再次删除app1,就不会有上面的提示了。删除app1后我们观察日志输出：
信息: Undeploying context [/app1]
2012-6-3 23:27:02 org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
严重: The web application [/app1] created a ThreadLocal with key of type [com.opensymphony.xwork2.inject.ContainerImpl$10] (value [com.opensymphony.xwork2.inject.ContainerImpl$10@3ca56f]) and a value of type [Java.lang.Object[]] (value [[Ljava.lang.Object;@191394e]) 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.
2012-6-3 23:27:02 org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
严重: The web application [/app1] created a ThreadLocal with key of type [com.opensymphony.xwork2.inject.ContainerImpl$10] (value [com.opensymphony.xwork2.inject.ContainerImpl$10@3ca56f]) and a value of type [java.lang.Object[]] (value [[Ljava.lang.Object;@149494e]) 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.
2012-6-3 23:27:02 org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
严重: The web application [/app1] created a ThreadLocal with key of type [com.opensymphony.xwork2.inject.ContainerImpl$10] (value [com.opensymphony.xwork2.inject.ContainerImpl$10@3ca56f]) and a value of type [java.lang.Object[]] (value [[Ljava.lang.Object;@6bbb36]) 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.
2012-6-3 23:27:02 org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
严重: The web application [/app1] created a ThreadLocal with key of type [com.opensymphony.xwork2.inject.ContainerImpl$10] (value [com.opensymphony.xwork2.inject.ContainerImpl$10@3ca56f]) and a value of type [java.lang.Object[]] (value [[Ljava.lang.Object;@d006a7]) 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.
二、通过为Web应用程序添加一个特定的Context文件来实现动态部署
我们找到以下位置：conf/Catalina/localhost，这个目录代表什么？
Catalina代表server.xml文件里面配置的默认的Service的名称。
Localhost代表Service里面的默认虚拟主机名称。
我们现在就是要在这个虚拟主机里面部署我们的应用。
做法：
1、 创建一个xml文件，文件名和Web应用名相同：app1.xml。
2、 这个文件的内容如下：
a) <Context path="/app1" docBase="d:/app1" debug="0" privileged="true" workDir="d:/app1work"></Context>
3、 将这个文件拷贝到conf/Catalina/localhost下面,完整路径就是conf/Catalina/localhost/app1.xml，这时Tomcat会自动扫描到这个文件然后根据里面的描述加载应用上下文的。
4、 观察现在的日志输出：
l 信息: Deploying configuration descriptor E:\WorkSpace\JavaWorkspace\Tomcat 7.0\conf\Catalina\localhost\app1.xml
l 2012-6-3 23:41:23 org.apache.catalina.startup.SetContextPropertiesRule begin
l 警告: [SetContextPropertiesRule]{Context} Setting property 'debug' to '0' did not find a matching property.
l 2012-6-3 23:41:24 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info
l 信息: Parsing configuration file [struts-default.xml]
l 2012-6-3 23:41:24 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info
l 信息: Parsing configuration file [struts-plugin.xml]
l 2012-6-3 23:41:24 com.opensymphony.xwork2.util.logging.commons.CommonsLogger info
l 信息: Parsing configuration file [struts.xml]
5、 删除这个文件后，日志输出：
l 信息: Undeploying context [/app1]
l 2012-6-3 23:43:06 org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks
l 严重: The web application [/app1] created a ThreadLocal with key of type [com.opensymphony.xwork2.inject.ContainerImpl$10] (value [com.opensymphony.xwork2.inject.ContainerImpl$10@1f1a3a8]) and a value of type [java.lang.Object[]] (value [[Ljava.lang.Object;@12f9ee1]) 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.