Java.lang.Exception,java.rmi.RemoteException

Question

Hi ,
Whem I'm deploying my appliucation on WLS 10.3 I'm getting the following exception.
####<Nov 13, 2008 1:32:21 PM IST> <Warning> <EJB> <swetha> <AdminServer> <[STANDBY] ExecuteThread: '1' for queue: 'weblogic.kernel.Default (self-tuning)'> <<WLS Kernel>> <> <> <1226563341175> <BEA-012035> <The Remote interface method: 'public abstract java.util.Collection com.bt.resmgt.aam.model.absence.book.AttendanceManager.findAbsences(com.bt.fieldpeople.security.models.Subject,com.bt.resmgt.aam.model.employee.Employee,java.util.List,java.lang.String,java.lang.String,java.util.List,java.util.Date,java.util.Date,java.util.Date,boolean,boolean,boolean,boolean,boolean,boolean,boolean,java.lang.String[]) throws java.lang.Exception,java.rmi.RemoteException' in EJB 'AttendanceManager' contains a parameter of type: 'java.util.List' which is not Serializable. Though the EJB 'AttendanceManager' has call-by-reference set to false, this parameter is not Serializable and hence will be passed by reference. A parameter can be passed using call-by-value only if the parameter type is Serializable.>
could anybody please help me out?
any type of jelp will be greatly appreciated.
Thanks,
Neeraj

Answer 1

Your problem is here:
«'java.util.List' which is not Serializable»
You're trying to deploy a remote bean. Local beans can work with a parameter that isn't serializable, because their access is made by reference (pointers). But for remote beans, the whole object must be serialized and send over the network to be received by the client. Thus, the java.util.List can't be serialised, so WL complains.
You must choose a container that can be serialized like java.util.ArrayList, a LinkedList or a vector in case of lists, or use local beans. Anyway, I think serialised objects should always be used with bean functions parameters.