IBM Support

PI68597: Signal 11 in the Client daemon received after a SNA communications failure

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • After a SNA network failure the following problems were
    reported: Signal 11 received in CICS TG Client daemon code
    "CcDrvClose" after SNA network failure. Signal 11 received in
    IBM Communications Manager code "vav_copy_vcb" in CICS TG
    Client daemon process, after SNA network failure.
    

Local fix

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    All users of CICS TG and SNA connected CICS servers.
    ****************************************************************
    PROBLEM SUMMARY:
    After a SNA communications failure, the CICS TG Client daemon
    code can free some control blocks that are still required for
    processing while they are still required, leading to a signal
    11. If there is a reference to the freed control block in CICS
    TG code a signal 11 in CcDrvClose is reported, if the reference
    is made by IBM Communications Manager code a signal 11 in
    vav_copy_vcb is reported.
    The problem can occur either when a SNA connection that is
    already established is lost, or when a connection is being
    established and a CCIN timeout occurs.
    ****************************************************************
    

Problem conclusion

  • CICS TG has been changed to retain the required control blocks
    until the failed sessions have been cleaned up.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PI68597

  • Reported component name

    CICS TRNS GATE

  • Reported component ID

    5724I8102

  • Reported release

    810

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2016-09-02

  • Closed date

    2016-12-07

  • Last modified date

    2016-12-07

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

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

Fix information

  • Fixed component name

    CICS TRNS GATE

  • Fixed component ID

    5724I8102

Applicable component levels

  • R810 PSY

       UP

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Document Information

Modified date:
18 October 2021