java - RMI 异常 "error marshalling arguments"

Question

我正在开发一个 RMI 项目，该项目有两个独立的客户端和服务器项目。我使用了启动rmiregistry。当我尝试运行我的服务器应用程序时，出现异常。

public class Runner extends UnicastRemoteObject {

    public Runner() throws RemoteException {
        try {
            ServerOperations so = new ServerSide();
            Naming.rebind("rmi://localhost:2000/MiveCoffeeService", so);
            System.out.println("Server is online.");

        } catch (RemoteException | MalformedURLException | FileNotFoundException ex) {
            Logger.getLogger(Runner.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    public static void main(String[] args) throws RemoteException {
        new Runner();
    }

}

异常(exception)情况是:

Sep 11, 2015 9:05:51 PM ir.nscogroup.coffeemive.Runner <init>
SEVERE: null
java.rmi.MarshalException: error marshalling arguments; nested exception is: 
    java.io.NotSerializableException: dataaccess.ServerSide
    at sun.rmi.registry.RegistryImpl_Stub.rebind(Unknown Source)
    at java.rmi.Naming.rebind(Naming.java:177)
    at ir.nscogroup.coffeemive.Runner.<init>(Runner.java:29)
    at ir.nscogroup.coffeemive.Runner.main(Runner.java:38)
Caused by: java.io.NotSerializableException: dataaccess.ServerSide
    at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1184)
    at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)
    ... 4 more

怎么了？

Answer 1

异常堆栈跟踪告诉您确切哪里出了问题:

java.io.NotSerializableException: dataaccess.ServerSide

您正在尝试序列化不可序列化的类 dataaccess.ServerSide。解决方案:让您的类和所有必要的组成类实现 Serializable 接口(interface)。