IBM Support

IT27173: AMQPKA attribute incorrectly shown as being in seconds

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APAR status

  • Closed as program error.

Error description

  • The channel attribute "AMQP keep alive" (AMQPKA) is incorrectly
documented as being in seconds - the value is actually in
milliseconds. This means that the maximum allowed value of 99999
for this attribute is much smaller than expected, as this is in
milliseconds rather than seconds. There are also potentially
different intervals for AMQP keep alive frames being sent from
the queue manager's AMQP service across the network connection
to the client than those expected based on the value of AMQPKA
set.

Local fix

  • NA

Problem summary

  • ****************************************************************
USERS AFFECTED:
This issue affects users of the MQ AMQP service, who have set
the AMQP channel attribute "AMQP keep alive" (AMQPKA) to a value
greater than zero.


Platforms affected:
AIX, Linux on Power, Linux on x86-64, Linux on zSeries, Solaris
x86-64, Solaris SPARC, Windows, HP-UX Itanium

****************************************************************
PROBLEM DESCRIPTION:
The IBM MQ AMQP channel attribute "AMQP keep alive" (AMQPKA) was
defined as being in seconds at V8. The maximum value for the
property was 99999 seconds.

In IBM MQ V9.0 and V9.1. the "AMQPKA keep alive" value was set
in milliseconds. However, the documentation for the attribute in
the IBM MQ V9.0.x and V9.1.x sections of IBM Knowledge Center
was not completely updated to reflect this, and the maximum
value for the property was not modified.

One consequence of this was that the maximum value for the
property (which was 99999) actually meant 99999 milliseconds,
not 99999 seconds. As a result, the maximum value for AMQPKA at
V9.0 and V9.1 was about 100 seconds - when the property was
defined as being in seconds in IBM MQ V8, the maximum value was
about 28 hours.

Another potential consequence was that the interval at which
AMQP keep alive frames were sent by the MQ AMQP service across
the network connection to a connected AMQP client was different
than expected when setting the attribute value.

Problem conclusion

Temporary fix

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IT27173
    • 

  • Reported component name
    IBM MQ BASE M/P
    • 

  • Reported component ID
    5724H7261
    • 

  • Reported release
    900
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2018-12-03
    • 

  • Closed date
    2019-12-20
    • 

  • Last modified date
    2019-12-20
    • 





    

  • 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 M/P
    • 

  • Fixed component ID
    5724H7261
    • 



Applicable component levels


    








      
              
                            

              

              [{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSYHRD","label":"IBM MQ"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"9.0","Edition":"","Line of Business":{"code":"LOB45","label":"Automation"}}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            20 December 2019
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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