IV82829: J9 ATTEMPTS CLASSLOADING FOR INSTANCEOF / CHECKCAST OF NULL OBJECTS

APAR status

• Closed as program error.

Error description

• Error Message: Exception in thread "main"
  java.lang.NoClassDefFoundError: "classname"
  .
  Stack Trace: N/A
  .
  

Local fix

Problem summary

• The JVM attempts to load the class referenced by an instanceof
  or checkcast bytecode even if the object being checked is null.
  

Problem conclusion

• The JVM has been updated to resolve the referenced class only if
  the object is not null.
  .
  This APAR will be fixed in the following Java Releases:
     7 R1 SR3 FP40  (7.1.3.40)
     8    SR3       (8.0.3.0)
     7 R1 SR3 FP40  (7.1.3.40)
     8    SR3       (8.0.3.0)
  .
  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:

  IV85529

Fix information

• Fixed component name

  J9 COMMON CODE

• Fixed component ID

  620700127

Applicable component levels

• R270 PSY

     UP