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IV98521: SHA DIGEST INTERMITTENTLY RETURNS WRONG RESULT ON POWER8

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APAR status

  • Closed as program error.

Error description

  • Error Message: The output of SHA digest is not as expected. It
may cause different exceptions depends on the benchmark.
.
Stack Trace: N/A
.

Local fix

  • -Dcom.ibm.jit.crypto.nohardwaredigest=true

Problem summary

  • The problem is caused when SHA is running in a highly parallel
environment. This problem can only happen on Power8 (or newer).

Problem conclusion

  • This problem was a result of allowing GC to move the java
objects, while the native code was still in the middle of SHA
calculations. The JVM has been updated to prevent GC from
happening during SHA calculations.
.
This APAR will be fixed in the following Java Releases:
   8    SR5 FP5   (8.0.5.5)
.
Contact your IBM Product's Service Team for these Service
Refreshes and Fix Packs.
For those running stand-alone, information about the available
Service Refreshes and Fix Packs can be found at:
           https://www.ibm.com/developerworks/java/jdk/

Temporary fix

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IV98521
    • 

  • Reported component name
    JIT
    • 

  • Reported component ID
    620700124
    • 

  • Reported release
    130
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2017-07-28
    • 

  • Closed date
    2017-09-25
    • 

  • Last modified date
    2017-09-25
    • 





    

  • 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
    JIT
    • 

  • Fixed component ID
    620700124
    • 



Applicable component levels


    

  • R130  PSY
       UP
    • 








      
              
                            

              

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Document Information


            

            


                        

            Modified date:
            

            25 September 2017
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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