IBM Support

IT21581: Queue manager ends abnormally, generates FDC with probe ID XC130004, SIGSEGV

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

  • A queue manager abnormally ends, a failure data capture (FDC)
    record is generated with the follwing information and stack
    trace:
    
    Probe Id          :- XC130004
    Component         :- xehExceptionHandler
    Program Name      :- amqzlaa0
    Probe Description :- AMQ6109: An internal WebSphere MQ error has
    occurred.
    Arith1            :- 11 (0xb)
    Comment1          :- SIGSEGV: address not mapped(8)
    .
    MQM Function Stack
    zlaMainThread
    zlaProcessMessage
    zlaProcessMQIRequest
    zlaMQPUT
    zsqMQPUT
    kpiMQPUT
    kqiPutTopic
    kqiPutMessageToSubscriber
    kqiPutMsgSegments
    apiPutMessage
    aqmPutMessage
    aqhPutMessage
    aqhLocateSpace
    xcsFFST
    
    A secondary FDC record may be generated, showing the following:
    
    Probe Id          :- AQ051000
    Component         :- aqsStartQOp
    Program Name      :- amqzlaa0
    Major Errorcode   :- STOP_ALL
    Probe Type        :- HALT6110
    Probe Description :- AMQ6110: An internal WebSphere MQ error has
    occurred.
    .
    MQM Function Stack
    zlaMainThread
    zlaProcessMessage
    zlaProcessMQIRequest
    zlaMQPUT
    zsqMQPUT
    kpiMQPUT
    kqiPutTopic
    kqiPutMessageToSubscriber
    kqiPutMsgSegments
    apiPutMessage
    aqmPutMessage
    xcsFFST
    The queue manager error log also reports a dynamic queue
    damaged:
    AMQ7472: Object <queue name>, type queue damaged.
    

Local fix

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    IBM MQ publish/subscribe messaging users.
    
    
    Platforms affected:
    MultiPlatform
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    A coding error with the queue manager's publish subscribe
    messaging code could cause the queue manager to attempt to
    deliver a message to a queue which had recently been deleted.
    State information regarding the subscription associated with the
    deleted queue was not correctly updated on an unsubscribe
    operation. This then caused the queue manager to make the
    illegal memory access (SIGSEGV) reported in the FDC.
    

Problem conclusion

  • The coding error has been corrected to ensure that the state
    information is updated correctly during the unsubscribe
    operation.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v7.5       7.5.0.9
    v8.0       8.0.0.9
    v9.0 CD    9.0.5
    v9.0 LTS   9.0.0.3
    
    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

    IT21581

  • Reported component name

    WEBSPHERE MQ 7.

  • Reported component ID

    5724H7240

  • Reported release

    750

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2017-07-25

  • Closed date

    2018-01-05

  • Last modified date

    2018-01-05

  • 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

    WEBSPHERE MQ 7.

  • Fixed component ID

    5724H7240

Applicable component levels

  • R750 PSY

       UP



Document information

More support for: WebSphere MQ
APAR / Maintenance

Software version: 7.5

Reference #: IT21581

Modified date: 05 January 2018


Translate this page: