日志如下:
2013-9-9 13:50:20 org.apache.catalina.core.StandardWrapper unload
信息: Waiting for 34 instance(s) to be deallocated
2013-9-9 13:50:22 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
严重: The web application [] is still processing a request that has yet to finish. This is very likely to create a memory leak. You can control the time allowed for requests to finish by using the unloadDelay attribute of the standard Context implementation.