
    active.
    .
    Additional Keywords/Symptoms
    KIXREVSVR
    

Local fix

  • Recycle the CMAS where the MAS in question last connected. This
    should clear up residual MASDIR elements.
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All CICSPlex SM V4R1M0 and V4R2M0 Users      *
    ****************************************************************
    * PROBLEM DESCRIPTION: When a MAS is terminating while a CMAS  *
    *                      is connecting into the network, that    *
    *                      CMAS and other CMASes in the network    *
    *                      may attempt to Topology Join the MAS    *
    *                      after it has already terminated.  This  *
    *                      will result in the MAS not being        *
    *                      connected or joined to the CMASes when  *
    *                      it is restarted.                        *
    ****************************************************************
    * RECOMMENDATION: After applying the PTF that resolves this    *
    *                 APAR, all CMASes must be restarted.  Note    *
    *                 that the restarts do not need to occur at    *
    *                 the same time.                               *
    ****************************************************************
    When a MAS Topology Joins to a CMAS, the joining CMAS checks the
    signatures of the CICS resource maps for the MAS.  If the
    signatures provided by the connecting CMAS do not match the
    joining CMASes current signatures, then the joining CMAS sends
    requests for methods EYU0TSLG (TSLG) and EYU0TSG2 (TSG2) to run
    in the CMAS to which the MAS connected, to retrieve the latest
    versions of the CICS resource maps for the MAS.  If the MAS has
    terminated by the time TSLG and TSG2, run the connecting CMAS
    will fail the request.  This failure will be returned to the
    joining CMAS, which will fail the Topology Join.
    
    However, if the signatures of the CICS resource maps match, the
    joining CMAS does not send the TSLG and TSG2 requests, and as a
    result, will not be alerted by the connecting CMAS that the MAS
    has already terminated.
    

Problem conclusion

  • Method EYU0TSMJ (TSMJ), which sends the TSLG and TSG2 requests
    from the joining CMAS to the connecting CMAS, has been updated
    to send a dummy TSLG request to the connecting CMAS if the CICS
    resource maps for a MAS match.  This will ensure that the
    joining CMAS will be alerted if a MAS that it is trying to join
    is no longer active.
    

Temporary fix

  •             *********
                * HIPER *
                *********
    FIX AVAILABLE BY PTF ONLY
    

Comments

APAR Information

  • APAR number

    PM76829

  • Reported component name

    CICS TS Z/OS V4

  • Reported component ID

    5655S9700

  • Reported release

    60M

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    YesHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-11-09

  • Closed date

    2012-11-15

  • Last modified date

    2012-12-04

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

    PM76575

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

    UK83535 UK83536 PM77762

Modules/Macros

  •    EYU0TSLG EYU0TSMJ EYU9TSRU EYU9TSR3 EYU9TSR4
    

Fix information

  • Fixed component name

    CICS TS Z/OS V4

  • Fixed component ID

    5655S9700

Applicable component levels

  • R60M PSY UK83535

       UP12/11/17 P F211

  • R70M PSY UK83536

       UP12/11/17 P F211

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.



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Document information


More support for:

CICS Transaction Server

Software version:

4.1

Reference #:

PM76829

Modified date:

2012-12-04

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