IBM Support

IV66036: ARITHMETIC DIVIDE BY ZERO EXCEPTION CAUSED BY INCORRECT LOOP VER SIONING

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APAR status

  • Closed as program error.

Error description

  • Error Message: A possible error message could be: "Caused by:
    java.lang.ArithmeticException: divide by zero"
    .
    Stack Trace: N/A
    .
    Please note that the root cause for most
    "java.lang.ArithmeticException: divide by zero" is still
    incorrect Java application code. The scenario described in this
    APAR is a very rare case.
    

Local fix

  • This issue can be worked around by using the
    -Xjit:disableLoopVersioner option. Please note there will be
    some performance loss.
    

Problem summary

  • This problem can happen when the primary induction variable in a
    loop has a non-constant increment. JIT will incorrectly optimize
    the loop, resulting in a divide by zero exception.
    

Problem conclusion

  • JIT has been fixed to not allow versioning of loops whose
    primary induction variable has a non-constant increment.
    .
    This APAR will be fixed in the following Java Releases:
       7    SR8 FP10  (7.0.8.10)
       7 R1 SR2 FP10   (7.1.2.10)
       6    SR16 FP3  (6.0.16.3)
       6 R1 SR8 FP3   (6.1.8.3)
    .
    Contact your IBM Product's Service Team for these Service
    Refreshes and Fix Packs.
    For those running stand-alone, Java maintenance is available
    from:
               https://www.ibm.com/developerworks/java/jdk/
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV66036

  • Reported component name

    JIT

  • Reported component ID

    620700124

  • Reported release

    260

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2014-10-17

  • Closed date

    2014-10-27

  • Last modified date

    2014-12-02

  • 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



Document information

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

Software version: 260

Reference #: IV66036

Modified date: 02 December 2014