1 错误描述
Several ports (8005, 8080, 8009) required by Tomcat v7.0 Server at localhost are already in use.
The server may already be running in another process, or a system process may be using the port. To start this server you will need to stop the other process or change the port number(s).
2 错误原因
Tomcat进程端口在使用中
3 解决办法
关闭Tomcat进程
如何强制关闭Tomcat，同时杀死进程
一般的，我们都是使用 ps aux | grep "tomcat"，找到相应的进程id，然后用kill -9 id来强制关闭进程， 但是使用这样每次都要去做一趟这样的操作，实在是繁琐哇！ 于是，我们可以在shutdown.sh中编写杀死进程的代码，就可以了啊。
======修改============bin/shutdown.sh
exec "$PRGDIR"/"$EXECUTABLE" stop -force "$@" 加上 -force
======修改====================bin/catalina.sh
在PRGDIR=`dirname "$PRG"`后面加上
if [ -z "$CATALINA_PID" ]; then
CATALINA_PID=$PRGDIR/CATALINA_PID
cat $CATALINA_PID
fi