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IC74777: WebSphere MQ Client generates FDC with probe ID of XC006001 in xcsfreememfn.

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APAR status

  • Closed as program error.

Error description

  • A WebSphere MQ Client application continuously generates FDCs
    when connecting to a queue manager using SSL enabled MQI
    channels. The FDCs report the following informati:
    Probe Id          :- XC006001
    Component         :- xcsFreeMemFn
    Process Name      :- XXXXXXXXXX.exe
    Major Errorcode   :- xecS_I_PRIVATE_MEMORY_ERROR
    Comment1          :- invalid tail tag
    ----------------------------------------
    MQM Function Stack
    
    ImqObject::open
    ImqQueueManager::connect
    MQCONN
    trmzstMQCONNX
    reqDoConnect
    reqSelectChannelEntry
    cccFreeMem
    xcsFreeMemFn
    xcsFFST
    
    Other function stacks can also occur, but they will always end
    with xcsFreeMemFn and the FDC Tail tag will contain the same
    data as in SSLPeername of Channel Control Block.
    
    Note that other issues can also cause probe XC006001 to occur,
    this APAR is specific to the case when Tail tag is being
    overwritten by the SSLPeername data.
    

Local fix

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    All users of WebSphere MQ Client applications which connect to
    the queue manager using SSL enabled MQI channels.
    
    Platforms affected:
    All Distributed (iSeries, all Unix and Windows)
    ****************************************************************
    PROBLEM SUMMARY:
    The invalid tail tag FDC is cut because a memory corruption
    happens while copying the SSL Distinguished Name from the SSL
    certificate to the channel definition due to incorrect
    manipulation of the SSLPeerNamePtr.
    

Problem conclusion

  • The WebSphere MQ code has been modified such that SSLPeerNamePtr
    is manipulated correctly.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
                       v7.0
    Platform           Fix Pack 7.0.1.7
    --------           --------------------
    Windows            U200333
    AIX                U843721
    HP-UX (PA-RISC)    U844089
    HP-UX (Itanium)    U844094
    Solaris (SPARC)    U844090
    Solaris (x86-64)   U844096
    iSeries            tbc_p700_0_1_7
    Linux (x86)        U844091
    Linux (x86-64)     U844095
    Linux (zSeries)    U844092
    Linux (Power)      U844093
    
    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

    IC74777

  • 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

    2011-03-02

  • Closed date

    2011-04-29

  • Last modified date

    2011-06-14

  • 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:
14 June 2011