IV26364: GETSTACKTRACE METHOD FAILING WITH SIGNAL SIGSEGV IN MULTITHREADE D ENVIRONMENT

APAR status

• Closed as program error.

Error description

• Error Message: Java process terminated with signal SEGV/GPF
  while in getStackTrace
  .
  Stack Trace: Offset  Function
  ------  --------
  0000077a  walkStackFrames
  0000007e  getStackTraceForThread
  00c7f204  RUNJAVATHREAD
  000000e0  javaProtectedThreadProc
  0000071a  j9sig_protect
  00000072  javaThreadProc
  0000051c  thread_wrapper
  00000f50  CELQPCMM
  .
  

Local fix

Problem summary

• The problem is due to a race condition when a thread is halted
  for inspection while it is halting another thread for
  inspection.  This may cause the thread to continue running while
  the other thread attempts to walk its stack
  

Problem conclusion

• This defect will be fixed in:
  6.0.0 SR10
  6.0.1 SR1
  5.0.0 SR14
  .
  The JVM has been updated to prevent the race condition.
  .
  To obtain the fix:
  Install build 20111019 or later
  

Temporary fix

Comments

APAR Information

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

  IV09088

• 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 PSN

     UP