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IT15599: MQ channel stuck in initializing state and FDC produced from amqrmppa process with probeid XC130003

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • An MQ channel will not connect and DISPLAY CHS shows the channel
    in
    STATUS(INITIALIZING).
    
    The amqrmppa process issues initial failure data capture (FDC)
    file with a Probeid XC130003.
    Subsequent FDC files are issued with the following pattern:
    
    amqrmppa  42240  33 XC130003 xehExceptionHandler STOP
    amqrmppa  42240  33 RM042101 rrxReportError      STOP
    amqzxma0  80262   1 ZX005022 zxcProcessChildren
    lrcW_S_FAST_PATH_APP_DEAD
    
    This FDC pattern repeats as channel attempts to start.
    
    These external symptoms are same as APAR IT12477 but the
    underlying root cause is different to that APAR.
    

Local fix

  • Disable the message suppression function to prevent this
    scenario.
    
    Unset the following environment variables to disable the message
    suppression function:
    
    MQ_CHANNEL_SUPPRESS_MSGS
    MQ_CHANNEL_SUPPRESS_INTERVAL
    

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    Users using channels and queue managers configured to suppress
    error messages.
    
    
    Platforms affected:
    MultiPlatform
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    A coding error meant that it was possible for the channel
    process to access an uninitialized internal channel attribute
    used when suppressing messages. This in turn caused a memory
    exception when attempting to suppress error messages.
    

Problem conclusion

  • The MQ queue manager channel code has been updated to add a new
    check to prevent the memory exception.
    Another APAR fixed in this area was IT12477 and it is
    recommended to apply the fix for both IT15599 and IT12477 if
    these symptoms are observed.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v8.0       8.0.0.6
    v9.0 CD    9.0.2
    v9.0 LTS   9.0.0.1
    
    The latest available maintenance can be obtained from
    'WebSphere MQ Recommended Fixes'
    http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006037
    
    If the maintenance level is not yet available information on
    its planned availability can be found in 'WebSphere MQ
    Planned Maintenance Release Dates'
    http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006309
    ---------------------------------------------------------------
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT15599

  • Reported component name

    WMQ BASE MULTIP

  • Reported component ID

    5724H7251

  • Reported release

    800

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2016-06-06

  • Closed date

    2016-07-28

  • Last modified date

    2017-06-01

  • 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

    WMQ BASE MULTIP

  • Fixed component ID

    5724H7251

Applicable component levels

  • R800 PSY

       UP

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Document Information

Modified date:
01 June 2017