OA40928: ABEND0C4 IN MODULE ISTDRAPC + X'4F6' AT BASE LEVEL

A fix is available

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APAR status

  • Closed as program error.

Error description

  • ABEND0C4 in module ISTDRAPC + x'4F6' at base level.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All using the Border Node function, BN=YES.  *
    ****************************************************************
    * PROBLEM DESCRIPTION:   An ABEND0C4 occurred in module        *
    *                      ISTDRAPC while activating a CPCP        *
    *                      session.                                *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    The problem may be summarized as follows:
    1. A CPCP session setup failed to a cross network NN (BN or
       non-native NN).  SSC sent a CP Status (CPS) IPS with
       ConWinner (CW) Inact to DS. DS sent a CNM RU to management
       services to remove the BN Info from the MSTBNPTR queue.
    2. The CPCP session had failed with a retryable sense code, so
       SSC started setting up a new CPCP session.  SSC sent a CPS
       IPS with CW Pending Active to DS.
    3. ISTDRAPC did a TPADDEL LIFO to add new BN Info to the end of
       the MSTBNPTR queue.
    4. While this was processing, ISTMGCVG issued a TPREMEL to
       remove the old BN Info from the MSTBNPTR queue for step 1.
       This was the last piece of BN Info on the page, so the
       page of storage was freed.
    5. Unfortunately, the TPADDEL from step 3 had loaded the address
       of the old BN Info prior to it being removed for the chain,
       so ISTDRAPC abended trying to use the freed storage.
    

Problem conclusion

  • ISTDRAPC and ISTMGCVG have been changed to issue a TPLOCK to
    lock the MSTBNPTR queue prior to adding or removing elements
    from the queue.
    
      To do this a new lock was added to ISTMSTAT.  Also, ISTLOK,
    TPLOCK, and TPUNLOCK were updated to recognize the new lock.
    

Temporary fix

Comments

APAR Information

  • APAR number

    OA40928

  • Reported component name

    VTAM V4 MVS/ESA

  • Reported component ID

    569511701

  • Reported release

    1D0

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-11-28

  • Closed date

    2013-01-09

  • Last modified date

    2013-04-02

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

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

    UA67672 UA67673

Modules/Macros

  • ISTDRAPC ISTLOK   ISTMGCVG ISTMSTAT TPLOCK
    TPUNLOCK
    

Fix information

  • Fixed component name

    VTAM V4 MVS/ESA

  • Fixed component ID

    569511701

Applicable component levels

  • R1C0 PSY UA67672

       UP13/03/22 P F303

  • R1D0 PSY UA67673

       UP13/03/22 P F303

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:

z/OS family

Software version:

1D0

Operating system(s):

z/OS

Reference #:

OA40928

Modified date:

2013-04-02

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