IV19957: SRT:NPE DUE TO DEATTACHMENT/REATTACHMENT OF ASSUMPTIONS IN CLASS ESUNLOAD HOOK

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APAR status

  • Closed as program error.

Error description

  • Error Message: Exception in thread \'_CouplerThread-9229
    (stderr)\' java.lang.NullPointerException
     at
    org.python.compiler.ProxyMaker.findPython(ProxyMaker.java:72)
     at org.python.proxies.subprocess$_CouplerThread$1.run(Unknown
    Source)
    .
    Stack Trace: N/A
    .
    

Local fix

  • TR_disableFindRelevantAssumptions=1
    

Problem summary

  • Problem is specific to realtime. This happens due to the
    functionality of finding relevant assumptions at the beginning
    of the classunloading hook, deattach rest for shorter gc pause
    time, and reattach back at the end of the hook (end of gc
    cycle).
    This doesn't work for RT because the gc yields to the
    application during the gc cycle. Thus the application may search
    the assumption and not find them (as they were deattached),
    causing wrong behavior (in the failing case it was
    methodOverrideAssumption)
    

Problem conclusion

  • This defect will be fixed in:
    7.0.0 SR1
    6.0.1 SR2
    WRT-V3 SR1
    .
    The solution was under metronome, to search also at the
    deattached list if exist. This was if the assumption exist, we
    would find it in one of the lists.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV19957

  • Reported component name

    JIT

  • Reported component ID

    620700124

  • Reported release

    260

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-04-20

  • Closed date

    2012-04-20

  • Last modified date

    2012-05-20

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

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

    IV21494

Fix information

  • Fixed component name

    JIT

  • Fixed component ID

    620700124

Applicable component levels

  • R260 PSY

       UP



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Document information


More support for:

Runtimes for Java Technology
Just In Time (JIT) Compiler

Software version:

260

Reference #:

IV19957

Modified date:

2012-05-20

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