Exception in thread "main" javax.naming.ServiceUnavailableException [Root exception is java.rmi.ConnectException: Connection refused to host: localhost; nested exception is:

这个异常通常是因为服务无法连接到本地主机导致的。可能有几种原因导致这种情况发生：

1. 服务未正确启动或已停止。请检查服务是否正在运行，并确保已经启动。

2. 防火墙或网络配置可能会阻止服务连接到本地主机。请检查您的网络设置和防火墙设置，以确保服务可以连接到本地主机。

3. 如果您正在使用远程连接，请确保您已经正确配置了连接。请检查您的连接字符串、端口号、用户名和密码等信息，以确保它们是正确的。

如果以上方法都不起作用，您可以尝试重新启动服务或重新安装服务，以解决该问题。

相关问题

java java.io.IOException: Failed to retrieve RMIServer stub: javax.naming.ServiceUnavailableException [Root exception is java.rmi.ConnectException: Connection refused to host: localhost; nested exception is: java.net.ConnectException: Connection refused: connect]

This error message indicates that there was an issue with connecting to a remote Java RMI server. The error is caused by a connection failure, which prevents the client from retrieving the remote stub for the RMI server.

The most likely cause of this error is that the RMI server is not running or is not accessible from the client. It's also possible that there is a firewall or network configuration issue that is preventing the client from connecting to the server.

To troubleshoot this error, you can try the following steps:

1. Verify that the RMI server is running and accessible from the client. Check that the server is listening on the correct port and that there are no network issues that could be preventing the client from connecting.

2. Check the firewall settings to ensure that the required ports are open for RMI communication.

3. Verify that the naming service is running and that the RMI server is registered correctly with the naming service.

4. Check the server logs to see if there are any error messages that could provide more information about the cause of the connection failure.

5. If all else fails, try restarting the RMI server and the client to see if that resolves the issue.

If none of these steps solve the problem, you may need to consult the Java RMI documentation or seek assistance from a Java developer or system administrator.

application server was not connected before run configuration stop, reason: java.io.ioexception: failed to retrieve rmiserver stub: javax.naming.serviceunavailableexception [root exception is java.rmi.connectexception: connection refused to host: localhost; nested exception is: java.net.connectexception: connection refused: connect]

在运行配置停止之前，应用程序服务器没有连接，原因是：java.io.IOException：无法检索RMI服务器存根：javax.naming.ServiceUnavailableException [根本异常是java.rmi.ConnectException：连接到主机被拒绝：localhost；嵌套异常是：java.net.ConnectException：连接被拒绝：连接]。