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IV47049: WMQ MULTI-INSTANCE QUEUE MANAGER GETS EPERM FAILURE FROM FCNTL CALL AND FDC WITH PROBE ID XY513000 IS CREATED

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • The following is an example of one occurrence of the failure,
    but a possible match for this problem could be
    'Operation not permitted' seen in any FDC :-
    
    The Websphere MQ multi-instance queue manager running on Linux
    receives error EPERM (1 - Operation not permitted) when opening
    the master lock file.  An FDC is created with Probe ID XY513000
    indicating "Operation not permitted" when trying to open file:
    /var/mqm/qmgrs/QMGRNAME/ master
    
    WebSphere MQ First Failure Symptom Report
    =========================================
    Probe Id              :- XY513000
    Component         :- xcsQueryFileLock
    Program Name     :- dspmq
    Major Errorcode   :- xecF_E_UNEXPECTED_SYSTEM_RC
    Probe Description :- AMQ6119: An internal WebSphere MQ error has
    occurred   ('1 - Operation not permitted' from open.)
    FDCSequenceNumber :- 0
    Arith1            :- 1 (0x1)
    Comment1          :- '1 - Operation not permitted' from open.
    ---------------------------------------------------------------
    
    MQM Function Stack
    lpiSPIQueryQMStatus
    zutQueryQMFileLocks
    xcsQueryFileLock
    xcsFFST
    

Local fix

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    You may be impacted by this problem if the operating system
    unexpectedly returns EPERM from the fcntl function rather than
    the traditionally expected EACCES for a permissions failure.
    
    Platforms affected:
    Linux (Power),Linux (s390x),Linux (x86),Linux (zSeries)
    
    ****************************************************************
    PROBLEM SUMMARY:
    It has recently occurred that on Linux, fcntl appears to return
    EPERM from the fcntl function when EACCES used to be returned
    for a permissions failure. There may have been a Linux change
    causing that to happen.
    

Problem conclusion

  • There is only a relatively subtle distinction between EPERM and
    EACESS. To avoid re-occurrence of this suspected issue, coding
    of a number of fcntl calls in WebSphere MQ has been revised to
    treat EPERM and EACCES as equivalent.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v7.1       7.1.0.5
    v7.0       7.0.1.12
    v7.5       7.5.0.3
    
    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

    IV47049

  • Reported component name

    WMQ LIN X86-64

  • Reported component ID

    5724H7230

  • Reported release

    710

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-08-14

  • Closed date

    2013-10-14

  • Last modified date

    2013-10-14

  • 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 LIN X86-64

  • Fixed component ID

    5724H7230

Applicable component levels

  • R710 PSY

       UP

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Document Information

Modified date:
09 March 2021