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IV39188: JDMPVIEW 'INFO THREAD' REPORTS CORRUPT JAVA STACKS

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APAR status

  • Closed as program error.

Error description

  • Error Message: Running the jdmpview "info thread *" command
    shows several threads with corrupt Java stacks, for example:
       associated Java thread:
        name:          WebSphere WLM Dispatch Thread t=009c2360
        Thread object: com/ibm/ws/util/ThreadPool$ZOSWorker @
    0x29585c28
        Priority:      5
        Thread.State:  RUNNABLE
        JVMTI state:   ALIVE RUNNABLE
        Java stack frames:
         <corrupt data encountered>
    .
    Stack Trace: N/A
    .
    

Local fix

Problem summary

  • The code in jdmpview failed to check whether any native stack
    frames were found before accessing the first frame in the list.
    

Problem conclusion

  • This defect will be fixed in:
    6.0.1 SR6
    7.0.0 SR5
    .
    jdmpview has been updated to correctly process the thread
    stacks.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV39188

  • 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

    2013-04-03

  • Closed date

    2013-04-03

  • Last modified date

    2013-04-03

  • 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



Document information

More support for: Runtimes for Java Technology
Virtual Machine

Software version: 260

Reference #: IV39188

Modified date: 03 April 2013