KnowledgeBaseAdapter is Externalizable, but doesn't have the default constructor -------------------------------------------------------------------------------- Key: DROOLS-696 URL: https://issues.jboss.org/browse/DROOLS-696 Project: Drools Issue Type: Bug Affects Versions: 6.2.0.CR4 Reporter: Pavlo Romanenko Assignee: Mario Fusco https://issues.jboss.org/browse/DROOLS-671 - KnowledgeBaseAdapter was made Externalizable, but it doesn't have a default constructor. Now I during KnowledgeBaseAdapter serialization I get: "InvalidClassException: org.drools.impl.adapters.KnowledgeBaseAdapter; no valid constructor" StackTrace: java.io.InvalidClassException: org.drools.impl.adapters.KnowledgeBaseAdapter; no valid constructor at java.io.ObjectStreamClass$ExceptionInfo.newInvalidClassException(ObjectStreamClass.java:150) at java.io.ObjectStreamClass.checkDeserialize(ObjectStreamClass.java:768) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1772) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)