每次尝试通过tomcat管理器取消部署/停止grails应用程序时，都会出现以下错误。
Aug 16, 2014 5:32:54 PM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
SEVERE: The web application [/rie] 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.
Aug 16, 2014 5:32:55 PM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
SEVERE: The web application [/rie] appears to have started a thread named [PoolCleaner[1114685649:1408190574406]] but has failed to stop it. This is very likely to create a memory leak.
我尝试通过不同的论坛，但没有得到正确的指示，任何帮助将非常感谢。 提前谢谢。