IV19792: THREADMXBEAN ALLTHREADIDS CAN CONTAIN 0

APAR status

• Closed as program error.

Error description

• Error Message: The call to
  javax.management.MBeanServerConnection.getAttribute(tb,
  \'AllThreadIds\');
  returned <OSB>1, 4, 5, 6, 7, 2, 8, 9, 10, 11, 12, 13, 14, 15,
  18, 21, 0<CSB>
  0 is invalid according to the ThreadMXBean documentation which
  states:
  Thread ID is a positive long value returned by calling the
  Thread.getId() method for a thread. The thread ID is unique
  during its lifetime. When a thread is terminated, this thread ID
  may be reused.
  .
  Stack Trace: N/A
  .
  

Local fix

Problem summary

• The JVM contained a small timing window where a Thread would
  become visible to the management API before being fully
  constructed, resulting in the threadID being 0.
  

Problem conclusion

• This defect will be fixed in:
  7.0.0 SR1
  6.0.1 SR2
  .
  JVM has been updated to not return Threads which have not been
  fully constructed from the management API.
  

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