2015-6-9 17:11:45 org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
严重: The web application [/XXTServer] 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.
2015-6-9 17:11:45 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [/XXTServer] appears to have started a thread named [commons-pool-EvictionTimer] but has failed to stop it. This is very likely to create a memory leak.
2015-6-9 17:11:45 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [/XXTServer] appears to have started a thread named [net.sf.ehcache.CacheManager@4391f0] but has failed to stop it. This is very likely to create a memory leak.
2015-6-9 17:11:45 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [/XXTServer] appears to have started a thread named [Abandoned connection cleanup thread] but has failed to stop it. This is very likely to create a memory leak.
2015-6-9 17:11:45 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [/XXTServer] 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.
tomcat常常运行一段时间后自动停止，也不闪退，就卡在那儿……启动时正常；关闭的时候显示没有响应，强行结束进程后日志中报错。
这个问题困扰了我好久！某厂人一天要找我好多次说平台登录不上了，我就只能守在实验室重启tomcato(╯□╰)o
网上好多人说这是数据库连接没有释放，得从程序上改。我纳闷的是为什么本地开发的时候从来没有这样的问题，独独发布到服务器上就成这样了？！
后来抱着死马当活马医的心态修改了tomcat的内存设置，它好了……Σ( ° △ °|||)︴