IBM Support

IV43875: ERRORS RUNNING WITH -XNOJIT WHEN USING SHARED CACHE POPULATED WI TH AOT COMPILED CODE GENERATED WITHOUT -XNOJIT

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APAR status

  • Closed as program error.

Error description

  • Error Message: java/lang/ClassCastException: K0340
    .
    Stack Trace: at java/util/LinkedHashMap.get
    (LinkedHashMap.java:301)
    at java/io/ExpiringCache.entryFor (ExpiringCache.java:107)
    at java/io/ExpiringCache.get (ExpiringCache.java:78)
    at java/io/UnixFileSystem.canonicalize (UnixFileSystem.java:162)
    at java/io/File.getCanonicalPath (File.java:589)
    .
    

Local fix

  • When attempting to run with -Xnojit, supply the additional
    option -Xaot:noload
    

Problem summary

  • When running under -Xnojit, the loading of AOT code did not
    properly invalidate optimistic assumptions made during
    compilation that would not be rectified at their normal time due
    to the lack of JIT compilation.
    

Problem conclusion

  • This defect will be fixed in:
    7.0.0 SR5
    6.0.1 SR6
    
    .
    Loaded AOT compiled code will now be checked for the conditions
    under which the code was compiled.  If the code was compiled in
    an environment where assumptions are active, the code is not
    used when those assumptions cannot be handled correctly.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV43875

  • Reported component name

    JIT

  • Reported component ID

    620700124

  • Reported release

    260

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-06-06

  • Closed date

    2013-06-06

  • Last modified date

    2013-06-13

  • 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

    JIT

  • Fixed component ID

    620700124

Applicable component levels

  • R260 PSY

       UP

  • R600 PSY

       UP

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Document Information

Modified date:
13 June 2013