IV66036: ARITHMETIC DIVIDE BY ZERO EXCEPTION CAUSED BY INCORRECT LOOP VER SIONING

APAR status

• Closed as program error.

Error description

• Error Message: A possible error message could be: "Caused by:
  java.lang.ArithmeticException: divide by zero"
  .
  Stack Trace: N/A
  .
  Please note that the root cause for most
  "java.lang.ArithmeticException: divide by zero" is still
  incorrect Java application code. The scenario described in this
  APAR is a very rare case.
  

Local fix

• This issue can be worked around by using the
  -Xjit:disableLoopVersioner option. Please note there will be
  some performance loss.
  

Problem summary

• This problem can happen when the primary induction variable in a
  loop has a non-constant increment. JIT will incorrectly optimize
  the loop, resulting in a divide by zero exception.
  

Problem conclusion

• JIT has been fixed to not allow versioning of loops whose
  primary induction variable has a non-constant increment.
  .
  This APAR will be fixed in the following Java Releases:
     7    SR8 FP10  (7.0.8.10)
     7 R1 SR2 FP10   (7.1.2.10)
     6    SR16 FP3  (6.0.16.3)
     6 R1 SR8 FP3   (6.1.8.3)
  .
  Contact your IBM Product's Service Team for these Service
  Refreshes and Fix Packs.
  For those running stand-alone, Java maintenance is available
  from:
             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

• R260 PSY

     UP

• R600 PSY

     UP