Java RMI:ConnectException:连接超时:连接
我意识到这个问题已经被问了很多次,也被回答了很多次(通常来自EJP,他很清楚自己的能力!),但我仍然在挣扎 我“偷”了一个简单的RMI添加服务器和客户端。 (谢谢, 然后,谁又对P.诺顿和H.席尔德的《Java 2:完整参考》第24章给予了肯定。) 无论我尝试什么,我仍然会遇到“连接超时”异常。 有人能看出我做错了什么吗 我怀疑防火墙出了什么问题,但如果是这样,我不知道该告诉我的IT人员如何修复和更改 提前谢谢 接口:Java RMI:ConnectException:连接超时:连接,java,connection,rmi,connectexception,Java,Connection,Rmi,Connectexception,我意识到这个问题已经被问了很多次,也被回答了很多次(通常来自EJP,他很清楚自己的能力!),但我仍然在挣扎 我“偷”了一个简单的RMI添加服务器和客户端。 (谢谢, 然后,谁又对P.诺顿和H.席尔德的《Java 2:完整参考》第24章给予了肯定。) 无论我尝试什么,我仍然会遇到“连接超时”异常。 有人能看出我做错了什么吗 我怀疑防火墙出了什么问题,但如果是这样,我不知道该告诉我的IT人员如何修复和更改 提前谢谢 接口: public interface AddServerIntf extends
public interface AddServerIntf extends Remote {
double add(double d1, double d2) throws RemoteException;
}
服务器:
public class SimpleRMIExServer {
public static void main(String[] args) throws Exception {
System.out.println("Class name " + SimpleRMIExServer.class.getSimpleName());
System.out.println("Path " + System.getProperty("user.dir"));
System.setProperty("java.rmi.server.codebase",
"file:///D:\\SimpleRMIExample\\lib\\SimpleRMIExample.jar");
Registry registry;
try {
registry = LocateRegistry.createRegistry(1099);
} catch (RemoteException remoteException) {
registry = LocateRegistry.getRegistry(1099);
}
AddServerImpl addServerImpl = new AddServerImpl();
registry.bind("AddServer", addServerImpl);
System.out.println("Located Registry " + registry.toString());
for (String boundName : registry.list()) {
System.out.println("Name bound: " + boundName);
}
Naming.rebind("SERVERNAME", addServerImpl);
System.out.println("Registry: " + registry);
System.out.println("");
System.out.println("Remote: " + addServerImpl);
}
}
public class AddServerImpl extends UnicastRemoteObject implements AddServerIntf {
public AddServerImpl() throws RemoteException {
}
@Override
public double add(double d1, double d2) throws RemoteException {
return d1 + d2;
}
}
客户:
public class SimpleRMIExClient {
public static void main(String[] args) throws Exception {
final Registry registry = LocateRegistry.getRegistry("SERVERNAME", 1099);
AddServerIntf addServerIntf = (AddServerIntf) registry.lookup("AddServer");
System.out.println("The first number is: " + 10);
double d1 = Double.valueOf(10).doubleValue();
System.out.println("The second number is: " + 15);
double d2 = Double.valueOf(15).doubleValue();
System.out.println("The sum is: " + addServerIntf.add(d1, d2)); //Exception occurs here.
}
}
来自服务器的输出:
D:\>java -jar SimpleRMIExServer.jar
Class name SimpleRMIExServer
Path D:\
Located Registry RegistryImpl[UnicastServerRef [liveRef: [endpoint:[XX.XX.XX.XX:
1099](local),objID:[0:0:0, 0]]]]
Name bound: AddServer
Registry: RegistryImpl[UnicastServerRef [liveRef: [endpoint:[XX.XX.XX.XX:1099](l
ocal),objID:[0:0:0, 0]]]]
Remote: AddServerImpl[UnicastServerRef [liveRef: [endpoint:[XX.XX.XX.XX:54119](l
ocal),objID:[2a7202aa:14492e5ea89:-7fff, -5034491972061237368]]]]
来自客户端的输出:
debug:
The first number is: 10
The second number is: 15
Exception in thread "main" java.rmi.ConnectException: Connection refused to host: XX.XX.XX.XX; nested exception is:
java.net.ConnectException: Connection timed out: connect
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:619)
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:619)
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.invoke(UnicastRef.java:129)
at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(RemoteObjectInvocationHandler.java:194)
at java.rmi.server.RemoteObjectInvocationHandler.invoke(RemoteObjectInvocationHandler.java:148)
at com.sun.proxy.$Proxy0.add(Unknown Source)
at com.sun.proxy.$Proxy0.add(Unknown Source)
at simplermiexclient.SimpleRMIExClient.main(SimpleRMIExClient.java:35)
Caused by: java.net.ConnectException: Connection timed out: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79)
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.PlainSocketImpl.connect(PlainSocketImpl.java:172)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
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:147)
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:613)
... 7 more
Java Result: 1
BUILD SUCCESSFUL (total time: 1 minute 33 seconds)
(在许多其他行中)
我还看到:
LocalAddress ForeignAddress State
XX.XX.XX.XX:54138 SERVERNAME:1099 TIME_WAIT
编辑:
我试着加入:
System.setProperty("java.rmi.server.hostname", "SERVERNAME");
在设置codebase系统属性之后,根据EJP向许多其他人推荐的阅读Java RMI FAQ A.1的建议,立即发送到服务器
当我这样做时,这是堆栈跟踪:
debug:
The first number is: 10
The second number is: 15
Exception in thread "main" java.rmi.ConnectException: Connection refused to host: SERVERNAME; nested exception is:
java.net.ConnectException: Connection timed out: connect
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:619)
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:619)
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.invoke(UnicastRef.java:129)
at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(RemoteObjectInvocationHandler.java:194)
at java.rmi.server.RemoteObjectInvocationHandler.invoke(RemoteObjectInvocationHandler.java:148)
at com.sun.proxy.$Proxy0.add(Unknown Source)
at com.sun.proxy.$Proxy0.add(Unknown Source)
at simplermiexclient.SimpleRMIExClient.main(SimpleRMIExClient.java:35)
Caused by: java.net.ConnectException: Connection timed out: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79)
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.PlainSocketImpl.connect(PlainSocketImpl.java:172)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
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:147)
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:613)
... 7 more
Java Result: 1
BUILD SUCCESSFUL (total time: 1 minute 15 seconds)
调试:
第一个数字是:10
第二个号码是:15
线程“main”java.rmi.ConnectException中出现异常:拒绝连接到主机:SERVERNAME;嵌套异常是:
java.net.ConnectException:连接超时:连接
位于sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:619)
位于sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:619)
位于sun.rmi.transport.tcp.tcpcchannel.createConnection(tcpcchannel.java:216)
位于sun.rmi.transport.tcp.tcpcchannel.newConnection(tcpcchannel.java:202)
位于sun.rmi.server.UnicastRef.invoke(UnicastRef.java:129)
位于java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(RemoteObjectInvocationHandler.java:194)
位于java.rmi.server.RemoteObjectInvocationHandler.invoke(RemoteObjectInvocationHandler.java:148)
位于com.sun.proxy.$Proxy0.add(未知源)
位于com.sun.proxy.$Proxy0.add(未知源)
位于simplermexcient.simplermexcient.main(simplermexcient.java:35)
原因:java.net.ConnectException:连接超时:连接
位于java.net.DualStackPlainSocketImpl.connect0(本机方法)
位于java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79)
位于java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
位于java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
位于java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
位于java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
位于java.net.socksocketimpl.connect(socksocketimpl.java:392)
位于java.net.Socket.connect(Socket.java:579)
位于java.net.Socket.connect(Socket.java:528)
位于java.net.Socket。(Socket.java:425)
位于java.net.Socket(Socket.java:208)
位于sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:40)
位于sun.rmi.transport.proxy.rmismastersocketfactory.createSocket(rmismastersocketfactory.java:147)
位于sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:613)
... 还有7个
Java结果:1
构建成功(总时间:1分15秒)
回答我自己的问题:
我已经找到了问题的答案。我喜欢看到别人这样做,能自己说出来很好
我的最终解决方案是防火墙问题,但我想为任何人提供建议,让他们知道我是如何解决我的问题的
debug:
The first number is: 10
The second number is: 15
Exception in thread "main" java.rmi.ConnectException: Connection refused to host: SERVERNAME; nested exception is:
java.net.ConnectException: Connection timed out: connect
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:619)
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:619)
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.invoke(UnicastRef.java:129)
at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(RemoteObjectInvocationHandler.java:194)
at java.rmi.server.RemoteObjectInvocationHandler.invoke(RemoteObjectInvocationHandler.java:148)
at com.sun.proxy.$Proxy0.add(Unknown Source)
at com.sun.proxy.$Proxy0.add(Unknown Source)
at simplermiexclient.SimpleRMIExClient.main(SimpleRMIExClient.java:35)
Caused by: java.net.ConnectException: Connection timed out: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79)
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.PlainSocketImpl.connect(PlainSocketImpl.java:172)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
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:147)
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:613)
... 7 more
Java Result: 1
BUILD SUCCESSFUL (total time: 1 minute 15 seconds)