IZ78262: CRASH IN POLLARRAYWRAPPER CODE

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • Error Message: This crash happens in Compiled code of
    PollArrayWrapper in windows, when JIT and IPV6 are enabled for
    the application.
    .
    Stack Trace: at
    sun/nio/ch/PollArrayWrapper.putEventOps(PollArrayWrapper.java:11
    5(Compiled Code))
      at
    sun/nio/ch/PollArrayWrapper.addWakeupSocket(PollArrayWrapper.jav
    a:143)
      at
    sun/nio/ch/WindowsSelectorImpl.growIfNeeded(WindowsSelectorImpl.
    java:640(Compiled Code))
      at
    sun/nio/ch/WindowsSelectorImpl.implRegister(WindowsSelectorImpl.
    java:608(Compiled Code))
      at
    sun/nio/ch/SelectorImpl.register(SelectorImpl.java:152(Compiled
    Code))
      at
    java/nio/channels/spi/AbstractSelectableChannel.register(Abstrac
    tSelectableChannel.java:206(Compiled Code))
      at
    com/ibm/mq/communications/NonBlockingServerWorker.add(NonBlockin
    gServerWorker.java:67(Compiled Code))
      at
    com/ibm/mq/communications/NonBlockingListener.run(NonBlockingLis
    tener.java:235)
      at java/lang/Thread.run(Thread.java:811)
                        (or)
      at
    sun/nio/ch/PollArrayWrapper.putDescriptor(PollArrayWrapper.java:
    138(Compiled Code))
      at
    sun/nio/ch/PollArrayWrapper.replaceEntry(PollArrayWrapper.java:1
    10(Compiled Code))
      at sun/nio/ch/PollArrayWrapper.grow(PollArrayWrapper.java:125)
      at
    sun/nio/ch/WindowsSelectorImpl.growIfNeeded(WindowsSelectorImpl.
    java:637(Compiled Code))
      at
    sun/nio/ch/WindowsSelectorImpl.implRegister(WindowsSelectorImpl.
    java:608(Compiled Code))
      at
    sun/nio/ch/SelectorImpl.register(SelectorImpl.java:152(Compiled
    Code))
      at
    java/nio/channels/spi/AbstractSelectableChannel.register(Abstrac
    tSelectableChannel.java:206(Compiled Code))
      at
    com/ibm/mq/communications/NonBlockingServerWorker.add(NonBlockin
    gServerWorker.java:67(Compiled Code))
      at
    com/ibm/mq/communications/NonBlockingListener.run(NonBlockingLis
    tener.java:211)
      at java/lang/Thread.run(Thread.java:811)
    .
    

Local fix

  • The crash might not occur, when JIT is disabled or IPV6 is not
    used.
    

Problem summary

  • The code added to support IPV6 had a bug that leads to incorrect
    manipulations of the pollarray, leading to crash with either of
    the above stacks.
    

Problem conclusion

  • This defect will be fixed in:
    5.0.0 SR12 FP2
    .
    The JVM is modified to make the right array operations and
    thereby avoid the crash.
    .
    To obtain the fix:
    Install build 20100826 or later
    

Temporary fix

  • N/A
    

Comments

APAR Information

  • APAR number

    IZ78262

  • Reported component name

    JAVA 5 CLASS LI

  • Reported component ID

    620500130

  • Reported release

    500

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2010-06-30

  • Closed date

    2010-08-30

  • Last modified date

    2010-08-30

  • 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

    JAVA 5 CLASS LI

  • Fixed component ID

    620500130

Applicable component levels

  • R500 PSN

       UP



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Document information


More support for:

Runtimes for Java Technology
Java Class Libraries

Software version:

5.0

Reference #:

IZ78262

Modified date:

2010-08-30

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