IntelliJ IDEA 运行占用端口报错

错误: 代理抛出异常错误: java.rmi.server.ExportException: Port already in use: 9999; nested exception is:
java.net.BindException: Address already in use (Bind failed)

解决方法

mac 终端运行命令 ：
lsof -i:9999
kill [PID]