JAVA马绍尔群岛共和国。连接异常

Question

我目前正在阅读第一本Java书籍，并阅读了RMI章节。我复制了书中的所有内容，但我仍然对RMI有问题

这是错误的堆栈跟踪

java.rmi.ConnectIOException: Exception creating connection to: 192.168.0.110; nested exception is: 
    java.net.NoRouteToHostException: No route to host
    at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:632)
    at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:216)
    at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:202)
    at sun.rmi.server.UnicastRef.newCall(UnicastRef.java:340)
    at sun.rmi.registry.RegistryImpl_Stub.rebind(Unknown Source)
    at java.rmi.Naming.rebind(Naming.java:177)
    at MyRemoteImpl.main(MyRemoteImpl.java:15)
Caused by: java.net.NoRouteToHostException: No route to host
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:391)
    at java.net.Socket.connect(Socket.java:579)
    at java.net.Socket.connect(Socket.java:528)
    at java.net.Socket.<init>(Socket.java:425)
    at java.net.Socket.<init>(Socket.java:208)
    at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:40)
    at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:146)
    at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:613)
    ... 6 more

我真的不知道它是什么意思，所以在这里

如果你还需要什么，请询问并得到回答

谢谢

Answer 1

大多数时候是防火墙的原因，你可以尝试关闭防火墙来确认原因

service iptables stop

Answer 2

这不是问题。它表示尝试将套接字连接到远程地址和端口时出错。通常，由于防火墙的介入或中间路由器关闭，无法访问远程主机

见javadocshere

发生这种情况是因为您逐字复制了示例。必须用实际的工作主机地址替换192.168.0.110

跟踪中的这一行：

at java.rmi.Naming.rebind(Naming.java:177)

显示的是Naming.rebind()方法无法使用该IP地址。请检查服务器代码并在那里输入正确的IP地址。如果它不在代码中，请在配置文件中查找它