IJ12196: ARRAYINDEXOUTOFBOUNDS EXCEPTION OR OTHER SYMPTOMS

APAR status

• Closed as program error.

Error description

• Error Message: An unexpected ArrayIndexOutOfBounds Exception is
  thrown.
  .
  Stack Trace: One possible stack trace is:
  java/math/BigDecimal.powerOfTenBI
  java/math/BigDecimal.slPrecisionDivide
  java/math/BigDecimal.divide
  .
  This problem is specific to the IBM Z 31bit JDK. This problem
  was exposed in Java 8 SR5 FP25.
  

Local fix

• The problem can be avoided using the following command line
  option
  -Xjit:disableLongRegAllocation
  

Problem summary

• The 31bit code generator on IBM Z has been improved to use 64bit
  registers for 64bit values. These 64bit values were not being
  handled in a consistent way for some code paths with respect to
  mapping variables to registers and stack slots. As a result,
  various problems can occur with a 64bit variable including loss
  of the high or low 32bits, or getting garbage (including zero)
  in the low or high half. In the known case, the low half of a
  Java long is lost resulting in it being zero leading to an
  ArrayIndexOutOfBounds Exception which should not happen.
  

Problem conclusion

• This issue has been addressed by
  https://github.com/eclipse/omr/pull/3337
  .
  This APAR will be fixed in the following Java Releases:
     8    SR5 FP27  (8.0.5.27)
  .
  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