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PI55507: CHIN ABEND 0C4-00000011 CSQXADPM+006BE WITH CSQSNAP WITH XFFSRSTMVSASYNCCONSUMERTHREAD

A fix is available

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APAR status

  • Closed as program error.

Error description

  • CHIN abends and goes down with the following error messages:
    
    ----------------------------------------------------------------
    +CSQX053E +MQT2 CSQXFFST Error information recorded in CSQSNAP
              data set
    +CSQX112E +MQT2 CSQXDISP Dispatcher process error, TCB=009C46D8
              reason=0C4000-00000011
    CSQY291E CSQXDMPS SDUMPX FAILED, RC=00000208,MQT2,ABN=
             5C6-00E70054, LOC=CSQXADPM.CSQXADPM+072A2
    IEA794I SVC DUMP HAS CAPTURED:  680
    DUMPID=059 REQUESTED BY JOB (MQT2CHIN)
    +CSQX209E +MQT2 CSQXRESP Connection unexpectedly terminated,
           DUMP TITLE=MQT2,ABN= 0C4-00000011,C=W9700.800.CHIN,
           M=CSQXDISP,LOC=CSQXADPM.????????+006BE
           channel UYG.ESB.TO.MQ
           connection <connection> (<ipaddr>)
     (queue manager MQT0)
     TRPTYPE=TCP RC=00000000
    ----------------------------------------------------------------
    
    CSQSNAP shows eyecatchers:
    
    ----------------------------------------------------------------
    *X...XFFSrstMVSAsyncConsumerThrea*
    *d.......MOVR.........$&#162;&X...XINS*
    *................................*
    
    and
    
    *                        ....Inva*
    *lid aCon state..ACNV............*
    *......................K.........*
    *................................*
    *............... .. ........... .*
    *.. ...{\............            *
    ----------------------------------------------------------------
    
    The initial abend, the 0C4 in CSQXADPM, has occurred as the
    cciCONV control block at 2B34FBD0 has been released by
    ccxFreeAllMpxConvMem although it has subsequently been
    referenced.
    .
    Additional keywords:
    CSQX053E CSQX112E CSQX209E
    rstMVSAsyncConsumerThread invalid acon state acnv
    ABEND0C4 ABENDS0C4 S0C4 S00C4
    CHIN hang
    

Local fix

  • No Local Fix
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 8 *
    *                 Release 0 Modification 0.                    *
    ****************************************************************
    * PROBLEM DESCRIPTION: When using conversation sharing         *
    *                      (SHARECNV>0) with svrconn channels,     *
    *                      various errors and abends can occur     *
    *                      including:                              *
    *                                                              *
    *                      "+CSQX112E +xxxx CSQXDISP Dispatcher    *
    *                       process error, TCB=008CB510            *
    *                       reason=5C6000-00E70056"                *
    *                                                              *
    *                      "+CSQX113E +xxxx CSQXDISP Dispatcher    *
    *                       ended abnormally, TCB=008CB510         *
    *                       reason=5C6000-00E70054"                *
    *                                                              *
    *                      CSQX053E reporting an FFST in the       *
    *                      CSQSNAP DD. The FFST is written by      *
    *                      rstMVSAsyncConsumerThread with reason   *
    *                      "Invalid aCon state"                    *
    *                                                              *
    *                      Abends 0C4, 0C6, 102 or 202 in module   *
    *                      CSQXACNO                                *
    *                                                              *
    *                      Abend 0C4 in module CSQXADPM            *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    When a conversation ends, any handles associated with the
    conversation are deregistered with the queue manager, preventing
    them being posted, and the handle storage and conversation
    storage is freed.
    In rare cases, the handle was already posted when the
    conversation was ended, but the post had not yet been processed
    by CSQXACNO.
    Due to inadequate serialisation between CSQXACNO and the ending
    conversation, this led to CSQXACNO referencing the handle at
    unexpected times, or after the handle storage had been freed.
    Depending on exactly when CSQXACNO processed the post, and the
    state of the handle and conversation storage at that time, a
    variety of abends can occur.
    

Problem conclusion

  • CSQXACNO and CSQXRSTM are updated to serialise processing more
    effectively when conversations end, preventing CSQXACNO
    accessing handles that are no longer valid.
    000Y
    CSQXACNO
    CSQXRSTM
    

Temporary fix

  • *********
    * HIPER *
    *********
    

Comments

APAR Information

  • APAR number

    PI55507

  • Reported component name

    WMQ Z/OS 8

  • Reported component ID

    5655W9700

  • Reported release

    000

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    YesHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2016-01-18

  • Closed date

    2016-05-27

  • Last modified date

    2017-05-04

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

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

    UI38237 PI68897

Modules/Macros

  • CSQXACNO CSQXRSTM
    

Fix information

  • Fixed component name

    WMQ Z/OS 8

  • Fixed component ID

    5655W9700

Applicable component levels

  • R000 PSY UI38237

       UP16/07/06 P F607 ¢

Fix is available

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Document Information

Modified date:
04 May 2017