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PI75879: WMQ: ABEND5C6-EBEBEBED IN CSQMBALC AND ABEND0D3-00000013

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APAR status

  • Closed as program error.

Error description

  • IBM Integration Bus ( IIB ) V10 on z/OS received multiple
    abends.  The joblog had errors:
    
    +BIP2628W (Msg 1/2) CSP9BRK EG1TC 5167 EXCEPTION
    CONDITION DETECTED ON INPUT NODE '<node>'.
    
    +BIP2680E (Msg 2/2) CSP9BRK EG1TC 5167 FAILED TO
    SETUP A MQ CONTROL CALLBACK FOR COMPONENT '<node>' TO QUEUE
    '<queue>' ON QUEUE MANAGER 'CSP9': MQCC=2; MQRC=2195.
    
    IEA794I SVC DUMP HAS CAPTURED: DUMPID=nnn REQUESTED
    BY JOB (CSP9BRKE) DUMP TITLE=CSP9,ABN=5C6-EBEBEBED,U=CSP9BRK
    ,C=W9700.800.MMC
    -CSQMALCH,M=CSQGFRCV,LOC=CSQMGPLM.CSQMBALC+000002F0
    
    
    +BIP2628W (Msg 1/2) CSP9BRK EG1TC 5167 EXCEPTION
    CONDITION DETECTED ON INPUT NODE '<node>'.
    
    +BIP2680E (Msg 2/2) CSP9BRK EG1TC 5167 FAILED TO
    SETUP A MQ CONTROL CALLBACK FOR COMPONENT '<node>' TO QUEUE
    '<queue>' ON QUEUE MANAGER 'CSP9': MQCC=2; MQRC=2195.
    
    IEA794I SVC DUMP HAS CAPTURED: DUMPID=nnn REQUESTED
    BY JOB (CSP9BRKE) DUMP TITLE=CSP9,ABN=0D3-00000013,U=CSP9BRK
    ,C=W9700.800.MMC -CSQMALCH,M=CSQGFRCV,
    PSW=077C1001D629F9CC,ASID=asid
    
    
    
    There is an issue with the management of stack storage when
    using message callbacks.
    
    When a message is too large for the buffer allocated in the
    application address space, the queue manager processing calls
    back to the application address space to allocate larger
    storage.
    
    If the task's stack in the queue manager address space has a
    virtual address that falls in the stack segment in the
    application address space, MQ  incorrectly calculates the
    amount of storage to be allocated. This causes a reduction in
    the available stack storage in the application address space
    for that task. If the same task makes several calls of this
    type, we can exhaust the stack segment which causes the
    tasks to abend 5C6-EBEBEBED.
    
    It appears that this leaves an invalid state which causes
    follow-on 0D3 abends.
    
    
    Additional Symptom(s) Search Keyword(s):
    ABEND5C6 ABENDS5C6 5C6 S5C6 S05C6 reason EBEBEBED CSQMBALC
    ABEND0D3 ABENDS0D3 0D3 S0D3 S00D3 00000013 RC13   CSQMALCH
    2195 MQRC_UNEXPECTED_ERROR
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 8 *
    *                 Release 0 Modification 0.                    *
    ****************************************************************
    * PROBLEM DESCRIPTION: MQ application using async consume may  *
    *                      abend with 5C6-EBEBEBED or              *
    *                      0D3-00000013.                           *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    The stack storage management code incorrectly determines whether
    an additional stack segment is present in the stack chain and
    modifies the stack pointer to compensate. As the additional
    stack segment is not present this calculation is not rolled back
    when releasing the stack storage and eventually the hard limit
    on stack sizes is breached, causing an abend to occur.
    

Problem conclusion

  • Stack storage management for the affected modules is amended to
    ensure that the stack pointer calculation is now correct.
    000Y
    CSQMAFRM
    CSQMAGTM
    CSQMBALC
    

Temporary fix

Comments

APAR Information

  • APAR number

    PI75879

  • Reported component name

    WMQ Z/OS 8

  • Reported component ID

    5655W9700

  • Reported release

    000

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2017-02-01

  • Closed date

    2017-03-16

  • Last modified date

    2017-03-16

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

    PI76913 UI45601

Modules/Macros

  • CSQMAFRM CSQMAGTM CSQMBALC
    

Fix information

  • Fixed component name

    WMQ Z/OS 8

  • Fixed component ID

    5655W9700

Applicable component levels

  • R000 PSY

       UP



Document information

More support for: WebSphere MQ

Software version: 8.0

Reference #: PI75879

Modified date: 16 March 2017


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