6月19日，需要修改一個(gè)BUG，打開IDEA? debug起來 ，一直報(bào)錯(cuò)。

查看日志：View-Tool Windows-EventLog

16:43 Error running 'tomcat9': Address localhost:1099 is already in use

16:43 Error running 'tomcat9': Unable to open debugger port (127.0.0.1:5521): java.net.SocketException "Socket closed"

嘗試了各種修改JVM端口，重啟IDE，依然無效.

最后查看tomat日志：

19-Jun-2019 16:41:59.098 嚴(yán)重 [main] org.apache.catalina.core.StandardServer.await Failed to create server shutdown socket on address [localhost] and port [8005] (base port [8005] and offset [0])

java.net.BindException: Can't assign requested address (Bind failed)

at java.net.PlainSocketImpl.socketBind(Native Method)

at java.net.AbstractPlainSocketImpl.bind(AbstractPlainSocketImpl.java:387)

at java.net.ServerSocket.bind(ServerSocket.java:375)

at java.net.ServerSocket.<init>(ServerSocket.java:237)

at org.apache.catalina.core.StandardServer.await(StandardServer.java:582)

at org.apache.catalina.startup.Catalina.await(Catalina.java:726)

at org.apache.catalina.startup.Catalina.start(Catalina.java:672)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:350)

at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:492)

Can't assign requested address (Bind failed)?。。。?！

最后解決的方法是，在本機(jī)添加一個(gè)host:

127.0.0.1 localhost?