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IV26340: SVT:NIO2:HANG: ZOS64 AND AMD64 THREADS HUNG IN PORT.REGISTER()

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APAR status

  • Closed as program error.

Error description

  • Error Message: Multiple threads stuck in parked state
    .
    Stack Trace: N/A
    .
    

Local fix

Problem summary

  • the problem occurs when the Java code depends on volatile
    semantics to ensure that the volatile field updates are seen in
    different threads.  The problem is caused by incorrect volatile
    field handling.  A memory fence for a volatile field is missing
    after a write operation due to incorrect JIT patching
    

Problem conclusion

  • This defect will be fixed in:
    6.0.0 SR11
    .
    The JVM has been updated to not patch over the fence if the
    field is found to be a volatile.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV26340

  • Reported component name

    JIT

  • Reported component ID

    620700124

  • Reported release

    600

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-08-16

  • Closed date

    2012-08-16

  • Last modified date

    2012-08-16

  • 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

  • R600 PSY

       UP

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Document Information

Modified date:
16 August 2012