OA42811: 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:                                              *
    ****************************************************************
    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.
    
    ISTNSCLR is included for maintenance purposes only.
    

Temporary fix

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

Comments

APAR Information

  • APAR number

    OA42811

  • 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

    2013-07-11

  • Closed date

    2013-07-31

  • Last modified date

    2013-10-03

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

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

    UA70127 UA70128 OA42983

Modules/Macros

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

Fix information

  • Fixed component name

    VTAM V4 MVS/ESA

  • Fixed component ID

    569511701

Applicable component levels

  • R1C0 PSY UA70127

       UP13/09/05 P F309

  • R1D0 PSY UA70128

       UP13/09/05 P F309

Fix is available

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Document information


More support for:

z/OS family

Software version:

1D0

Operating system(s):

z/OS

Reference #:

OA42811

Modified date:

2013-10-03

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