IJ29137: INCOMPATIBLECLASSCHANGEERROR BECAUSE A CLASS HAS CONFLICTING DEFAULT METHODS

APAR status

• Closed as program error.

Error description

• Error Message: This is the error message from the javacore file:
  1TISIGINFO     Dump Event "systhrow" (00040000) Detail
  "java/lang/IncompatibleClassChangeError" "class
  java/util/TreeMap has conflicting defaults for method
  computeIfAbsent(Ljava/lang/Object;Ljava/util/function/Function;)
  Ljava/lang/Object;" received
  .
  Stack Trace: N/A
  .
  

Local fix

Problem summary

• The problem is caused when the vTable of a class is not updated
  properly after its super interface class is redefined.
  

Problem conclusion

• The JVM has been updated to prevent the
  IncompatibleClassChangeError from occurring when a super
  interface class is redefined.
  .
  This APAR will be fixed in the following Java Releases:
     8    SR6 FP25  (8.0.6.25)
  .
  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

  J9 COMMON CODE

• Fixed component ID

  620700127

Applicable component levels

• R270 PSY

     UP