IZ69786: VARIOUS CRASHES OR EXCEPTIONS IN APPLICATION

Subscribe

You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • Error Message: Various types of crashes or exceptions reported
    by the JVM during application runs.
    .
    Stack Trace: N/A
    .
    

Local fix

  • -Xjit:disableLookahead will work around the problem. Please not
    however, that disabling this optimization may impact performance
    of the application.
    

Problem summary

  • The problem is due to incorrect information generated by the JIT
    compiler about an array field declared in a class. The JIT
    compiler assumes that there is only a constant length allocation
    for this field in the class constructor and ignores other stores
    to this field. This erroneous information is then used by other
    optimizations (like constant propagation to do constant folding
    of the arraylength) and this results in unexpected program
    behavior.
    

Problem conclusion

  • This defect will be fixed in:
    6.0.0 SR8
    5.0.0 SR11 FP2
    .
    The JIT compiler has been updated so that such incorrect
    information is not generated for array fields.
    .
    To obtain the fix:
    Install build 20100210 or later
    

Temporary fix

Comments

APAR Information

  • APAR number

    IZ69786

  • Reported component name

    JAVA 5 JIT

  • Reported component ID

    620500124

  • Reported release

    500

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2010-02-08

  • Closed date

    2010-02-24

  • Last modified date

    2010-04-29

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

    IZ69785

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

Fix information

  • Fixed component name

    JAVA 5 JIT

  • Fixed component ID

    620500124

Applicable component levels

  • R500 PSN

       UP



Rate this page:

(0 users)Average rating

Document information


More support for:

Runtimes for Java Technology
Just In Time (JIT) Compiler

Software version:

5.0

Reference #:

IZ69786

Modified date:

2010-04-29

Translate my page

Machine Translation

Content navigation