PM72042: LOCAL AFFINITY SET BY EXIT DFSMSCE0 IS IGNORED FOR OTMA-ENTERED CONVERSATIONAL TRANSACTIONS WITH SMQ ENABLEMENT (AOS=Y) ACTIVE.

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APAR status

  • Closed as program error.

Error description

  • The DFSMSCE0 exit is used to force local processing based on the
    transaction class. This works fine for all but OTMA-entered
    conversational transactions running in an environment with OTMA
    SMQ Enablement active (AOS=Y). The tranaction ends up processing
    on another IMS in the shared queues group and gets cancelled. It
    appears that the MSTR2LSQ bit set by DFSMSCE0 is ignored in this
    case.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All IMS V11 users with OTMA, SMQ enablement  *
    *                 (AOS=Y) active, and local affinity set by    *
    *                 the DFSMSCE0 exit.                           *
    ****************************************************************
    * PROBLEM DESCRIPTION: When local affinity is set by the exit  *
    *                      DFSMSCE0, it is ignored for OTMA        *
    *                      entered conversational transactions     *
    *                      with SMQ enablement (AOS=Y) active.     *
    *                                                              *
    ****************************************************************
    * RECOMMENDATION: INSTALL CORRECTIVE SERVICE FOR APAR/PTF      *
    ****************************************************************
    When the MSTR2LSQ bit is set by DFSMSCE0 to indicate local
    affinity processing for OTMA conversational transactions running
    with OTMA SMQ Enablement active (AOS=Y), the local bit is
    ignored.  Since, the message does not have local affinity,
    another system in the shared queues group processes the message
    and ends up discarding the message.
    
    On the first iteration of the conversation, OTMA fails to set
    CLBV9LOC.  CLBV9LOC informs queue manager to append the IMSID to
    the queue name which forces local affinity on the message.
    
    On subsequent iterations of the conversation, IMS currently does
    not call DFSMSCE0, therefore, there is not an option to set
    local affinity.  This will be addressed by requirement
    MR0906126151.
    
    In the meantime, IMS should set local affinity for OTMA
    conversational messages based on the decision made by the
    DFSMSCE0 exit called on the first iteration.  Therefore, if
    DFSMSCE0 elects to run the conversational transaction local, all
    subsequent iterations will run locally even deferred program
    switches.
    
    Also, when DFSMSCE0 specifies that the OTMA conversation
    transaction is to run on a back-end system by setting the bit
    Mscec_BEroute, all conversational iterations should have
    affinity to the specified system.
    

Problem conclusion

  • GEN:
    KEYWORDS:
     SYSPLEXSQ
    
    *** END IMS KEYWORDS ***
    DFSMSCE0 will determine if all iterations for OTMA
    conversational messages will run with local affinity.  Once
    the decision is made, all iterations for the OTMA conversation
    will run locally.  The same will hold true when DFSMSCE0 sets
    bit Mscec_BEroute to have OTMA conversations run on a specific
    back-end system.
    
    DFSYTIB has been modified to define YTIB_MSCEC_LOCAL to indicate
    that local affinity has been set by DFSMSCE0.  This bit will be
    used to indicate that all conversation iterations will use the
    affinity specified by DFSMSCE0.
    
    DFSYTIB0 has been modified as follows:
    - Ytib_Mscec_Local is set when DFSMSCE0 indicates that the
      conversational transaction is to be processed locally.  This
      flag will be set to allow subsequent conversation iterations
      to be processed with local affinity.
    
    - Set CLBVFLG9 if DFSMSCE0 indicates that the conversational
      transaction is to have local affinity.
    
    - Set CCBAFFIN from MSCEBAFIN if the transaction is to
      run a backend system (Mscec_BEroute).  This will allow all
      the conversational iterations to run on the specific backend
      system.
    
    DFSAOAM2 and DFSAOA00 have been re-compiled for the DFSYTIB
    changes.
    
    ICLI has been modified to add the following field for BE
    processing.
    - CCBAFFIN has been defined to indicate the system where
      affinity is attached.
    - Note that the offset of the field CCBSRPST has changed.
    
    DFSQC050 has been modified to determine if CCBAFFIN is
    available.  If CCBAFFIN is available, it will be moved into the
    shared queues prefix.  This will allow iterations other than the
    first to be processed with affinitly to that system.
    
    DFSCRPX0 and DFSCRPQ0 have been re-compiled for the ICLI
    changes.
    

Temporary fix

  • *********
    * HIPER *
    *********
    

Comments

APAR Information

  • APAR number

    PM72042

  • Reported component name

    IMS V11

  • Reported component ID

    5635A0200

  • Reported release

    100

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    YesHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-08-31

  • Closed date

    2013-01-31

  • Last modified date

    2013-03-04

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

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

    PM79758 PM79759 UK91317 UK91318

Modules/Macros

  •    DFSAOAM2 DFSAOA00 DFSCRPQ0 DFSCRPX0 DFSQC050
    DFSYTIB  DFSYTIB0 ICLI
    

Fix information

  • Fixed component name

    IMS V11

  • Fixed component ID

    5635A0200

Applicable component levels

  • R100 PSY UK91317

       UP13/02/07 P F302

  • R102 PSY UK91318

       UP13/02/07 P F302

Fix is available

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Document information


More support for:

IMS

Software version:

100

Reference #:

PM72042

Modified date:

2013-03-04

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