IBM Support

IJ08124: IBM MQ queue manager ended unexpectedly and an FDC file with probe ID ZC038020 from component zcpSetInitiator is generated.

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

  • An FDC file is written that contains this information:
    
    Probe Id          :- ZC038020
    Component         :- zcpSetInitiator
    Program Name      :- amqzxma0
    Major Error code   :-STOP
    Probe Type        :- HALT6109
    MQM Function Stack
    ExecCtrlrMain
    zxcProcessMessage
    zxcMQIRequest
    zxcConnectAgent
    zcpSetInitiator
    xcsFFST
    
    The above FDC is generated due to data inconsistency and will
    cause the Queue Manager to end.
    
    The problem is extremely rare, and has only ever been seen on
    systems running high workloads.
    
    Additional Symptom(s) Search Keyword(s):
    ZC038020;zcpSetInitiator
    

Local fix

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    High workload systems running MQ version 7.0.1 may be affected
    by this issue.
    
    
    Platforms affected:
    HP-UX PA-RISC, Solaris SPARC, Solaris x86-64, Windows, HP-UX
    Itanium
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    The root cause is the possibility of creating a timing window
    when data may be inconsistent, as a result from a modern
    processor deciding to re-order the instructions when detaching a
    pipe. The issue historically has been very rare and frequency of
    occurrences very low.
    

Problem conclusion

  • Code has been added to remove these timing windows.
    This APAR IJ08124 fixes the problem on Solaris, HP-UX and
    Windows.
    The APAR SE53763 fixed the same problem on iSeries.
    
    ---------------------------------------------------------------
    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

    IJ08124

  • Reported component name

    WMQ HP ITAINIUM

  • Reported component ID

    5724H7228

  • Reported release

    701

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2018-08-01

  • Closed date

    2019-01-11

  • Last modified date

    2019-01-11

  • 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 HP ITAINIUM

  • Fixed component ID

    5724H7228

Applicable component levels



Document information

More support for: WebSphere MQ
APAR / Maintenance

Software version: 7.0.1

Reference #: IJ08124

Modified date: 11 January 2019