IBM Support

IV55245: JVM WRONGLY COMPARES THE BYTECODE OF A NATIVE METHOD DURING CLAS SFILE RETRANSFORMATION/REDEFINITION REQUESTED BY A JAVA AGENT OR

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APAR status

  • Closed as program error.

Error description

  • Error Message: A dump event "gpf" received
    .
    Stack Trace:     {libj9jvmti26.so}{utfsAreIdentical}
        {libj9jvmti26.so}{fixMethodEquivalences}
        {libj9jvmti26.so}{redefineClassesCommon}
        {libj9jvmti26.so}{jvmtiRedefineClasses}
        {libinstrument.so}{redefineClasses}
    
    {libinstrument.so}{Java_sun_instrument_InstrumentationImpl_redef
    ineClasses0}
        {sun/instrument/InstrumentationImpl.redefineClasses0}
    .
    

Local fix

Problem summary

  • The problem is caused when native methods exist in the class to
    be re-defined.
    

Problem conclusion

  • This APAR will be fixed in the following Java Releases:
       6 R1 SR8       (6.1.8.0)
       7    SR7       (7.0.7.0)
       7 R1           (7.1.0.0)
       6    SR16      (6.0.16.0)
    .
    The JVM has been updated so that the native methods are properly
    handled during classfile retransformation/redefinition.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV55245

  • 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

    2014-02-10

  • Closed date

    2014-02-20

  • Last modified date

    2014-03-21

  • 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

  • R270 PSY

       UP

  • R600 PSY

       UP



Document information

More support for: Runtimes for Java Technology
Virtual Machine

Software version: 260

Reference #: IV55245

Modified date: 21 March 2014