IJ33251: CRASH AFTER USER ISSUES &QUOT:KILL -SIGQUIT&QUOT: TO GENERATE JAVACORE FILES WHEN -XRS:SYNC IS USED.

APAR status

• Closed as program error.

Error description

• Error Message: A GPF event or illegal instruction event is
  received after user issues "kill -SIGQUIT" to generate
  javacore files when -Xrs:sync is used.
  .
  Stack Trace: The native stack trace looks like this:
   jswalk.walkLiveMonitorSlots()
   jitGetOwnedObjectMonitors()
   getOwnedObjectMonitorsIterator()
   walkFrame()
   jitWalkStackFrames()
   walkStackFrames()
   getOwnedObjectMonitors()
   JavaCoreDumpWriter::getOwnedObjectMonitors()
   protectedGetOwnedObjectMonitors()
   omrsig_protect()
   JavaCoreDumpWriter::writeThread()
  
  JavaCoreDumpWriter::writeThreadsWithNativeStacks()
   protectedWriteThreadsWithNativeStacks()
   omrsig_protect()
   JavaCoreDumpWriter::writeThreadSection()
   protectedWriteSection()
   omrsig_protect()
   JavaCoreDumpWriter::JavaCoreDumpWriter()
   runJavadump()
   doJavaDump()
   protectedDumpFunction()
   omrsig_protect()
   runDumpFunction()
   runDumpAgent()
   triggerDumpAgents()
   sigQuitHandler()
   omrsig_protect()
   sigQuitWrapper()
   runHandlers()
   asynchSignalReporter()
   thread_wrapper()
  .
  

Local fix

Problem summary

• The problem is caused when a null pointer is used to parse the
  monitors of Java threads.
  

Problem conclusion

• The JVM has been updated so that the null pointer is not used to
  parse the monitors of Java threads.
  .
  This APAR will be fixed in the following Java Releases:
   8 SR6 FP35 (8.0.6.35)
  .
  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

• R270 PSY

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