IBM Support

IT32110: IBM MQ 9.1.4 Queue manager may take longer to end and this in turn causes a hang when a RDQM is failed over.

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APAR status

  • Closed as program error.

Error description

  • The RDQM failover may hang and queue manager will not start on
any of the nodes. The status on the Primary node will show
"Ended immediately" whereas the QM status on other nodes is
"Running Elsewhere".

Local fix

  • Decreasing the HBINT on the SVRCONN channels to <= 30s.

Problem summary

  • ****************************************************************
USERS AFFECTED:
All IBM MQ users.


Platforms affected:
MultiPlatform

****************************************************************
PROBLEM DESCRIPTION:
When queue manager is ended it waits for all queue manager
processes to end, the listener process have seen to take about 5
minutes to terminate in some specific scenarios. In case of RDQM
this causes a hang during fail over and the queue manager does
not run on any of the nodes.

Problem conclusion

  • The MQ code has been modified to ensure the queue manager
listener ends in a timely manner.

---------------------------------------------------------------
The fix is targeted for delivery in the following PTFs:

Version    Maintenance Level
v9.2 LTS   9.2.0.1
v9.x CD    9.2.1

The latest available maintenance can be obtained from
'WebSphere MQ Recommended Fixes'
http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006037

If the maintenance level is not yet available information on
its planned availability can be found in 'WebSphere MQ
Planned Maintenance Release Dates'
http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006309
---------------------------------------------------------------

Temporary fix

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IT32110
    • 

  • Reported component name
    IBM MQ BASE MP
    • 

  • Reported component ID
    5724H7271
    • 

  • Reported release
    914
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2020-03-09
    • 

  • Closed date
    2020-07-28
    • 

  • Last modified date
    2020-07-28
    • 





    

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

    • 

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

    • 



Fix information


    

  • Fixed component name
    IBM MQ BASE MP
    • 

  • Fixed component ID
    5724H7271
    • 



Applicable component levels


    








      
              
                            

              

              [{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSYHRD","label":"IBM MQ"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"914","Line of Business":{"code":"LOB45","label":"Automation"}}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            29 July 2020
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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