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

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 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

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