IV20688: FLOATING POINT ERROR WITH -XCEEHDLR

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • Error Message: Unhandled exception
    Type=Floating point error vmState=0x00040001
    J9Generic_Signal_Number=00000020 Condition_Facilty_ID=CEE
    Condition_Message_Number=0C89 Condition_Severity=0003
    Handler1=193D1500 Handler2=193DE1E0
    .
    Stack Trace: N/A
    .
    Condition_Message_Number in range 0x0C88 (3208) to 0x0C82 (3234)
    inclusive.
    This range of Condition_Message_Number corresponds to LE
    conditions CEE3208S to CEE3234S (inclusive).
    

Local fix

  • Disable concurrent GC, for example, by using the command-line
    option -Xgcpolicy:optthruput
    

Problem summary

  • The problem is caused when JNI native code triggers an LE
    condition in the range CEE3208S to CEE3234S (inclusive), which
    are considered to be "arithmetic" LE conditions.
    When the JVM command-line option -XCEEHDLR is present, the JVM
    should convert arithmetic LE conditions that occur in JNI native
    code to Java exceptions of type
    com.ibm.le.conditionhandling.ConditionException.
    The problem is that the arithmetic condition is not being
    converted to a Java exception, and instead, the LE condition is
    being treated as a regular crash. The JVM therefore generates
    diagnostics and terminates the process.
    Note that this is an intermittent issue and only occurs when a
    thread doing garbage collection (GC) work examines the resources
    owned by the thread that triggered the arithmetic LE condition
    

Problem conclusion

  • This defect will be fixed in:
    7.0.0 SR1
    6.0.1 SR2
    .
    The JVM has been updated such that threads doing work for the GC
    no longer interfere with the JVM's ability to detect that the
    arithmetic LE condition occurred in a JNI native.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV20688

  • Reported component name

    J9 COMMON CODE

  • Reported component ID

    620700127

  • Reported release

    260

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-05-04

  • Closed date

    2012-05-04

  • Last modified date

    2012-05-04

  • 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

    J9 COMMON CODE

  • Fixed component ID

    620700127

Applicable component levels

  • R260 PSY

       UP



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Document information


More support for:

Runtimes for Java Technology
Virtual Machine

Software version:

260

Reference #:

IV20688

Modified date:

2012-05-04

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