IV72100: JAVA VM HANGS ON SHUTDOWN WHEN FINALIZER THREAD SUSPENDED

APAR status

• Closed as program error.

Error description

• Error Message: N/A
  .
  Stack Trace: N/A
  .
  In the failure situation, a JVMTI agent suspends the Java VM
  finalizer daemon thread. All application threads terminate
  causing the Java VM to start the shutdown sequence, including
  terminating the JVMTI subsystem.The JVMTI agent is now unable
  resume the finalizer thread.The Java VM hangs waiting for the
  finalizer thread to terminate.
  

Local fix

• It is strongly recommended that system threads such as the
  finalizer, JIT and garbage collector threads, etc. not be
  suspended, either using JVMTI SuspendThread() or
  SuspendThreadList(), or the deprecated Thread.suspend(), as this
  can have unpredictable effects.Note that it is not necessary to
  suspend threads when getting their stack traces via JVMTI
  GetStackTrace(), Thread.getStackTrace() and related functions.
  

Problem summary

• The Java VM hangs on shutdown when finalizer thread is
  suspended.
  

Problem conclusion

• The Java VM will terminate if the finalizer thread is suspended
  at VM shutdown.  This prevents some normal JVM shutdown
  procedures from running, and may cause the JVM to leak memory at
  shutdown.
  .
  This APAR will be fixed in the following Java Releases:
     6    SR16 FP7  (6.0.16.7)
     7    SR9 FP10  (7.0.9.10)
     8    SR1 FP10  (8.0.1.10)
     6 R1 SR8 FP7   (6.1.8.7)
     7 R1 SR3 FP10  (7.1.3.10)
  .
  Contact your IBM Product's Service Team for these Service
  Refreshes and Fix Packs.
  For those running stand-alone, information about the available
  Service Refreshes and Fix Packs can be found at:
             https://www.ibm.com/developerworks/java/jdk/
  

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

• R600 PSY

     UP

• R260 PSY

     UP

• R270 PSY

     UP