IV72271: SEGMENTATION ERROR: FAILED TO FIND J2I THUNK

APAR status

• Closed as program error.

Error description

• Error Message: J2IThunkTable 'InvokeExactJ2IThunkTable':ERROR:
  Failed to find J2I thunk for LL signature
  (Ljava/lang/Object;)Ljava/lang/Object;Unhandled
  exceptionType=Segmentation error vmState=0x00000000(Note that
  the "LL" can be any sequences of the characters I, J, F, D, L,
  and V, depending on the signature.)Also, the program counter
  register "NIP" will contain the value 4:  "NIP=0000000000000004"
  .
  Stack Trace:
  .
  Only occurs on Power platform.  Only occurs when a method
  containing a call to java/lang/invoke/MethodHandle.invokeExact
  is compiled by the JIT compiler.
  

Local fix

• Disable jit compilation of the methods containing the
  problematic MethodHandle calls.
  

Problem summary

• The JIT compiler could occasionally generate calls to
  java/lang/invoke/MethodHandle.invokeExact without first
  generating the necessary fallback code ("j2i thunk") to handle
  the case when the receiver MethodHandle object has not yet been
  compiled.  When checking whether the fallback code was required,
  the compiler was using an overly-specific test that failed to
  account for the effects of certain (valid) optimizations.
  

Problem conclusion

• The compiler was changed to use the correct test, causing it to
  generate the fallback code in all required cases.
  .
  This APAR will be fixed in the following Java Releases:
     7 R1 SR3       (7.1.3.0)
  .
  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:

Fix information

• Fixed component name

  JIT

• Fixed component ID

  620700124

Applicable component levels

• R130 PSY

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