执行shutdown.sh之后，Web已经无法访问：
Tomcat关联java进程仍然存活：
#/home/apache-tomcat-7.0.34/bin/shutdown.sh
Using CATALINA_BASE: /home/apache-tomcat-7.0.34
Using CATALINA_HOME: /home/apache-tomcat-7.0.34
Using CATALINA_TMPDIR: /home/apache-tomcat-7.0.34/temp
Using JRE_HOME: /home/jdk1.6.0_34
Using CLASSPATH: /home/apache-tomcat-7.0.34/bin/bootstrap.jar:/home/apache-tomcat-7.0.34/bin/tomcat-juli.jar
# ps aux | grep 'java.*tomcat' | grep -v grep
root 22465 15.3 8.6 1294300 346264 pts/0 Sl 14:55 1:08 /home/jdk1.6.0_34/bin/java -Djava.util.logging.config.file=/home/apache-tomcat-7.0.34/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs=/home/apache-tomcat-7.0.34/endorsed -classpath /home/apache-tomcat-7.0.34/bin/bootstrap.jar:/home/apache-tomcat-7.0.34/bin/tomcat-juli.jar -Dcatalina.base=/home/apache-tomcat-7.0.34 -Dcatalina.home=/home/apache-tomcat-7.0.34 -Djava.io.tmpdir=/home/apache-tomcat-7.0.34/temp org.apache.catalina.startup.Bootstrap start
2013-1-8 15:02:53 org.apache.catalina.loader.WebappClassLoader clearReferencesJdbccatalina.out报内存泄露警告：
严重: The web application [] registered the JDBC driver [com.mysql.jdbc.Driver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
2013-1-8 15:02:53 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [] appears to have started a thread named [Thread-2] but has failed to stop it. This is very likely to create a memory leak.
2013-1-8 15:02:53 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [] appears to have started a thread named [thread-snatch-picture] but has failed to stop it. This is very likely to create a memory leak.
2013-1-8 15:02:53 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [] appears to have started a thread named [Xmemcached-Reactor-0] but has failed to stop it. This is very likely to create a memory leak.
2013-1-8 15:02:53 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [] appears to have started a thread named [Xmemcached-Reactor-1] but has failed to stop it. This is very likely to create a memory leak.
2013-1-8 15:02:53 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [] appears to have started a thread named [Xmemcached-Reactor-2] but has failed to stop it. This is very likely to create a memory leak.
2013-1-8 15:02:53 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [] appears to have started a thread named [Xmemcached-Reactor-3] but has failed to stop it. This is very likely to create a memory leak.
2013-1-8 15:02:53 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [] appears to have started a thread named [Xmemcached-Reactor-4] but has failed to stop it. This is very likely to create a memory leak.
2013-1-8 15:02:53 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [] appears to have started a thread named [Xmemcached-Reactor-5] but has failed to stop it. This is very likely to create a memory leak.
2013-1-8 15:02:53 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [] appears to have started a thread named [Xmemcached-Reactor-6] but has failed to stop it. This is very likely to create a memory leak.
2013-1-8 15:02:53 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [] appears to have started a thread named [Xmemcached-Reactor-7] but has failed to stop it. This is very likely to create a memory leak.
2013-1-8 15:02:53 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [] appears to have started a thread named [Heal-Session-Thread] but has failed to stop it. This is very likely to create a memory leak.
2013-1-8 15:02:53 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [] appears to have started a thread named [pool-2-thread-1] but has failed to stop it. This is very likely to create a memory leak.
2013-1-8 15:02:53 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [] appears to have started a thread named [pool-2-thread-2] but has failed to stop it. This is very likely to create a memory leak.
2013-1-8 15:02:53 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [] appears to have started a thread named [pool-2-thread-3] but has failed to stop it. This is very likely to create a memory leak.
2013-1-8 15:02:53 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [] appears to have started a thread named [pool-2-thread-4] but has failed to stop it. This is very likely to create a memory leak.
2013-1-8 15:02:53 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [] appears to have started a thread named [Timer-0] but has failed to stop it. This is very likely to create a memory leak.
2013-1-8 15:02:53 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [] appears to have started a thread named [MySQL Statement Cancellation Timer] but has failed to stop it. This is very likely to create a memory leak.
2013-1-8 15:02:53 org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
严重: The web application [] created a ThreadLocal with key of type [com.opensymphony.xwork2.inject.ContainerImpl$10] (value [com.opensymphony.xwork2.inject.ContainerImpl$10@b6c562]) and a value of type [java.lang.Object[]] (value [[Ljava.lang.Object;@1d97383]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.
2013-1-8 15:02:53 org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
严重: The web application [] created a ThreadLocal with key of type [com.opensymphony.xwork2.inject.ContainerImpl$10] (value [com.opensymphony.xwork2.inject.ContainerImpl$10@b6c562]) and a value of type [java.lang.Object[]] (value [[Ljava.lang.Object;@9a827]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.
2013-1-8 15:02:53 org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
严重: The web application [] created a ThreadLocal with key of type [com.opensymphony.xwork2.inject.ContainerImpl$10] (value [com.opensymphony.xwork2.inject.ContainerImpl$10@b6c562]) and a value of type [java.lang.Object[]] (value [[Ljava.lang.Object;@12e71f1]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.
2013-1-8 15:02:53 org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
严重: The web application [] created a ThreadLocal with key of type [com.opensymphony.xwork2.inject.ContainerImpl$10] (value [com.opensymphony.xwork2.inject.ContainerImpl$10@b6c562]) and a value of type [java.lang.Object[]] (value [[Ljava.lang.Object;@855793]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.
2013-1-8 15:02:53 org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
严重: The web application [] created a ThreadLocal with key of type [com.opensymphony.xwork2.inject.ContainerImpl$10] (value [com.opensymphony.xwork2.inject.ContainerImpl$10@b6c562]) and a value of type [java.lang.Object[]] (value [[Ljava.lang.Object;@5164df]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.
2 问题分析