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IV42366: JCMD INVOCATION WILL THROW EXCEPTION IBM JDK7 PACKAGE

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • Error Message: java.lang.ClassCastException:
ibm.tools.attach.J9VirtualMachine incompatible with
sun.tools.attach.HotSpotVirtualMachine
at sun.tools.jcmd.JCmd.executeCommandForPid(JCmd.java:156)
at sun.tools.jcmd.JCmd.main(JCmd.java:141)
.
Stack Trace: N/A
.

Local fix

  • 



Problem summary


    

  • JCmd was introduced by Oracle with 7u4 specifically written for
Hotspot JVM. This tool have JVM internal dependency and need to
be supported by IBM J9 VM as most of the functionality like to
query JVM state, GC state, running thread information etc need
IBM J9VM specific support.

    



Problem conclusion


    

  • This defect will be fixed in:
7.0.0 SR5
.
JCmd tool is currently being removed from IBM JDK7 package. This
tool will be introduced back into IBM JDK7 package while the
tools gets specifically implemented for IBM J9 JVM.

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IV42366
    • 

  • Reported component name
    JAVA CLASS LIBS
    • 

  • Reported component ID
    620700130
    • 

  • Reported release
    700
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt
    • 

  • Submitted date
    2013-05-11
    • 

  • Closed date
    2013-05-13
    • 

  • Last modified date
    2013-05-25
    • 





    

  • 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


    

  • R700  PSY
       UP
    • 








      
              
                            

              

              [{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSNVBF","label":"Runtimes for Java Technology"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"7.0","Line of Business":{"code":"LOB36","label":"IBM Automation"}}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            21 February 2022
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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