IV80396: UNEXPECTED JAVA.LANG.NULLPOINTEREXCEPTION OCCURS ON A LINE WHERE SUCH AN EXCEPTION IS NOT POSSIBLE

APAR status

• Closed as program error.

Error description

• Error Message: An unexpected java.lang.NullPointerException is
  thrown.
  .
  Stack Trace: N/A
  .
  The reported line number indicates that no object is being
  dereferenced or an object is being dereferenced but the
  semantics of the method imply that the object cannot be null.
  

Local fix

• This issue can be worked around on a specific method using the
  Java option
  -Xjit:{package/Class.method(signature)}(disableLocalCSE)
  Note that this option may degrade the performance of the
  specific method on which it is used.
  

Problem summary

• The problem occurs when an optimization called Local Common
  Sub-expression Elimination decides to 'common' two expressions
  which are only used for metadata purposes in the JIT compiler.
  Such expressions should never be 'commoned' together.
  

Problem conclusion

• The JIT compiler has been updated to prevent 'commoning' of
  metadata expressions.
  .
  This APAR will be fixed in the following Java Releases:
     8    SR2 FP10  (8.0.2.10)
     7 R1 SR3 FP30  (7.1.3.30)
     6    SR16 FP20 (6.0.16.20)
     7    SR9 FP30  (7.0.9.30)
  .
  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

     UP

• R600 PSY

     UP

• R260 PSY

     UP