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IT28153: Memory exception FDC with Probe ID XC130004 in function kqiPutMessageToSubscriber if subscriber queue is put-inhibited.

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APAR status

  • Closed as program error.

Error description

  • When a local durable subscription points to a remote clustered
    queue that has been set PUT(DISABLED) and a publisher puts a
    message to the associated topic, a memory exception (SIGSEGV)
    occurs in the function kqiPutMessageToSubscriber.
    
    The amqzlaa0 process fails and the following Failure Data
    Capture (FDC) record is produced with the following Probe Id,
    Component, and Function Stack:
    | Probe Id :- XC130004
    | Component :- xehExceptionHandler
    | Arith1 :- 11 (0xb)
    | Comment1 :- SIGSEGV: address not mapped(0x34)
    
    MQM Function Stack
    zlaMainThread
    zlaProcessMessage
    zlaProcessMQIRequest
    zlaMQPUT
    zsqMQPUT
    kpiMQPUT
    kqiPutTopic
    kqiPutMessageToSubscriber
    xcsFFST
    

Local fix

  • Set the problem queue to PUT(ENABLED).
    

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    Users of MQ publish/subscribe in the error scenario described.
    
    
    Platforms affected:
    MultiPlatform
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    In the scenario described, MQ was de-referencing a null pointer.
    

Problem conclusion

  • The MQ code has been corrected to cease using a null pointer.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v7.5       7.5.0.10
    v8.0       8.0.0.12
    v9.0 LTS   9.0.0.7
    v9.1 CD    9.1.3
    v9.1 LTS   9.1.0.3
    
    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

    IT28153

  • 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

    2019-02-18

  • Closed date

    2019-03-25

  • Last modified date

    2019-03-25

  • 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



Document information

More support for: WebSphere MQ
APAR / Maintenance

Software version: 7.5

Reference #: IT28153

Modified date: 25 March 2019