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IT25677: MQ NONSTOP PROBE ID ZC064002 FROM COMPONENT ZCGPROCESSCLOSEIPC ERROR 4022

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APAR status

  • Closed as program error.

Error description

  • When a CLOSE message is overtaken by a CPU DOWN message
    the cleanup done as a reaction to the CLOSE will fail
    since the data it tries to access is not valid anymore,
    resulting in error 4022 when trying to lock a mutex.
    When a CPU fails that contains MQ queue manager processes,
    internal connections to those processes, are not properly
    released and cleaned up.  Other MQ processes suffer errors
    performing Guardian process I/O.  FDC shows-
    
    Probe Id          :- ZC064002
    Component         :- zcgProcessCloseIPC
    Major Errorcode   :- xecF_E_UNEXPECTED_SYSTEM_RC
    Probe Description :- AMQ6119: An internal WebSphere MQ error
    has occurred
    ('4022 - Invalid function argument' from pthread_mutex_lock.)
    Arith1            :- 4022 fb6
    Comment1          :- '4022 - Invalid function argument' from
     pthread_mutex_lock.
    

Local fix

Problem summary

  • When a CPU fails that contains MQ queue manager processes,
    internal connections to those processes, are not properly
    released and cleaned up. Other MQ processes suffer errors
    performing Guardian process I/O and emit FFST's.
    

Problem conclusion

  • The IPCC component within MQ that manages communications
    between MQ processes has been revised to properly cleanup
    internal connections to missing processes, which allows
    them to handle and report the condition gracefully.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT25677

  • Reported component name

    WEBS MQ NSS ITA

  • Reported component ID

    5724A3902

  • Reported release

    531

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2018-07-12

  • Closed date

    2018-07-13

  • Last modified date

    2018-07-13

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

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

    IT25689

Fix information

  • Fixed component name

    WEBS MQ NSS ITA

  • Fixed component ID

    5724A3902

Applicable component levels

  • R531 PSY

       UP

[{"Line of Business":{"code":"LOB36","label":"IBM Automation"},"Business Unit":{"code":"BU053","label":"Cloud \u0026 Data Platform"},"Product":{"code":"SSFKSJ","label":"WebSphere MQ"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"5.3.1"}]

Document Information

Modified date:
27 September 2021