IV29640: LINKAGEERROR WHEN MULTIPLE THREADS LOAD THE SAME CLASS

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • Error Message: If two or more threads simultaneously attempt to
    load the same class using the same classloader, it is possible
    for the class loading to fail with a LinkageError.
    .
    Stack Trace: java.lang.LinkageError: my.Klass
            at
    java.lang.ClassLoader.defineClass(ClassLoader.java:295)
            at
    java.lang.ClassLoader.defineClass(ClassLoader.java:232)
    ...
    .
    

Local fix

Problem summary

  • This is due to an error in the JVM classloading synchronization
    algorithm.
    

Problem conclusion

  • This defect will be fixed in:
    7.0.0 SR3
    6.0.1 SR4
    6.0.0 SR12
    .
    The synchronization algorithm has been corrected.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV29640

  • 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

    2012-10-05

  • Closed date

    2012-10-08

  • Last modified date

    2012-10-08

  • 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 #:

IV29640

Modified date:

2012-10-08

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