IV29156: JDK CRASHES IN GC WHEN CLASS REDEFINITION IS USED WITH THE GENCO N GC POLICY

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • Error Message: A dump event "gpf" or "traceassert" is received.
    .
    Stack Trace: Native stack trace:
    
       MM_MarkingScheme::scanClass+0xa96
       MM_MarkingScheme::completeClassMark+0x150
       MM_MarkingScheme::markLiveObjectsScan+0x64
       MM_ParallelMarkTask::run+0x3c
       MM_Dispatcher::run+0x35
       MM_ParallelGlobalGC::markAll+0xcd
       MM_ParallelGlobalGC::masterThreadGarbageCollect+0x174
       MM_ConcurrentGC::internalGarbageCollect+0x22
       MM_Collector::garbageCollect+0x214
       MM_MemorySubSpace::systemGarbageCollect+0x6a
    .
    

Local fix

  • This issue can be worked around using -Xgcpolicy:optthruput
    option.
    

Problem summary

  • The problem is caused when the garbage collector tries to scan
    the static field of a redefined class.
      This issue only happens if JIT is disabled or the JDK is under
    the java debugger.
    

Problem conclusion

  • This defect will be fixed in:
    6.0.1 SR4
    7.0.0 SR3
    6.0.0 SR12
    .
      The JVM has been updated to prevent the crash from occurring
    when the garbage collector scans redefined classes.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV29156

  • 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

    2012-09-28

  • Closed date

    2012-10-09

  • Last modified date

    2012-10-09

  • 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

  • R600 PSY

       UP



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Document information


More support for:

Runtimes for Java Technology
Virtual Machine

Software version:

260

Reference #:

IV29156

Modified date:

2012-10-09

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