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java.lang.NullPointerException at weblogic.ejb20.internal.HandleImpl.readExternal(HandleImpl.java:101) at java.io.ObjectInputStream.inputObject(ObjectInputStream.java:1212) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:386) at java.io.ObjectInputStream.inputClassFields(ObjectInputStream.java:2263) at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:519) at java.io.ObjectInputStream.inputObject(ObjectInputStream.java:1412) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:386) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:236) at java.util.ArrayList.readObject(ArrayList.java:531) at java.lang.reflect.Method.invoke(Native Method) at java.io.ObjectInputStream.invokeObjectReader(ObjectInputStream.java:2214) at java.io.ObjectInputStream.inputObject(ObjectInputStream.java:1411) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:386) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:236)