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PI46444: WMQ Z/OS: ABEND0C4 PIC10 IN CSQXCSMM 15/12/21 PTF PECHANGE

A fix is available

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APAR status

  • Closed as program error.

Error description

  • The CHIN joblog contains these error messages:
    
    CSQX112E CSQXDISP Dispatcher process error, TCB=nnnnnnnn
     reason=0C4000-nnnnnnnn
    IEA794I SVC DUMP HAS CAPTURED:
     DUMPID=035 REQUESTED BY JOB (CSQ1CHIN)
     DUMP TITLE=CSQ1,ABN=0C4-nnnnnnnn,C=xxxxx.nnn.CHIN,M=CSQXDISP
     LOC=CSQXRCTL.CSQXCSMM+nnnnn
    
    The 0C4 in CSQXCSMM is occurring because rriAcceptSess has
    invoked cccFreeMem to release the pSess->pAccept block, but the
    rriSession addressed by pSess has been freed.
    
    Additional symptom may be an S0C4 in CMQXRMSA.
    
    Additional Symptom(s) Search Keyword(s):
    ABENDS0C4 S0C4 S00C4 0C4
    .
    0C4-00000011,C=R3600.710.CHIN,M=CSQXDISP,LOC=CSQXRCTL.
    CMQXRMSA+0603E
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All users of WebSphere MQ Version 7          *
    *                 Release 1 Modification 0.                    *
    ****************************************************************
    * PROBLEM DESCRIPTION: MQ channel fails to connect to queue    *
    *                      manager due to network error during the *
    *                      connection binding negotiation causing  *
    *                      a 0C4 abend in CMQXCSMM.                *
    *                                                              *
    *                      If the channel is a SVRCONN the client  *
    *                      application receives reason code        *
    *                      MQRC_CONNECTION_BROKEN (2009) from      *
    *                      MQCONN/MQCONNX.                         *
    *                                                              *
    *                      The CHIN joblog shows message CSQX112E. *
    *                                                              *
    *                      An additional symptom may be an abend   *
    *                      0C4-04 in CMQXRMSA.                     *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    If channel binding negotiation is interrupted by a network
    error, the channel connection is terminated causing the
    conversation and session control blocks to be freed. The session
    control block has a pointer to a workarea used during connection
    binding and the pointer to this area is not properly cleared
    causing a double free action that causes the 0C4 abend.
    

Problem conclusion

  • The pointer to the session binding workarea is properly cleared
    when the workarea is freed avoiding a double free condition
    preventing the 0C4 abend.
    100Y
    CMQXREVN
    CMQXRMSA
    CSQXCCAX
    CSQXCCCX
    CSQXREXT
    CSQXRFXC
    CSQXRMAS
    CSQXRMRS
    CSQXRMSS
    

Temporary fix

Comments

APAR Information

  • APAR number

    PI46444

  • Reported component name

    WMQ Z/OS V7

  • Reported component ID

    5655R3600

  • Reported release

    100

  • Status

    CLOSED PER

  • PE

    YesPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2015-08-06

  • Closed date

    2015-12-24

  • Last modified date

    2016-12-20

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

    PI32112

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

    UI34089

Modules/Macros

  • CMQXREVN CMQXRMSA CSQXCCAX CSQXCCCX CSQXREXT CSQXRFXC CSQXRMAS
    CSQXRMRS CSQXRMSS
    

Fix information

  • Fixed component name

    WMQ Z/OS V7

  • Fixed component ID

    5655R3600

Applicable component levels

  • R100 PSY UI34089

       UP16/02/03 P F602 {

Fix is available

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Document Information

Modified date:
20 December 2016