OA41783: ABEND 0C4 IN ISTAUCTM

A fix is available

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APAR status

  • Closed as program error.

Error description

  • Abend 0C4 in ISTAUCTM in segment SET
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All using Enterprise Extender connections.   *
    ****************************************************************
    * PROBLEM DESCRIPTION: ABEND0C4 occurs in ISTAUCTM             *
    *                      while processing an EE liveness         *
    *                      timer SET invocation.                   *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    The problem is summarized as follows:
    
    1) The EE timer processing module, ISTAUCTM, was dispatched
       and scheduled lines for liveness processing.
    2) Each line dispatched and sent a Test LDLC command to
       the partner.  The liveness (TL) timer is cancelled and
       the retry (T1) timer is set.
    3) No responses from the EE partners arrive before the
       EE timer module runs again (approximately 500 ms later).
    4) ISTAUCTM was dispatched again, and removed all of the
       liveness timers that were cancelled from the liveness
       queue.
    5) Subsequently, a new liveness timer was being set for
       a new connection.
    6) An ABEND0C4 occurs in the SET routine of module
       ISTAUCTM.  This occurs because the next liveness (HTMBK)
       to process on the liveness queue has an unexpected NULL
       (previous) timer chain pointer.
    

Problem conclusion

  • ISTAUCTM - The SET routine has been corrected to handle
               this timing scenario.
    

Temporary fix

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

Comments

APAR Information

  • APAR number

    OA41783

  • Reported component name

    VTAM V4 MVS/ESA

  • Reported component ID

    569511701

  • Reported release

    1D0

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    YesHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-03-27

  • Closed date

    2013-04-18

  • Last modified date

    2013-05-03

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

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

    UA68851 UA68852 OA42088

Modules/Macros

  • ISTAUCTM
    

Fix information

  • Fixed component name

    VTAM V4 MVS/ESA

  • Fixed component ID

    569511701

Applicable component levels

  • R1C0 PSY UA68851

       UP13/04/27 P F304

  • R1D0 PSY UA68852

       UP13/04/27 P F304

Fix is available

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Document information


More support for:

z/OS family

Software version:

1D0

Operating system(s):

z/OS

Reference #:

OA41783

Modified date:

2013-05-03

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