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IC74941: Client application generates FDC file with Probe ID XC130031 after being denied access by a server-side security exit.

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APAR status

  • Closed as program error.

Error description

  • A WebSphere MQ V7 Client application receives a memory
    exception and then terminates after being denied access to a
    queue manager by a server-side security exit.
    
    The client also has a security exit defined.
    
    A FDC file is written by the application process, showing:
    
    Probe Id   XC130031
    Component  xehExceptionHandler.
    
    It will also show similar information to this:
    
    MQM Function Stack
    MQCONN
    trmzstMQCONNX
    reqDoConnect
    reqConnectChl
    reqFreeSess
    rriFreeSess
    rriTermExits
    xcsFFST
    

Local fix

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    Users of WebSphere MQ client application programs, where there
    is a client-side security exit.
    
    Platforms affected:
    All Distributed (iSeries, all Unix and Windows)
    ****************************************************************
    PROBLEM SUMMARY:
    A client connection can be ended early in its life, for example
    during the security exchange that takes place between security
    exits.
    
    There is a situation where this can happen during startup of a
    channel that is in principle eligible for sharing
    conversations, but is the first such channel. In this situation,
    the full initialization of WebSphere MQ's internal
    client state has not taken place.
    
    In this situation, the early ending of the channel leads to a
    code path being taken to clean up WebSphere MQ's internal
    client state relating to a client-side security exit. In doing
    this, a pointer is de-referenced, but the pointer is null.
    

Problem conclusion

  • WebSphere MQ code has been corrected to avoid de-referencing a
    null pointer in the case described above.
    
    A workaround for this problem is to set SHARECNV(0) on the
    channel definition being used.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
                       v7.0
    Platform           Fix Pack 7.0.1.6
    --------           --------------------
    Windows            U200328
    AIX                U840698
    HP-UX (PA-RISC)    U841555
    HP-UX (Itanium)    U841560
    Solaris (SPARC)    U841556
    Solaris (x86-64)   U841562
    iSeries            tbc_p700_0_1_6
    Linux (x86)        U841557
    Linux (x86-64)     U841561
    Linux (zSeries)    U841558
    Linux (Power)      U841559
    
    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

    IC74941

  • Reported component name

    WMQ WINDOWS V7

  • Reported component ID

    5724H7220

  • Reported release

    701

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2011-03-09

  • Closed date

    2011-05-24

  • Last modified date

    2011-05-24

  • 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 WINDOWS V7

  • Fixed component ID

    5724H7220

Applicable component levels

  • R701 PSY

       UP

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Document Information

Modified date:
24 May 2011