IBM Support

IV10068: SHARED CLASSES MEMORY IS NOT REUSED ON JDK STARTUP

Subscribe

You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • Error Message: When starting the JDK the Shared memory segment
previously allocated for shared classes is not reused.
.
Stack Trace: N/A
.
using AIX and ipcs -am it is possible to see multiple shared
memory segments.

Local fix

  • Change the effective group ID (egid) to the same as the Group ID
(GID)

Problem summary

  • This problem is caused by the JVM comparing the GID of the user
against the shared classes memory, but storing the EGID in the
shared memory segment. Causing the JVM to create a new shared
memory segment on startup.

Problem conclusion

  • This defect will be fixed in:
6.0.0 SR10
6.0.1 SR1
7.0.0 SR1
5.0.0 SR14
.
The JVM has been updated to compare the EGID to the ID stored in
the shared memory segment.
.
To obtain the fix:
Install build 20111025 or later

Temporary fix

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IV10068
    • 

  • Reported component name
    J9 COMMON CODE
    • 

  • Reported component ID
    620700127
    • 

  • Reported release
    600
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt
    • 

  • Submitted date
    2011-11-04
    • 

  • Closed date
    2011-11-15
    • 

  • Last modified date
    2011-11-28
    • 





    

  • APAR is sysrouted FROM one or more of the following:
    

    • 

  • APAR is sysrouted TO one or more of the following:
    

    
IV10072
    

    • 



Fix information


    

  • Fixed component name
    J9 COMMON CODE
    • 

  • Fixed component ID
    620700127
    • 



Applicable component levels


    

  • R600  PSY
       UP
    • 

  • R260  PSY
       UP
    • 








      
              
                            

              

              [{"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SSCVQ3W","label":"Virtual Machine"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"6.0","Edition":"","Line of Business":{"code":"","label":""}}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            28 November 2011
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
Page Feedback