IV13910: JVM CRASHES WHILST ATTEMPTING TO WALK THE STACK AFTER SYSTEM.EXI T() IS CALLED

APAR status

• Closed as program error.

Error description

• Error Message: GPF / ABEND / OC4 / SIGSEGV received during JVM
  shutdown
  .
  Stack Trace: At the time of the crash, the failing thread is
  attempting to walk the stack, for example:
      walkStackFrames()
  
  GC_VMThreadStackSlotIterator::scanSlots(J9VMThread*,J9VMThread*,
  void*,void(*)(J9JavaVM*,J9O...()
      MM_RootScanner::scanThreads(MM_EnvironmentModron*)()
      MM_RootScanner::scanRoots(MM_EnvironmentModron*)()
  
  MM_MarkingScheme::markLiveObjects(MM_Environment*,bool,bool)()
      MM_ParallelMarkTask::run(MM_EnvironmentModron*)()
      dispatcher_slave_thread_proc2()
      j9sig_protect()
      dispatcher_slave_thread_proc()
      thread_wrapper()
      CELQPCMM()
     One of the active threads has a Java stack trace similar to
  the following:
  
      java/lang/Shutdown.halt0(Native Method)
      java/lang/Shutdown.halt(Bytecode PC:7)
      java/lang/Shutdown.exit(Bytecode PC:100)
      java/lang/Runtime.exit(Bytecode PC:14)
      java/lang/System.exit(Bytecode PC:4)
      ......
  .
  

Local fix

Problem summary

• There is a crash in the GC during VM shutdown via System.exit()
  due to missing native thread
  

Problem conclusion

• This defect will be fixed in:
  5.0.0 SR14
  6.0.0 SR11
  6.0.1 SR2
  7.0.0 SR1
  .
     The JVM has been updated to ensure all threads in a safe
  point before the call to System.exit() is executed.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

  IV13909

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  JAVA 5 J9 COMMO

• Fixed component ID

  620500127

Applicable component levels

• R500 PSY

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