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IV25945: SERVICELOADER DOES NOT RESPECT THE LAZINESS

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APAR status

  • Closed as program error.

Error description

  • Error Message: Providers are not located and instantiated lazily
in ServiceLoader.
Each invocation of the iterator method does not lazily locates
the providers. There is no cache to store the instance of the
provider, therefore the providers
are always reloaded on a ServiceIterator.next() operation.
For example, the correct symptom should be:
test.serviceloader.impl.LoadImpl1@1f6c1f6c
test.serviceloader.impl.LoadImpl2@26322632
serviceLoader iterator 2nd round
test.serviceloader.impl.LoadImpl1@1f6c1f6c
test.serviceloader.impl.LoadImpl2@26322632
serviceLoader iterator 3rd round
test.serviceloader.impl.LoadImpl1@1f6c1f6c
test.serviceloader.impl.LoadImpl2@26322632
But the wrong symptom is:
serviceLoader iterator 1st round
test.serviceloader.impl.LoadImpl1@7d247d24
test.serviceloader.impl.LoadImpl2@3c003c0
serviceLoader iterator 2nd round
test.serviceloader.impl.LoadImpl1@22a422a4
test.serviceloader.impl.LoadImpl2@233c233c
serviceLoader iterator 3rd round
test.serviceloader.impl.LoadImpl1@488a488a
test.serviceloader.impl.LoadImpl2@49224922
.
Stack Trace: N/A
.

Local fix

  • 



Problem summary


    

  • The problem is caused because there is no cache to store the
instance of the providers.

    



Problem conclusion


    

  • This defect will be fixed in:
6.0.0 SR12
6.0.1 SR4
.
ServiceLoader has been updated to prevent the problem.

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IV25945
    • 

  • Reported component name
    JAVA CLASS LIBS
    • 

  • Reported component ID
    620700130
    • 

  • Reported release
    600
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt
    • 

  • Submitted date
    2012-08-09
    • 

  • Closed date
    2012-08-16
    • 

  • Last modified date
    2012-08-31
    • 





    

  • 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
    JAVA CLASS LIBS
    • 

  • Fixed component ID
    620700130
    • 



Applicable component levels


    

  • R600  PSY
       UP
    • 








      
              
                            

              

              [{"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SSCVQ3Y","label":"Java Class Libraries"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"6.0","Edition":"","Line of Business":{"code":"","label":""}}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            31 August 2012
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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