IJ32356: BIGDECIMAL GIVES INCORRECT ARITHMETIC RESULTS FOR THE ADD AND SUBTRACT OPERATIONS ON THE RESULT OF A DIVIDE

APAR status

• Closed as program error.

Error description

• Error Message: N/A
  .
  Stack Trace: N/A
  .
  BigDecimal gives incorrect arithmetic results for the add and
  subtract operations on the result of a divide.
  

Local fix

• This issue can be worked around by calling the
  "java.math.BigDecimal.precision()" method on the result of
  divide operation before the add and subtract operations.
  

Problem summary

• BigDecimal gives incorrect arithmetic results for the add and
  subtract operations on the result of a divide
  

Problem conclusion

• The BigDecimal code has been adjusted and the issue is fixed via
  a boolean System property
  "ibm.java.math.BigDecimal.useSmallerScaleBD". Default value of
  this property is "false". Set this property value to "true" via
  command line to apply this fix.
  .
  1) This issue happens with MathContext.DECIMAL32 and
  MathContext.DECIMAL64.
  2) This issue is seen when the return from BigDecimal.divide()
  is passed as an argument to either BigDecimal.add() or
  BigDecimal.subtract().
  Please check your code for this pattern.
  .
  .
  This APAR will be fixed in the following Java Releases:
     8    SR7 FP10  (8.0.7.10)
  .
  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

  JAVA CLASS LIBS

• Fixed component ID

  620700130

Applicable component levels