Rmi连接被localhost拒绝 [英] Rmi connection refused with localhost

问题描述

我有一个问题使用java rmi：

I have a problem using java rmi:

当我试图运行我的服务器，我得到一个connectException（见下文）。

When I'm trying to run my server, I get a connectException (see below).

执行重新绑定方法时发生异常：

Exception happens when executing the rebind method:

Runtime.getRuntime().exec("rmiregistry 2020");
MyServer server = new MyServer();
Naming.rebind("//localhost:2020/RemoteDataPointHandler", server);

也使用默认端口不工作。我也尝试使用127.0.0.1的ip地址，但效果相同。

when using rmi://localhost:2020/RemoteDataPointHandler instead, it doesn't work either. Also using the default port does not work. I also tried using the 127.0.0.1 ip-address, but with the same effect.

我的运行时参数：

-Djava.security.policy=java.security.AllPermission

Exception in thread "main" java.rmi.ConnectException: Connection refused to host: localhost; nested exception is: 
    java.net.ConnectException: Connection refused
    at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:574)
    at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:185)
    at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:171)
    at sun.rmi.server.UnicastRef.newCall(UnicastRef.java:306)
    at sun.rmi.registry.RegistryImpl_Stub.rebind(Unknown Source)
    at java.rmi.Naming.rebind(Naming.java:160)
    at be.fortega.knx.server.Main.(Main.java:25)
    at be.fortega.knx.server.Main.main(Main.java:16)
Caused by: java.net.ConnectException: Connection refused
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
    at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:433)
    at java.net.Socket.connect(Socket.java:524)
    at java.net.Socket.connect(Socket.java:474)
    at java.net.Socket.(Socket.java:371)
    at java.net.Socket.(Socket.java:184)
    at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:22)
    at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:128)
    at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:569)
    ... 7 more

推荐答案

当我替换

Runtime.getRuntime().exec("rmiregistry 2020");

由

LocateRegistry.createRegistry(2020);

任何人的想法为什么？有什么区别？

anyone an idea why? What's the difference?

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