PM95712: WMQ V701 DURING PEER LEVEL RECOVERY(PLR),ABEND5C6 00C51027 OCCUR WHILE QMGRS PROCESS DISCFAILCONN. XLRSNCODELOCKHELDBYSYS IN PLR.

A fix is available

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APAR status

  • Closed as unreproducible in next release.

Error description

  • WMQ V701 ABEND5C6 with reason code 00C51027 occurs when
    queue managers in queue sharing group DISCFAILCONN event
    during peer level recovery.   Phase 2 of peer level recovery
    a lock against a list header is issued but isn't granted
    and receives a IxlRsnCodeLockHeldBySys.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 7 *
    *                 Release 0 Modification 1.                    *
    ****************************************************************
    * PROBLEM DESCRIPTION: In a queue sharing group, with more     *
    *                      than 2 queue managers, if during phase  *
    *                      2 of peer level recovery a lock on the  *
    *                      list header cannot be held the queue    *
    *                      manager will abend 5C6-00C51027 in      *
    *                      CSQELPLM.CSQERWI2. This results in the  *
    *                      queue manager terminating with abend    *
    *                      6C6, reason 00C510AB.                   *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    During phase 2 of peer level recovery the recovery processing
    attempts to get a lock on a list header. If this cannot be
    granted immediately, receiving IxlRsnCodeLockHeldBySys from
    the coupling facility the processing waits and retries the lock.
    Obtaining the lock is tried 5 times if the reason code is
    IxlRsnCodeLockHeldBySys.
    
    The queue manager attempted to get the lock, but during this
    time it was actively held by the system. This resulted in the
    queue manager not being able to get the lock within the time
    the retries allowed, resulting in the queue manager abending
    5C6-00C51027. This causes the queue manager to abnormally
    terminate 6C6-00C510AB.
    

Problem conclusion

Temporary fix

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

Comments

  • The code for phase two of PLR has been updated to increase the
    wait between retries for the lock to a larger amount.
    

APAR Information

  • APAR number

    PM95712

  • Reported component name

    WMQ Z/OS V7

  • Reported component ID

    5655R3600

  • Reported release

    010

  • Status

    CLOSED UR1

  • PE

    NoPE

  • HIPER

    YesHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-08-23

  • Closed date

    2013-09-12

  • Last modified date

    2013-11-04

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

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

    UK97474

Modules/Macros

  •    CSQERWI2
    

Fix information

  • Fixed component name

    WMQ Z/OS V7

  • Fixed component ID

    5655R3600

Applicable component levels

  • R010 PSY UK97474

       UP13/10/16 P F310

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:

7.0.1

Reference #:

PM95712

Modified date:

2013-11-04

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