IZ90414: WINDOWS: NULLPOINTEREXCEPTION RUNNING SELECTOR.SELECT()

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • Error Message: NullPointerException
    .
    Stack Trace: Exception in thread "ServerWorker1"
    java.lang.NullPointerException
            at
    sun.nio.ch.WindowsSelectorImpl.implDereg(WindowsSelectorImpl.jav
    a:653)
            at
    sun.nio.ch.SelectorImpl.processDeregisterQueue(SelectorImpl.java
    :168)
            at
    sun.nio.ch.WindowsSelectorImpl.doSelect(WindowsSelectorImpl.java
    :205)
            at
    sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:99)
            at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:110)
            at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:114)
            at
    com.ibm.mq.communications.NonBlockingServerWorker.run(NonBlockin
    gServerWorker.java:110)
     at java.lang.Thread.run(Thread.java:811)
    .
    NA
    

Local fix

  • Problem is not observed with ipV4 stack enabled. Use JVM
    argument -Djava.net.preferIPv4Stack=TRUE as a workaround
    

Problem summary

  • java.lang.NullPointerException thrown during nio channel
    selection process. NPE was seen to be thrown while one of
    channel which is not registered was tried to get accessed during
    deregistering process.
    

Problem conclusion

  • This defect will be fixed in:
    5.0.0 SR12 FP3
    .
    JVM is updated to deregister only the registered channels and
    there by avoid the null pointer exception
    .
    To obtain the fix:
    Install build 20110106 or later
    

Temporary fix

Comments

APAR Information

  • APAR number

    IZ90414

  • 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

    2010-12-13

  • Closed date

    2011-03-01

  • Last modified date

    2011-03-01

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

    IZ97564

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 #:

IZ90414

Modified date:

2011-03-01

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