IBM Support

IV58789: JIT COMPILER HANG

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APAR status

  • Closed as program error.

Error description

  • Error Message: Program becomes unresponsive, with one thread
    hung in the jit compiler.
    .
    Stack Trace: N/A
    .
    

Local fix

  • One could specify -Xjit:disableLookahead to eliminate a possible
    erroneous interaction between the optimizations causing an
    infinite loop
    

Problem summary

  • In certain scenarios, the JIT optimizer would erroneously
    produce a cycle in a data structure, and then loop forever while
    attempting to process that data structure.
    

Problem conclusion

  • This APAR will be fixed in the following Java Releases:
       6 R1 SR8       (6.1.8.0)
       7    SR7       (7.0.7.0)
       6    SR16      (6.0.16.0)
       7 R1 SR1       (7.1.1.0)
    .
    The optimizer was fixed to prevent the erroneous cycle.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV58789

  • Reported component name

    JIT

  • Reported component ID

    620700124

  • Reported release

    260

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2014-04-04

  • Closed date

    2014-04-04

  • Last modified date

    2014-04-04

  • 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

  • R130 PSY

       UP



Document information

More support for: Runtimes for Java Technology
Just In Time (JIT) Compiler

Software version: 260

Reference #: IV58789

Modified date: 04 April 2014