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PM84335: DFHTM1781 CICS SHUTDOWN CANNOT COMPLETE BECAUSE SOME NON-SYSTEM USER TASKS HAVE NOT TERMINATED.

A fix is available

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APAR status

  • Closed as program error.

Error description

  • CICS shutdown does not complete in a clean way with WMQ CKAM
    transaction still active.
    CICS was started and a PLT Program tries to connect to MQ but
    the QUEUE MANAGER is not active at this time.
    The adapter is awaiting the initialization of MQ now.
    If WMQ does not become avaiable and a CICS shutdown is
    performed, the shutdown could not complete in a clean way
    because the CKAM transaction is still active.
    The dump shows that the CKAM transaction has issued
    an E.C. WAIT EXTERNAL while MQ was not available and
    is suspended since that time.
    CKAM is defined with SYSTEM PURGABLE=NO, so the shutdown
    assist program DFHCESD issues a forcepurge against
    CKAM. This prevents CICS from a claen shutdown and
    the message DFHRM0130 does not appear.
    

Local fix

  • *
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All CICS users                               *
    ****************************************************************
    * PROBLEM DESCRIPTION: A CICS system which normally connects   *
    *                      to a WMQ Queue Manager will not close   *
    *                      down if the Queue Manager is            *
    *                      unavailable when the CICS region starts *
    *                      up and remains unavailable for the      *
    *                      duration of that CICS session.          *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    A CICS region which usually connects to a WMQ Queue Manager will
    not shut down if the Queue Manager remains unavailable for the
    duration of the CICS session. This is because the CICS/WMQ
    monitor task CKAM will never get posted in this situation.
    The result of this is that the CESD transaction will force purge
    the CKAM monitor task. Therefore, a warm keypoint is not taken
    for this region, forcing the user to perform an emergency
    restart.
    Keywords: msgDFHTM1781 msgTM1781 DFHTM1781
    

Problem conclusion

  • DFHSTP has been changed to set the CICS/WMQ MQCONN connection to
    NOTCONNECTED during shutdown if it is in a state of CONNECTING.
    

Temporary fix

  • FIX AVAILABLE BY PTF ONLY
    

Comments

APAR Information

  • APAR number

    PM84335

  • Reported component name

    CICS TS Z/OS V4

  • Reported component ID

    5655S9700

  • Reported release

    600

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    YesSpecatt / Pervasive

  • Submitted date

    2013-03-07

  • Closed date

    2013-07-04

  • Last modified date

    2013-08-02

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

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

    PM91658 UK95615 UK95616

Modules/Macros

  •    DFHSTP
    

Fix information

  • Fixed component name

    CICS TS Z/OS V4

  • Fixed component ID

    5655S9700

Applicable component levels

  • R600 PSY UK95615

       UP13/07/13 P F307

  • R700 PSY UK95616

       UP13/07/13 P F307

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

Modified date:
02 August 2013