tomcat版本使用6.0.33的时候会出现很多问题，此版本引入了内存管理机制，很多jar包不符合标准。会出现如下等信息
十一月 18, 2011 2:17:12 下午 org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
严重: The web application registered the JDBC driver [org.logicalcobwebs.proxool.ProxoolDriver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
十一月 18, 2011 2:17:12 下午 org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
严重: The web application registered the JDBC driver [net.sourceforge.jtds.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.
十一月 18, 2011 2:17:12 下午 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application appears to have started a thread named [HouseKeeper] but has failed to stop it. This is very likely to create a memory leak.
十一月 18, 2011 2:17:12 下午 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application appears to have started a thread named [Thread-5] but has failed to stop it. This is very likely to create a memory leak.
十一月 18, 2011 2:17:12 下午 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application appears to have started a thread named [ActiveMQ Transport: tcp:///192.168.0.1:61616] but has failed to stop it. This is very likely to create a memory leak.
十一月 18, 2011 2:17:12 下午 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application appears to have started a thread named [ActiveMQ Transport: tcp:///192.168.0.1:61616] but has failed to stop it. This is very likely to create a memory leak.
十一月 18, 2011 2:17:12 下午 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application appears to have started a thread named [InactivityMonitor ReadCheck] but has failed to stop it. This is very likely to create a memory leak.
十一月 18, 2011 2:17:12 下午 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application appears to have started a thread named [InactivityMonitor WriteCheck] but has failed to stop it. This is very likely to create a memory leak.
十一月 18, 2011 2:17:12 下午 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application appears to have started a thread named [InactivityMonitor Async Task: java.util.concurrent.ThreadPoolExecutor$Worker@166ec4c[State = 0, empty queue]] but has failed to stop it. This is very likely to create a memory leak.
十一月 18, 2011 2:17:12 下午 org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
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@dba72d]) and a value of type [java.lang.Object[]] (value [[Ljava.lang.Object;@bc82f9]) but
failed to remove it when the web application was stopped. This is very likely to create a memory leak.
但是有时候不影响工程正常启动，建议使用老一点的版本或者使用tomcat7，把jar包整理一下。