IJ32927: CLASSNOTFOUNDEXCEPTION FROM OBJECTINPUTSTREAM.READOBJECT

APAR status

• Closed as program error.

Error description

• Error Message: java.lang.ClassNotFoundException
  .
  Stack Trace: Caused by: java.lang.ClassNotFoundException:
   at java.lang.Class.forNameImpl(Native Method)
   at java.lang.Class.forName(Class.java:403)
   at
  java.io.ClassCache$FutureValue.get(ClassCache.java:190)
   at java.io.ClassCache.get(ClassCache.java:161)
   at
  java.io.ObjectInputStream.resolveClass(ObjectInputStream.java:79
  1)
   at
  java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.jav
  a:1974)
   at
  java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1
  857)
   at
  java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.j
  ava:2148)
   at
  java.io.ObjectInputStream.readObject0(ObjectInputStream.java:167
  9)
   at
  java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.ja
  va:2393)
   at
  java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:
  2317)
   at
  java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.j
  ava:2175)
   at
  java.io.ObjectInputStream.readObject0(ObjectInputStream.java:167
  9)
   at
  java.io.ObjectInputStream.readObjectImpl(ObjectInputStream.java:
  518)
   at
  java.io.ObjectInputStream.readObject(ObjectInputStream.java:456)
  .
  

Local fix

• -Dcom.ibm.enableClassCaching=false
  

Problem summary

• The assumption that the last user defined class loader (LUDCL)
  will not change during a call to readObject()/readUnshared() can
  only be made if user code is not invoked.
  

Problem conclusion

• Trigger a refresh of the cached LUDCL when a user method is
  invoked.
  .
  This APAR will be fixed in the following Java Releases:
   8 SR6 FP31 (8.0.6.31)
  .
  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

• R800 PSY

     UP