IJ33306: GPF event from method iterateStackTrace

APAR status

• Closed as program error.

Error description

• Error Message:
  A GPF event is received when Java is trying to walk the Java
  stack .
  .
  Stack Trace:
    libj9prt29.so+0x263fa : 0x263fa <mainSynchSignalHandler+554>
      [../../omr/port/unix/omrsignal.c:1070]
    libpthread.so.0+0xf630
    libj9vm29.so+0x9c28c : 0x9c28c <iterateStackTrace+1804>
      [exceptiondescribe.c:380]
    libjclse29.so+0x1e4d5 : 0x1e4d5 <getStackTrace+165>
      [common/jclexception.c:361]
    Java_java_lang_J9VMInternals_getStackTrace+0x30
  (0x00002B7CB39D03F0 [libjclse29.so+0x1b3f0])
  

Local fix

• The issue can be worked around using the -Xshareclasses:none
  option to disable the shared classes cache.
  

Problem summary

• The problem is caused when a wrong copy of the J9RomClass or the
  wrong number of ROMMethod count are used.
  

Problem conclusion

• The JVM has been updated to ensure the correct copy of the
  J9ROMClass and the correct number of the ROMMethod count are
  used
  .
  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

     UP