1，报错信息如下：
[root@ptbin]# ./shutdown.sh
Using CATALINA_BASE: /usr/local/app/apache-tomcat-6.0.37_9300
Using CATALINA_HOME: /usr/local/app/apache-tomcat-6.0.37_9300
Using CATALINA_TMPDIR: /usr/local/app/apache-tomcat-6.0.37_9300/temp
Using JRE_HOME: /usr/lib/jvm/Java
Using CLASSPATH: /usr/local/app/apache-tomcat-6.0.37_9300/bin/bootstrap.jar
Using CATALINA_PID: /var/tomcat/9300.pid
Jun 12, 2015 4:55:30 PM org.apache.catalina.startup.Catalina stopServer
SEVERE: Catalina.stop:
java.net.ConnectException: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:391)
at java.net.Socket.connect(Socket.java:579)
at java.net.Socket.connect(Socket.java:528)
at java.net.Socket.<init>(Socket.java:425)
at java.net.Socket.<init>(Socket.java:208)
at org.apache.catalina.startup.Catalina.stopServer(Catalina.java:422)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.apache.catalina.startup.Bootstrap.stopServer(Bootstrap.java:338)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:416)
Tomcat did not stop in time. PID file was not removed.
[root@ptbin]#
2，去看下pid是否存在：
[root@pt~]# ll /var/tomcat/
total 12
-rw-r–r–. 1 root root 5 Jun 12 15:41 9300.pid
[root@pt~]#
tomcat的pid确实存在，与这个pid无关
3，解决办法：
解决办法有多种
3.1 解决办法1：修改java项目的实现方式
可能项目中用到了ScheduledThreadPoolExecutor（可能是未接受stop消息导致的），导致了shutdown命令未能成功。将ScheduledThreadPoolExecutor改成spring的quartz调度就ok了。
3.2 解决办法2，加上-force强行stop掉
在catalina.sh里面
exec “PRGDIR"/"EXECUTABLE” stop -force “$@”
大家查看shutdown.sh的代码：
[root@ptbin]# vim shutdown.sh
PRG="$0"
while [ -h "$PRG" ] ; do
ls=`ls -ld "$PRG"`
link=`expr "$ls" : '.*-> \(.*\)$'`
if expr "$link" : '/.*' > /dev/null; then
PRG="$link"
else
PRG=`dirname "$PRG"`/"$link"
fi
done
PRGDIR=`dirname "$PRG"`
EXECUTABLE=catalina.sh
# Check that target executable exists
if [ ! -x "$PRGDIR"/"$EXECUTABLE" ]; then
echo "Cannot find $PRGDIR/$EXECUTABLE"
echo "The file is absent or does not have execute permission"
echo "This file is needed to run this program"
exit 1
fi
exec "$PRGDIR"/"$EXECUTABLE" stop "$@"
发现并没有echo “Tomcat did not stop in time. PID file was not removed.”的提示信息，那么报错信息肯定不是在shutdown.sh脚本里面，大家看到shutdown.sh最后有引用其它脚本exec "$PRGDIR"/"$EXECUTABLE" stop "$@"来关闭tomcat，再看到”$EXECUTABLE变量所指向的是catalina.sh，所以问题核心是在catalina.sh里面。
打开catalina.sh发现只有第453行里面有这样提示信息，如下：
433 if [ ! -z "$CATALINA_PID" ]; then
434 if [ -f "$CATALINA_PID" ]; then
435 while [ $SLEEP -ge 0 ]; do
436 kill -0 `cat "$CATALINA_PID"` >/dev/null 2>&1
437 if [ $? -gt 0 ]; then
438 rm -f "$CATALINA_PID" >/dev/null 2>&1
439 if [ $? != 0 ]; then
440 if [ -w "$CATALINA_PID" ]; then
441 cat /dev/null > "$CATALINA_PID"
442 else
443 echo "Tomcat stopped but the PID file could not be removed or cleared."
444 fi
445 fi
446 break
447 fi
448 if [ $SLEEP -gt 0 ]; then
449 sleep 1
450 fi
451 if [ $SLEEP -eq 0 ]; then
452 if [ $FORCE -eq 0 ]; then
453 echo "Tomcat did not stop in time. PID file was not removed."
454 fi
455 fi
456 SLEEP=`expr $SLEEP - 1 `
457 done
458 fi
看到关键代码判断 if [ $FORCE -eq 0 ]; 那么这里就是表明前面执行异常，但是不是force强行停止掉，所以要抛一个exception出来，告诉你没有stop成功。
那么，我们可以在这里设置一个force命令来让tomcat强行stop掉。