IBM Support

IT38959: LOAD BALANCER GROUP ALGORITHM WEIGHTED ROUND ROBIN MIGHT UNEXPECTEDLY RELOAD DATAPOWER

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APAR status

  • Closed as program error.

Error description

  • Due to the algorithm for weighted round robin (WRR) in Load
Balancer Groups it is possible for a reload to occur.  The
weights of the members, if equal to each other or due to other
calculations may cause a reload due to bad division handling of
divide by zero.

Local fix

  • Use round robin, not weighted round robin.  Otherwise set unique
weights for each member, do not re-use the same weight on
multiple members.

Problem summary

  • Due to the algorithm for weighted round robin (WRR) in Load
Balancer Groups it is possible for a reload to occur.

Problem conclusion

Temporary fix

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IT38959
    • 

  • Reported component name
    DATAPOWER
    • 

  • Reported component ID
    DP1234567
    • 

  • Reported release
    A0X
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2021-11-03
    • 

  • Closed date
    2022-02-11
    • 

  • Last modified date
    2022-02-17
    • 





    

  • 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
    DATAPOWER
    • 

  • Fixed component ID
    DP1234567
    • 



Applicable component levels


    








      
              
                            

              

              [{"Line of Business":{"code":"LOB45","label":"Automation"},"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SS9H2Y","label":"IBM DataPower Gateways"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"A0X"}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            18 February 2022
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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