IV21802: TIMER INCONSISTENCY ON MULTICORE/MULTIPROCESSOR WINDOWS SYSTEMS

APAR status

• Closed as program error.

Error description

• Error Message: On some multicore/multiprocessor Windows systems,
  System.nanoTime() may not increase monotonically, or it may
  exhibit unexpectedly large time jumps.
  .
  Stack Trace: N/A
  .
  

Local fix

• Please refer to the Microsoft Knowledge Base article:
  http://support.microsoft.com/kb/895980
  

Problem summary

• On some multicore/multiprocessor Windows systems,
  System.nanoTime() may not increase monotonically, or it may
  exhibit unexpectedly large time jumps. This may be caused by a
  limitation in the Windows function QueryPerformanceCounter().
  For more information and workarounds, see Microsoft Knowledge
  Base article: http://support.microsoft.com/kb/895980.
  

Problem conclusion

• This defect will be fixed in:
  7.0.0 SR2
  .
  The IBM User Guide for Java V7 on Windows has been updated to
  describe this limitation.
  

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

     UP