IV30058: CALL TO JAVA.LANG.MANAGEMENT.THREADMXBEAN.GETTHREADINFO(...) CRA SH THE VM BECAUSE GC RETURNS DEAD OBJECTS

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • Error Message: A segfault in libj9gc when trying walk all
    java.util.concurrent.locks.AbstractOwnableSynchronizer objects.
    .
    Stack Trace: N/A
    .
    

Local fix

Problem summary

  • java.lang.management.ThreadMXBean.getThreadInfo(...) walks the
    heap to get the list of ownable synchronizers and crashes
    because it might access a dead object.
    

Problem conclusion

  • This defect will be fixed in:
    7.0.0 SR3
    6.0.1 SR4
    .
    GC has been updated to keep a collection of all live ownable
    synchronizers. ThreadMXBean has been updated to use that
    collection instead of walking the entire heap.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV30058

  • 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

    2012-10-12

  • Closed date

    2012-10-12

  • Last modified date

    2012-11-11

  • 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



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Document information


More support for:

Runtimes for Java Technology
Virtual Machine

Software version:

260

Reference #:

IV30058

Modified date:

2012-11-11

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