Tomcat服务器重启失败：The server may already be running in another process, or a system process may be using the port.

在控制台重启Tomcat服务器，报错如下：

原因分析：

You've another instance of Tomcat already running. You can confirm this by going to http://localhost:8080 in your webbrowser and check if you get the Tomcat default home page or a Tomcat-specific 404 error page. Both are equally valid evidence that Tomcat runs fine; if it didn't, then you would have gotten a browser specific HTTP connection timeout error message.

解决办法：

You need to shutdown it. Go to /bin subfolder of the Tomcat installation folder and execute the shutdown.bat (Windows) or shutdown.sh (Unix) script

感谢：http://stackoverflow.com/questions/5064733/several-ports-8005-8080-8009-required-by-tomcat-server-at-localhost-are-alre