严重: The web application [/Test] 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.
2014-4-25 22:36:52 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [/Test] 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.
2014-4-25 22:36:52 org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
严重: The web application [/Test] created a ThreadLocal with key of type [com.opensymphony.xwork2.inject.ContainerImpl$10] (value [com.opensymphony.xwork2.inject.ContainerImpl$10@3096fa7b]) and a value of type [java.lang.Object[]] (value [[Ljava.lang.Object;@816ba29]) 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.
2014-4-25 22:36:55 org.apache.catalina.startup.TaglibUriRule body
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The web application [/Test] 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.
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------解决方案--------------------
应该算是警告吧，是 Tomcat 里的 ThreadLocalLeakPreventionListener 和 JreMemoryLeakPreventionListener 检查发出的，原因日志里说很清楚了。解决办法我是写个 ServletContextListener，在 contextDestroyed 方法里把能处理的处理掉：数据库驱动可以解除注册；ThreadLocal 估计没办法，怪 struts 去吧。
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在listener里面注销数据库驱动