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IZ73767: INFINITE LOOP CAN OCCUR IN HASHMAP

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • Error Message: When using a HashMap instance in multithreaded
environment without synchronization, the customer may see
threads go into an infinite loop.
.
Stack Trace: The top of the looping stack trace will be in
HashMap.findNonNullKeyEntry().
.
N/A

Local fix

  • Synchronize usage of the HashMap instance.

Problem summary

  • HashMap is not intended for unsynchronized multithreaded use.
Usage this way can cause loops in internal structures to be
created, leading to infinite code loops traversing those
structures.

Problem conclusion

  • This defect will be fixed in:
6.0.0 SR9
.
The HashMap implementation has been updated to greatly narrow
the creation window for these loops.
.
To obtain the fix:
Install build 20100430 or later

Temporary fix

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IZ73767
    • 

  • 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
    2010-04-01
    • 

  • Closed date
    2010-04-30
    • 

  • Last modified date
    2010-04-30
    • 





    

  • 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  PSN
       UP
    • 








      
              
                            

              

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Document Information


            

            


                        

            Modified date:
            

            30 April 2010
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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