为什么每次启动tomcat，在停止的时候，都不能完全停止？

[mQney]

[root@localhost ~]# catalina.sh start &

[1] 12969
[root@localhost ~]# Using CATALINA_BASE: /usr/local/tomcat
Using CATALINA_HOME: /usr/local/tomcat
Using CATALINA_TMPDIR: /usr/local/tomcat/temp
Using JRE_HOME: /usr/local/java

[1]+ Done catalina.sh start

[root@localhost ~]# catalina.sh stop
Using CATALINA_BASE: /usr/local/tomcat
Using CATALINA_HOME: /usr/local/tomcat
Using CATALINA_TMPDIR: /usr/local/tomcat/temp
Using JRE_HOME: /usr/local/java

[root@localhost ~]# ps aux |grep catalina

root 12976 57.1 20.1 1717488 414936 pts/0 Sl 09:51 0:45 /usr/local/java/bin/java -Xms1024m -Xmx1024m -XX:MaxNewSize=256m -XX:MaxPermSize=256m -Djava.util.logging.config.file=/usr/local/tomcat/conf/logging.properties -Djava.endorsed.dirs=/usr/local/tomcat/endorsed -classpath :/usr/local/tomcat/bin/bootstrap.jar -Dcatalina.base=/usr/local/tomcat -Dcatalina.home=/usr/local/tomcat -Djava.io.tmpdir=/usr/local/tomcat/temp org.apache.catalina.startup.Bootstrap start

root 13191 0.0 0.0 62464 740 pts/0 S+ 09:53 0:00 grep catalina

[flyxxxxx]

最大的可能是有线程挂起了。