Java RMI ServerException – java.lang.ClassNotFoundException：org.prog.rmi.RmiServer_Stub

我inheritance了一些Java RMI客户端/服务器代码，虽然它在一台机器上运行良好，但我还没能让它在我的开发环境中运行。

问题是当我使用以下java.exe -Djava.security.policy=conf\server.policy -SRC;. -Djava.library.path=. org.prog.rmi.RmiServer运行服务器时java.exe -Djava.security.policy=conf\server.policy -SRC;. -Djava.library.path=. org.prog.rmi.RmiServer java.exe -Djava.security.policy=conf\server.policy -SRC;. -Djava.library.path=. org.prog.rmi.RmiServer

我收到以下错误：

 java.rmi.ServerException: RemoteException occurred in server thread; nested exception is: java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is: java.lang.ClassNotFoundException: org.prog.rmi.RmiServer_Stub (no security manager: RMI class loader disabled) at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:396) at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:250) at sun.rmi.transport.Transport$1.run(Transport.java:159) at java.security.AccessController.doPrivileged(Native Method) at sun.rmi.transport.Transport.serviceCall(Transport.java:155) at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649) ... 

我的server.policy文件是

 grant { permission java.security.AllPermission; }; 

我的java代码：

  package org.prog.rmi; import java.rmi.Naming; import java.rmi.RemoteException; import java.rmi.RMISecurityManager; import java.rmi.server.UnicastRemoteObject; import java.rmi.registry.*; public class RmiServer extends UnicastRemoteObject implements RmiServerIntf { private BatchApi bapi; private String iniFileLocation; private String layoutOption; private int addressCount = 0; private RefInt apiHandle = new RefInt(); public RmiServer(String iniFileLocation,String layoutOption) throws RemoteException { super(); this.iniFileLocation = iniFileLocation; this.layoutOption = layoutOption; initAPI(); startupAPI(); openAPI(); } public static void main(String args[]) { System.out.println("RMI server started"); // Create and install a security manager if (System.getSecurityManager() == null) { System.setSecurityManager(new RMISecurityManager()); System.out.println("Security manager installed."); } else System.out.println("Security manager already exists."); try //special exception handler for registry creation { LocateRegistry.createRegistry(1099); System.out.println("java RMI registry created."); } catch (RemoteException e) { //do nothing, error means registry already exists System.out.println("java RMI registry already exists."); } try { //Instantiate RmiServer for (String arg: args){ System.out.println(arg); } RmiServer obj = new RmiServer(args[0],args[1]); // Bind this object instance to the name "RmiServer" Naming.rebind("//127.0.0.1/RmiServer", obj); System.out.println("PeerServer bound in registry"); } catch (Exception e) { System.err.println("RMI server exception:"); e.printStackTrace(); } } } 

我已经看到了与java.rmi.server.codebase相关的解决方案，但也没有任何运气设置

Answer 1

您没有使用rmic重新生成存根，或者注册表无法通过其类路径访问它。

Answer 2

经过一些进一步的调查并遵循RMI教程后，似乎端口1099上的RMI注册服务器出现问题。

当我在另一个端口（例如2005）上盯着RMI注册服务器并更改了这些代码行时

 LocateRegistry.createRegistry(2005); 

和

 Naming.rebind("//127.0.0.1:2055/RmiServer", obj); 

这成功运行没有错误，我的客户端能够连接。

我希望这个答案能帮助其他人解决这个错误。 如果有人需要更详细的信息，请告诉我。