IBM Support

IV99778: INCORRECT INDEX USED WHEN ACCESSING ARRAY

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APAR status

  • Closed as program error.

Error description

  • Error Message: Unexpected behaviour may occur when the wrong
    element is accessed due to the incorrect array index being used.
    Other symptoms not yet known may be possible.
    .
    Stack Trace: N/A
    .
    This problem only affects z Systems
    

Local fix

Problem summary

  • The JIT compiler uses unsigned integers in its internal
    representation of Java bytecodes. Sometimes these need to be
    converted to longs. The code generation was not correctly
    handling this case, therefore an incorrect number might result
    in the generated code. The only known symptom of this problem is
    for array accesses but other problems may be possible.
    

Problem conclusion

  • The JIT compiler has been updated to correctly handle unsigned
    integer to long conversion.
    .
    This APAR will be fixed in the following Java Releases:
       8    SR5       (8.0.5.0)
    .
    Contact your IBM Product's Service Team for these Service
    Refreshes and Fix Packs.
    For those running stand-alone, information about the available
    Service Refreshes and Fix Packs can be found at:
               https://www.ibm.com/developerworks/java/jdk/
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV99778

  • Reported component name

    JIT

  • Reported component ID

    620700124

  • Reported release

    130

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2017-09-11

  • Closed date

    2017-09-11

  • Last modified date

    2017-09-11

  • 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

  • R130 PSY

       UP

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Document Information

Modified date:
11 September 2017