PM74621: CSQ1,ABN=5C6-00D40060,U=USER1 ,C=R3600.7xx.MMC -CSQMPCRT,M= CSQGFRCV,LOC=CSQMLPLM.CSQMPCRT+xxxxxxxx DURING SHUTDOWN

A fix is available

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APAR status

  • Closed as program error.

Error description

  • The abend5C6-00D40060 occurs during MQ and DB2 Shutdown
    MSTR LOG:
    01.39.53 CSQM137I +CSQ1 CSQMTCHI  STOP CHINIT COMMAND ACCEPTED
    01.40.05 CSQ5016I +CSQ1 CSQ5MONR Connection to DP36 quiescing,
                      DB2 terminating
    01.40.05 CSQ5019I +CSQ1 CSQ5DISC Disconnected from DB2 DP36
    01.40.05 CSQ5003A +CSQ1 CSQ5CONN Connection to DB2 using DP3G
                      pending, no active DB2
    01.40.06 IEA794I SVC DUMP HAS CAPTURED:
             DUMPID=018 REQUESTED BY JOB (CSQ1CHIN)
             DUMP TITLE=CSQ1,ABN=5C6-00D40060,U=USER1 ,
             C=R3600.7xx.MMC -CSQMPCRT,M=CSQGFRCV,
             LOC=CSQMLPLM.CSQMPCRT+xxxxxxxx
    01.40.07 CSQM053E +CSQ1 CSQMPCRT Shared channel recovery
             terminated, DB2 not available
    .
    Dump Title:
    CSQ1,ABN=5C6-00D40060,U=USER1 ,C=R3600.7xx.MMC -CSQMPCRT,M=
    CSQGFRCV,LOC=CSQMLPLM.CSQMPCRT+xxxxxxxx
    .
    X'00D40060' shared channel recovery processing requires DB2
    manager to be active to retrieve shared channel status
    .
    PSW at Abend: 077C0000 AD2A657C   DSA 48EF0B40 From Header SDWA
    PASID 007F  SASID 007F - REGs 0-15 follow :-
    48EF0D04 845C6000 00F50020 00000007
    48EF0E6C 48EF0D44 22C40050 00000001
    22C40050 00000000 48EF0D08 4D2D6818
    2D2A6B10 48EF0B40 AD2A642E 00D40060
    .
    According to the code, Reg2 contains the ULRETURNC:
    00F50020 (CSQ5_DB2_manager_not_active)
    .
    The change team reviewed the dump from the 5C6-00D40060 abend
    and they can see that it has occurred as DB2 is being shutdown
    at the same time as the CHIN. CSQMPCRT has been invoked for
    shared channel recovery processing and has tried to delete from
    DB2 the status entries for inbound shared channels. However,
    during this processing the connection to DB2 has been lost, and
    the state of the connection (DANC.DB2S.Status) set to 'pending
    stop' (DANC_DB2S_PENDSTOP). This results in CSQ5SCST returning
    CSQ5_DB2_MANAGER_NOT_ACTIVE, which results in the abend. In
    this situation CSQ5SCST should be returning
    CSQ5_DB2_UNAVAILABLE, in which case the abend will not occur.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All users of WebSphere MQ for z/OS version 7 *
    *                 Release 0 Modification 1 and Release 1       *
    *                 Modification 0.                              *
    ****************************************************************
    * PROBLEM DESCRIPTION: During CHINIT shut down abend           *
    *                      5C6-00D40060 is issued if DB2 is being  *
    *                      stopped as well (not shut down yet).    *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    The abend has occurred as DB2 is being shutdown at the same time
    as the CHINIT. CSQMPCRT has been invoked for shared channel
    recovery processing to deal with channels that have a shared
    channel status entry.
    During this processing the connection to DB2 has been lost, and
    the state of the connection (DANC.DB2S.Status) is set to
    'pending stop' (DANC_DB2S_PENDSTOP). This results in CSQ5SCST
    returning CSQ5_DB2_MANAGER_NOT_ACTIVE, which results in the
    abend.
    

Problem conclusion

  • The code in CSQ5SCST was changed to return CSQ5_DB2_UNAVAILABLE,
    preventing the abend from occurring.
    010Y
    100Y
    CSQ5SCST
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM74621

  • Reported component name

    WMQ Z/OS V7

  • Reported component ID

    5655R3600

  • Reported release

    010

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-10-09

  • Closed date

    2012-12-10

  • Last modified date

    2013-02-04

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

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

    UK90178 UK90179

Modules/Macros

  • CSQ5SCST
    

Fix information

  • Fixed component name

    WMQ Z/OS V7

  • Fixed component ID

    5655R3600

Applicable component levels

  • R010 PSY UK90178

       UP13/01/16 P F301

  • R100 PSY UK90179

       UP13/01/16 P F301

Fix is available

  • Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.



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Document information


More support for:

z/OS family

Software version:

7.0.1

Reference #:

PM74621

Modified date:

2013-02-04

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