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IV20388: CLASS COMPARISON FAILS WHEN CLASSES BEING COMPARED DIFFER IN DEB UG ATTRIBUTE DATA.

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APAR status

  • Closed as program error.

Error description

  • Error Message: N/A
.
Stack Trace: N/A
.

Local fix

  • This can be prevented by disabling shared cache using
-Xshareclasses:none.

Problem summary

  • During class loading if the existing class in shared cache has
debug attribute data but the class being loaded does not, then
the class comparison fails and the class is loaded again into
the cache. This results in an unrequired increase in shared
cache usage, thereby increasing JVM footprint.

Problem conclusion

  • This defect will be fixed in:
7.0.0 SR1
6.0.1 SR1
.
The JVM has been updated to correctly take into account debug
attribute data when comparing a class being loaded with an
existing class in the shared cache.

Temporary fix

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IV20388
    • 

  • Reported component name
    J9 COMMON CODE
    • 

  • Reported component ID
    620700127
    • 

  • Reported release
    260
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt
    • 

  • Submitted date
    2012-04-30
    • 

  • Closed date
    2012-04-30
    • 

  • Last modified date
    2012-04-30
    • 





    

  • 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
    J9 COMMON CODE
    • 

  • Fixed component ID
    620700127
    • 



Applicable component levels


    

  • R260  PSY
       UP
    • 








      
              
                            

              

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Document Information


            

            


                        

            Modified date:
            

            21 February 2022
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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