IJ24946: JVM CRASH DURING JIT COMPILATION

APAR status

• Closed as program error.

Error description

• Error Message: The JVM stops unexpectedly. The javacore will
  indicate
  Dump Event "abort" (00020000) received
  .
  Stack Trace: Use of a native debugger will show that the crash
  occurred in a JIT compilation thread and the stack will include
  the following key entries:
  #37 0x00007f9dbfd3b727 in
  generateLabelInstruction(TR_X86OpCodes, TR::Node*,
  TR::LabelSymbol*, TR::CodeGenerator*) ()
     from
  ./<installdir>/java/jre/lib/amd64/compressedrefs/libj9jit29.so
  #38 0x00007f9dbfd42a46 in
  TR_OutlinedInstructionsGenerator::<TLD>TR_OutlinedInstructionsGe
  nerator() () from
  ./<installdir>/java/jre/lib/amd64/compressedrefs/libj9jit29.so
  .
  

Local fix

• The problem can usually be avoided by adjusting the memory
  allocated to the JIT for temporary use during compilation.
  The default value is 256MB, a value of 384MB would be a
  reasonable starting point that should make the problem much less
  likely to occur without increasing the JVM memory usage too
  much. This can be done with the following option (units in
  kilobytes):
  -Xjit:scratchSpaceLimit=393216
  

Problem summary

• If the memory available for the JIT compiler is exhausted at a
  very specific point in the compilation it causes an exception to
  be thrown from a C++ destructor, resulting in the JVM abruptly
  terminating. This problem is specific to the X86 platform.
  

Problem conclusion

• The mechanism for generating out of line instruction sequences
  was changed to avoid the need to allocate memory in a
  destructor. See OMR issue 4846 for an in-depth technical
  discussion (https://github.com/eclipse/omr/issues/4846)
  .
  This APAR will be fixed in the following Java Releases:
     8    SR6 FP11  (8.0.6.11)
  .
  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

  JIT

• Fixed component ID

  620700124

Applicable component levels