PM74678: ABEND4C5 REASON CODE 74BE2508 WITH LSQA SUBPOOL 205 EXHAUSTED

A fix is available

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APAR status

  • Closed as unreproducible in next release.

Error description

  • LSQA subpool 205 fills up with XFCRHTE entries that are not
    being freed.  ABEND4C5 RC 74BE2508 results.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All users of the IBM Communication Server    *
    *                 for z/OS Version 1 Release 13                *
    *                 IP: Distributed DVIPA                        *
    ****************************************************************
    * PROBLEM DESCRIPTION: LSQA subpool 205 fills up with unfreed  *
    *                      XFCRHTE entries resulting in ABEND4C5   *
    *                      RC 74BE2508.                            *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    During connection establishment from a distributed DVIPA on a
    target stack a SYN sends an XCF message to create an XFCRHTE
    routing control block on the sysplex distributor.
    Meanwhile before the XCF message arrives, the SYNACK arrives
    at the distributor. A temporary XFCRHTE is created to queue
    the SYNACK at the distributor. When the XCF message does
    arrive a new XFCRHTE is created and the SYNACK is forwarded to
    the target, but the temporary XFCRHTE is not freed.
    This is a timing problem that can occur whenever a SYNACK
    for a distributed connection arrives at the distributor
    before the XCF message that creates the primary XFCRHTE.
    +-------------------------------------------------------------+
    + Please check our Communications Server for OS/390 homepages +
    + for common networking tips and fixes.  The URL for these    +
    + homepages can be found in Informational APAR II11334.       +
    +-------------------------------------------------------------+
    

Problem conclusion

Temporary fix

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

Comments

  • Distributed DVIPA processing was modified to free the XFCRHTE
    control block.
    

APAR Information

  • APAR number

    PM74678

  • Reported component name

    TCP/IP V3 MVS

  • Reported component ID

    5655HAL00

  • Reported release

    1D0

  • Status

    CLOSED UR1

  • PE

    NoPE

  • HIPER

    YesHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-10-09

  • Closed date

    2012-11-07

  • Last modified date

    2013-01-02

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

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

    UK83314 PM77356

Modules/Macros

  • EZBXFACI EZBXFHSH EZBXFUTL EZBX6ACI EZBX6HSH
    EZBX6UTL
    

Fix information

  • Fixed component name

    TCP/IP V3 MVS

  • Fixed component ID

    5655HAL00

Applicable component levels

  • R1D0 PSY UK83314

       UP12/12/22 P F212

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 #:

PM74678

Modified date:

2013-01-02

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