IBM Support

IT30274: A managed .NET or XMS application configured with multiple connection names for a queue manager hangs on reconnection

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APAR status

  • Closed as program error.

Error description

  • An XMS or managed .NET application which is configured with
multiple connection names for a queue manager is observed to
hang when failing over between entries in the namelist or CCDT,
for example when "endmqm -ir" is run against the active queue
manager instance.

Local fix

  • 



Problem summary


    

  • ****************************************************************
USERS AFFECTED:
This issue affects users of XMS or managed .NET MQ client
applications which are configured with multiple connection names
for a queue manager - either via a connectionnamelist property,
or a CCDT file.


Platforms affected:
Windows

****************************************************************
PROBLEM DESCRIPTION:
A logic error in the MQ Managed .Net client reconnection thread
synchronization caused the hang.

    



Problem conclusion


    

  • Thread synchronization of MQ managed .Net client code has been
corrected when multiple connection names are used to connect to
queue manager.

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

Version    Maintenance Level
v8.0       8.0.0.16
v9.0 LTS   9.0.0.11
v9.1 LTS   9.1.0.7

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
    IT30274
    • 

  • Reported component name
    IBM MQ APPL M20
    • 

  • Reported component ID
    5725Z0900
    • 

  • Reported release
    800
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2019-09-12
    • 

  • Closed date
    2020-10-15
    • 

  • Last modified date
    2020-10-15
    • 





    

  • 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 APPL M20
    • 

  • Fixed component ID
    5725Z0900
    • 



Applicable component levels


    








      
              
                            

              

              [{"Line of Business":{"code":"LOB36","label":"IBM Automation"},"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SS5K6E","label":"IBM MQ Appliance"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"8.0"}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            16 October 2020
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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