IV19467: GARBAGECOLLECTORMXBEAN.GETCOLLECTIONTIME() OCCASIONALLY RETURNS A SMALLER VALUE THEN THE PREVIOUS CALL

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • Error Message: N/A
    .
    Stack Trace: N/A
    .
    When the stress test was monitoring the time spent in the
    Garbage Collector the time would occasionally get smaller
    instead of increasing after a Garbage Collection event.
    

Local fix

  • N/A
    

Problem summary

  • If the clock on the machine is adjusted during a Garbage
    Collection event then there is a chance that the time spent in
    that GC event would appear to be negative.
    

Problem conclusion

  • This defect will be fixed in:
    7.0.0 SR1
    6.0.1 SR2
    .
    The JVM has been updated so that it never decreases this value.
    If the delta ends up being negative due to clock skew or
    adjustment the JVM just ignores the time for this event.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV19467

  • 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

    2012-04-10

  • Closed date

    2012-04-10

  • Last modified date

    2012-04-10

  • 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 #:

IV19467

Modified date:

2012-04-10

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