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IT12196: ACCESS VIOLATION IN AMQRMPPA DURING SHARECNV(1)CLIENT RECONNECT AT MQ VERSION 8.0

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APAR status

  • Closed as program error.

Error description

  • The remote channel pool process (amqrmppa) can encounter an
    access violation during client reconnect at MQ version 8.0 with
    SHARECNV(1) channels.
    A SIGSEGV FFST is generated from the amqrmppa process.
    

Local fix

  • Set the SHARECNV property to a value other than 1 on the
    server-connection channel.
    

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    This issue affects users with MQ clients connecting over a
    server-connection channel with SHARECNV(1)
    
    
    Platforms affected:
    MultiPlatform
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    The remote channel pool process (amqrmppa) at MQ version 8.0 has
    a heartbeat monitor thread to process heartbeats for SHARECNV(1)
    clients in an MQGET API call.
    During client reconnect the heartbeat monitor thread could
    incorrectly process a non heartbeat flow from the client which
    would free resources associated with the client connection.
    This would lead to an access violation when these resources were
    accessed.
    

Problem conclusion

  • The heartbeat monitor thread has been updated to not process non
    heartbeat flows during client reconnect.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v8.0       8.0.0.5
    
    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

    IT12196

  • 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

    2015-11-10

  • Closed date

    2016-02-24

  • Last modified date

    2016-02-24

  • 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:
24 February 2016