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OA42983: ABEND0C4 IN ISTLUCSL DUE TO FREED NSSCB

A fix is available

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APAR status

  • Closed as program error.

Error description

  • ABEND0C4 in ISTLUCSL due to freed NSSCB..
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * All users of VTAM APPC (APPC=YES on the                      *
    * VTAM APPL statement) and/or VTAM APPN                        *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * ABEND0C4 in ISTLUCSL                                         *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Apply PTF                                                    *
    ****************************************************************
    The problem may be summarized as follows:
    1. CP-CP session initialization is started.
    2. While the Init_Other for the session is
    outstanding, an APPCB control block (NSSCB)
    is prematurely freed.
    3. When the Init_Other response returns, LUS references
    the freed control block.  ISTLUCSL ABENDs and then
    other ABENDs may also occur (e.g., ISTLUCRP, ISTNSCAK)
    

Problem conclusion

  • ISTNSSCB and ISTTSEXT are updated to facilitate the
    side-queueing of the NSSCB when the imbedded RPL is
    still active.
    
    ISTNSCAE, ISTNSCAG, ISTNSCAH, ISTNSCAI, ISTNSCAO, ISTNSCAP,
    ISTNSCAS, and ISTNSCAT are updated to side-queue the NSSCB
    if the RPL is still active. This is only true for CP-CP
    sessions.
    
    ISTTSCWU is updated to process any NSSCBs that were side-queued.
    
    ISTPSCR1 is updated to enhance the VRR coverage.
    
    ISTINCEI and ISTINCMT are recompiled due to ISTTSEXT growth.
    

Temporary fix

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

Comments

APAR Information

  • APAR number

    OA42983

  • Reported component name

    VTAM V4 MVS/ESA

  • Reported component ID

    569511701

  • Reported release

    210

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    YesHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2013-07-31

  • Closed date

    2013-08-12

  • Last modified date

    2013-10-07

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

    OA42811

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

    UA70316

Modules/Macros

  • ISTNSCAO ISTNSCAP ISTPSCR1 ISTNSCAS ISTNSCAT ISTTSCWU ISTNSCAE
    ISTNSCAG ISTNSCAH ISTNSCAI ISTINCEI ISTINCMT
    

Fix information

  • Fixed component name

    VTAM V4 MVS/ESA

  • Fixed component ID

    569511701

Applicable component levels

  • R210 PSY UA70316

       UP13/08/16 P F308

Fix is available

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Document Information

Modified date:
07 October 2013