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PM46338: CICS DOES NOT AUTOMATICALLY RECONNECT TO THE MQ QUEUE MANAGER AFTER THE MQ QM IS STOPPED AND RESTARTED W 11/11/21 PTF PECHANGE

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APAR status

  • Closed as program error.

Error description

  • After applying PTF UK68064 , CICS no longer reconnects to
the MQ queue manager when the queue manager is stopped and
restarted while CICS remains up.
.
Here is an example of the messages issued by CICS when the
queue manager is stopped:
.
DFHMQ0341 I STOP requested by alert monitor CKAM.
DFHMQ0107 I A request to end CKTI has been received. CKTI ended.
DFHMQ0334 I Adapter shutdown successful.
DFHMQ0342 I CONNECT received from alert monitor.
DFHMQ0324 I All queue managers in queue sharing group MQSG are
   inactive.
DFHMQ0308 I Queue manager MQM1 is stopped. Connect request
   deferred.
DFHMQ0364 I Monitor terminated normally.
.
The last of those messages, DFHMQ0364 , is the one that
shouldn't be occurring.  It shows that the Alert Monitor task,
CKAM , is terminated.  But that task should not be terminated
at this point.  It is the task that would be able to detect
when the Queue Manager is restarted.

Local fix

  • Back off UK68064

Problem summary

  • ****************************************************************
* USERS AFFECTED: All users with UK68064 applied               *
****************************************************************
* PROBLEM DESCRIPTION: When a WebSphere MQ Queue Manager which *
*                      is attached to a CICS system is brought *
*                      down, it does not automatically         *
*                      re-connect to the CICS system when it   *
*                      is brought back up again                *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
The CICS/WMQ adapter monitor task CKAM does not re-start the
adapter in the case where a WMQ QMGR has been stopped and
re-started.
Additional keywords: DFHMQ0364, MSGDFHMQ0364, MQ0364

Problem conclusion

  • UK68064
DFHMQDSC has been altered so that the cNoOfPendingEve count is
set to zero only when CICS initiates the termination of the
CICS/WMQ adapter during CICS shutdown.

Temporary fix

  • FIX AVAILABLE BY PTF ONLY

Comments

  • 



APAR Information




    

  • APAR number
    PM46338
    • 

  • Reported component name
    CICS TS Z/OS V4
    • 

  • Reported component ID
    5655S9700
    • 

  • Reported release
    600
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    YesPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt
    • 

  • Submitted date
    2011-08-24
    • 

  • Closed date
    2011-11-28
    • 

  • Last modified date
    2012-01-01
    • 





    

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

    • 

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

    
PM52570 UK74275
    

    • 



Modules/Macros


    

  • DFHMQDSC

    



Fix information


    

  • Fixed component name
    CICS TS Z/OS V4
    • 

  • Fixed component ID
    5655S9700
    • 



Applicable component levels


    

  • R600  PSY  UK74275
       UP11/12/02  P  F112
    • 



Fix is available


    

  • Select the PTF appropriate for your component level.
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Document Information


            

            


                        

            Modified date:
            

            01 January 2012
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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