Are there any plans to support the serialization of thread objects?
Threads will NOT be serializable. In the present implementation, if you attempt to serialize and then deserialize a thread, there is NO explicit allocation of a new native thread or stack; all that happens is that the object is allocated system resources with none of the native implementation. In short, it just won’t work and will fail in unpredictable ways. The difficulty with threads is that they have so much state which is intricately tied into the virtual machine that it is difficult or impossible to re-establish the context somewhere else. For example, saving the JVM call stack is insufficient because if there were native methods that had called C procedures that in turn called code for the Java platform, there would be an incredible mix of Java programming language constructs and C pointers to deal with. Also, serializing the stack would imply serializing any object reachable from any stack variable. If a thread were resumed in the same VM, it would be sharing a lot of state with
