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OA31309: ECSA SP241 STORAGE ON AUNCB_DELAYED_RCM_RUPE_Q IST467I CONTACTED ERROR

A fix is available

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APAR status

  • Closed as program error.

Error description

  • VTAM ECSA in SP241 KEY6 RUPEPRIV UTILCSAL growth following
    IST467I CONTACTED ERROR.  Storage is queued on Enterprise
    Extender AUNCB_DELAYED_RCM_RUPE_Q and is never freed
    although the connection is dead.  This APAR is to limit
    the number of inbound RCM signals.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All using AHHC or Enterprise Extender        *
    *                 connections.                                 *
    ****************************************************************
    * PROBLEM DESCRIPTION: VTAM STORAGE GROWTH IN SP241 ECSA       *
    *                      (UTILCSAL).                             *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    The problem is summarized as follows:
    
    1) Inbound Connection_Setup signals (RUPEs) are being
       accumulated on the AUNCB_DELAYED_RCM_RUPE_Q waiting
       for the Enterprise Extender connection to complete
       CONTACTED processing.
    2) It is assumed an error occurred during CONTACTED
       processing that did not generate a cleanup flow
       to the AUNCB PU PAB.
    3) This left the connection in an undesirable state
       accumulating Connection_Setup RUPEs (new RTP
       pipe activation requests).
    4) This leads to high RUPEPRIV and UTILCSAL GETBLK
       storage pool growth.
    5) There were no traces to understand what caused the
       CONTACTED error.  This APAR is addressing the
       problem of queueing inbound RCM RUPEs endlessly.
    

Problem conclusion

  • ISTAHNCB - Defined AHNCB_DELAYED_RCM_RUPE_Q_CNT to hold the
               current count of RUPEs on the
               AHNCB_DELAYED_RCM_RUPE_Q.  Also defined a new
               constant AHNCB_DELAYED_RCM_RUPE_Q_LIMIT to define
               a queue limit for the AHNCB_DELAYED_RCM_RUPE_Q.
    ISTAUNCB - Defined AUNCB_DELAYED_RCM_RUPE_Q_CNT to hold the
               current count of RUPEs on the
               AUNCB_DELAYED_RCM_RUPE_Q.  Also defined a new
               constant AUNCB_DELAYED_RCM_RUPE_Q_LIMIT to define
               a queue limit for the AUNCB_DELAYED_RCM_RUPE_Q.
    ISTTSCRC - Modified code to free inbound RCM RUPEs if the
               number of delayed RCM RUPEs exceeds the queue
               limit (for AHHC and EE). Also, added the QCOUNTER
               operand to the TPADDEL invocation
               when processing RUPEs on the
               AUNCB_DELAYED_RCM_RUPE_Q and
               AHNCB_DELAYED_RCM_RUPE_Q queues.
    ISTAUCLA - Added the QCOUNTER operand to the TPREMEL invocation
               when processing RUPEs on the
               AUNCB_DELAYED_RCM_RUPE_Q.
    ISTTSC9P - Added the QCOUNTER operand to the TPREMEL invocation
               when processing RUPEs on the
               AHNCB_DELAYED_RCM_RUPE_Q.
    ISTTSCCN - Added the QCOUNTER operand to the TPREMEL invocation
               when freeing RUPEs on the
               AUNCB_DELAYED_RCM_RUPE_Q and
               AHNCB_DELAYED_RCM_RUPE_Q queues.
    ISTTSC8E - Included for maintenance purposes.
    

Temporary fix

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

Comments

APAR Information

  • APAR number

    OA31309

  • Reported component name

    VTAM V4 MVS/ESA

  • Reported component ID

    569511701

  • Reported release

    190

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    YesHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2009-12-02

  • Closed date

    2009-12-21

  • Last modified date

    2010-03-01

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

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

    UA51906 UA51907 UA51908

Modules/Macros

  • ISTAHNCB ISTAUCLA ISTAUNCB ISTTSCCN ISTTSCRC
    ISTTSC8E ISTTSC9P
    

Fix information

  • Fixed component name

    VTAM V4 MVS/ESA

  • Fixed component ID

    569511701

Applicable component levels

  • R1A0 PSY UA51906

       UP10/02/09 P F002

  • R1B0 PSY UA51907

       UP10/02/09 P F002

  • R190 PSY UA51908

       UP10/02/09 P F002

Fix is available

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Document Information

Modified date:
01 March 2010