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PK12462: Z/OS JAVA 1.4.2 : JIT DEADLOCK WITH GLOBAL COMPILE LOCK AND CHA LOCK

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APAR status

  • Closed as duplicate of another APAR.

Error description

  • A dump of a hang shows a JIT deadlock where

Thread1 has Global Compile Lock and is waiting for a CHA Lock
Thread2 has CHA Lock and is waiting for Global Compile Lock

The output from jformat may show the following:

Deadlock(s) detected !!!


==============================

  Thread 0x0x7ac7d0 "WebSphere t=007ac7d0"
    is waiting to be notified for:
      (0x24228858) "JITspaceT 1 lock"
       which is owned by:

    Thread 0x0x7a4d90 "WebSphere t=007a4d90"
      which is waiting to be notified for:
        (0x24228918) "JIT Global Compile lock"
         which is owned by:

      Thread 0x0x7ac7d0 "WebSphere t=007ac7d0"

==============================

Local fix

  • sov,defect 95896

Problem summary

  • 



Problem conclusion


    

  • 



Temporary fix


    

  • 



Comments


    

  • This APAR is a duplicate of PK18578

    



APAR Information




    

  • APAR number
    PK12462
    • 

  • Reported component name
    JAVA(1.X) Z/OS
    • 

  • Reported component ID
    5648C9801
    • 

  • Reported release
    140
    • 

  • Status
    CLOSED  DUB
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2005-09-26
    • 

  • Closed date
    2006-02-03
    • 

  • Last modified date
    2006-02-03
    • 





    

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

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

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Fix information


    



Applicable component levels


    








      
              
                            

              

              [{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSNVBF","label":"Runtimes for Java Technology"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"1.4.1","Edition":"","Line of Business":{"code":"LOB36","label":"IBM Automation"}}]
              

                                                                    

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            03 February 2006
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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