I am facing an issue with server serialization of HashMap variables. I have a public HashMap of (<String, String>) as class variable in a controller class. While running in a cluster environment, if the active managed server is shutdown, the control switches over to the other managed server. But I am not getting the previous keys and values of the HashMap variable in the 2nd server. Content of the HashMap variable is wiped out during the switch of the server.
Is HashMap not serializable? Any clue why this might happen?