IV47272: GPF IN THE JIT MODULE

APAR status

• Closed as program error.

Error description

• Error Message: VM terminates with GPF.
  .
  Stack Trace: Investigation of the system core with a debugger
  will show that the crash happened in
  {libj9jit24.so}{_Z30protectedCompilationThreadProcP13J9PortLibra
  ryPv}
  The javacore will indicate that the current thread is the "JIT
  Compilation Thread"
  .
  The problem affects the 6.0, 6.0.1 and 7.0 releases.
  

Local fix

Problem summary

• This is an extremely rare problem that happens when a method is
  queued for JIT compilation, but the associated class is unloaded
  before the compilation happens. There exists a very small window
  of opportunity where the data structure used to describe the
  method to be compiled can be filled with an invalid value,
  resulting in the gpf when the structure is used.
  

Problem conclusion

• This defect will be fixed in:
  6.0.0 SR15
  6.0.1 SR7
  7.0.0 SR6
  .
  The JIT has been modified so that the potentially incorrect
  value will not be accessed if the class of the method has been
  unloaded.
  

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

• R600 PSY

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