IBM Support

IT25165: MQ Appliance: SIGSEGV reported via FDC with ProbeID XC130003 when in dpcCmd_runmqras

Subscribe to this APAR

By subscribing, you receive periodic emails alerting you to the status of the APAR, along with a link to the fix after it becomes available. You can track this item individually or track all items by product.

Notify me when this APAR changes.

Notify me when an APAR for this component changes.

 

APAR status

  • Closed as program error.

Error description

  • One or more Failure Data Capture (FDC) records are generated
    reporting SIGSEGV, the FDC records show the following call
    history:
    
    O/S Call Stack for current thread
    /opt/mqm/lib64/libmqmcs_r.so(xcsPrintStackForCurrentThread+0x3e)
    [0x7f611ac4fe0e]
    /opt/mqm/lib64/libmqmcs_r.so(+0x11732d)[0x7f611ac6e32d]
    /opt/mqm/lib64/libmqmcs_r.so(PrepareDumpAreas+0xd14)[0x7f611ac69
    3c4]
    /opt/mqm/lib64/libmqmcs_r.so(xcsFFSTFn+0x19e0)[0x7f611ac6bf30]
    /opt/mqm/lib64/libmqmcs_r.so(xehExceptionHandler+0x965)[0x7f611a
    c66c25]
    /lib64/libpthread.so.0(+0xf710)[0x7f61199e9710]
    /lib64/libc.so.6(+0x13370f)[0x7f611957570f]
    /opt/mqm/lib64/libmqdputl_r.so(dpcStrcat+0xc7)[0x7f611a9451c7]
    /opt/mqm/bin/mqdpcli[0x40ab0a]
    /opt/mqm/bin/mqdpcli[0x40c80c]
    /lib64/libc.so.6(__libc_start_main+0xfd)[0x7f6119460d7d]
    /opt/mqm/bin/mqdpcli[0x4036d9]
    MQM Function Stack
    CLI
    dpcCmd_runmqras
    dpcStrcat
    xcsFFST
    

Local fix

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    This issue affects users of the IBM MQ Appliance who invoke the
    runmqras utility to capture diagnostic data.
    
    This issue is only seen in conjunction with an external error
    condition, such as a full filesystem, that prevents temporary
    directories being created during the execution of runmqras.
    
    
    Platforms affected:
    MultiPlatform
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    A logic error within the wrapper utility which invokes the
    runmqras application on the IBM MQ Appliance failed to account
    for invalid return values when attempting to create a working
    directory for runmqras.
    
    If the attempt to create a temporary working directory failed,
    for example due to a full filesystem, then a null pointer was
    accessed, resulting in a SIGSEGV.
    

Problem conclusion

  • The runmqras wrapper utility on the IBM MQ Appliance has been
    updated to report a meaningful error if the attempt to create a
    temporary working directory fails, and to prevent the null
    pointer access.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v8.0       8.0.0.11
    v9.1 CD    9.1.1
    v9.1 LTS   9.1.0.1
    
    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

    IT25165

  • Reported component name

    IBM MQ BASE MP

  • Reported component ID

    5724H7251

  • Reported release

    800

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2018-05-25

  • Closed date

    2018-08-22

  • Last modified date

    2018-08-22

  • 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

    IBM MQ BASE MP

  • Fixed component ID

    5724H7251

Applicable component levels

[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSYHRD","label":"IBM MQ"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"8.0.0.0","Edition":"","Line of Business":{"code":"LOB36","label":"IBM Automation"}}]

Document Information

Modified date:
22 August 2018