IBM Support

PI29708: WMQ Z/OS: CICS SHUTDOWN HANGS DUE TO A WAIT IN AN MQ TCB

A fix is available

Subscribe

You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • CICS Transaction Server (CICS TS) hung during shutdown. It
    would not cancel and had to be forced.
    
    A daughter TCB of the QR TCB was paused in IEAVEPS1, which had
    been called by CSQVSRX.
    
    IP SUMFOSUM for the asid and TCB had:
    ---------------------------------------------
    Type |WLIC/TARG|WT |LS |LSCP     |
    -----+---------+---+---+---------+-----------
      PC |00001D02 |   |02 |7F207260 |IEFJSREQ+E4
      PC |00086D02 |   |03 |7F207388 |CSQ3EPX+372C
     PRB |0002000D |00 |   |7F207010 |IGC003
    SVRB |00020078 |00 |   |7F207388 |IEAVEPS1
    
    The problem is due to the EBDR flag being left on in the
    Execution Block because of an ABENDS33E several hours prior.
    The S33E occurred when CSQSPURS was waiting for an SRB to
    complete. This caused subsequent recovery processing to hang,
    and hence CICS could not be shut down.
    
    This is the same situation as DB2 APAR PN84374.
    
    Additional Symptom(s) Search Keyword(s):
    hang hung termination terminate
    ABENDS33E ABEND33E ABEND S33E S033E 33E
    

Local fix

  • Use the MVS force command to end the CICS job.
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 7 *
    *                 Release 0 Modification 1 and Version 7       *
    *                 Release 1 Modification 0.                    *
    ****************************************************************
    * PROBLEM DESCRIPTION: CICS shutdown hangs due to a TCB        *
    *                      waiting for a MQ SRB to be resumed.     *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    A CICS region will not shutdown, even with an Immediate
    shutdown, it needs a FORCE command to bring it down.
    The CICS region will not come down because a TCB is waiting to
    be resumed on completion of an SRB scheduled by MQ.
    This SRB has been scheduled by CSQSPURS to purge some stack
    storage for an execution unit.
    It appears that a S33E abend occurred previously while this SRB
    was waiting for the purge stack processing to complete, and
    left the execution unit in an incomplete state. The flag EBDR
    was on indicating deferred recovery was expected.
    

Problem conclusion

  • CSQVFACE and CSQVTFRR have been altered to set a new bit when
    CSQSPURS is called, and if that bit is still set during recovery
    processing a resynchronisation is done with the SRB.
    010Y
    100Y
    CSQVFACE
    CSQVTFRR
    

Temporary fix

Comments

APAR Information

  • APAR number

    PI29708

  • Reported component name

    WMQ Z/OS V7

  • Reported component ID

    5655R3600

  • Reported release

    010

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2014-11-14

  • Closed date

    2015-02-27

  • Last modified date

    2015-05-04

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

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

    PI35262 UI25525 UI25526

Modules/Macros

  • CSQVFACE CSQVTFRR
    

Fix information

  • Fixed component name

    WMQ Z/OS V7

  • Fixed component ID

    5655R3600

Applicable component levels

  • R010 PSY UI25525

       UP15/04/30 P F504

  • R100 PSY UI25526

       UP15/04/30 P F504

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.

[{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SG19M","label":"APARs - z\/OS environment"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"7.0.1","Edition":"","Line of Business":{"code":"","label":""}}]

Document Information

Modified date:
04 May 2015