IV78173: JAVA SEGMENTATION ERROR WITH VMSTATE=0X0002000F

APAR status

• Closed as program error.

Error description

• Error Message: the JVM crashes with segmentation error
  vmState=0x0002000f
  .
  Stack Trace: markClassesInInlineRanges
  jitWalkStackFrames
  walkStackFrames
  GC_VMThreadStackSlotIterator::scanSlots
  MM_RootScanner::scanOneThread
  MM_RootScanner::scanThreads
  MM_CopyForwardSchemeRootScanner::scanRoots
  MM_CopyForwardScheme::scanRoots
  MM_CopyForwardScheme::workThreadGarbageCollect
  MM_Dispatcher::run
  MM_CopyForwardScheme::copyForwardCollectionSet
  MM_CopyForwardDelegate::performCopyForwardForPartialGC
  .
  

Local fix

• The problem can be worked around with Java option -Xnoclassgc.
  Note that this might increase the memory usage of Java program.
  

Problem summary

• The JIT compiler doesn't correctly detect anonymous classes
  unloading and leaves a stale anonymous class address in the
  inlining table which is a data structure describing which
  methods are inlined into the compiled method. As a result, the
  garbage collector crashes on the stale class address while
  walking the Java call stack.
  

Problem conclusion

• The JIT compiler has been updated to correctly detect the
  unloading of anonymous classes and make sure the class addresses
  the inlining tables are updated.
  .
  This APAR will be fixed in the following Java Releases:
   8 SR2 (8.0.2.0)
  .
  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:

• Fixed component name

  JIT

• Fixed component ID

  620700124

Applicable component levels

• R130 PSY

     UP