tomcat关闭时出现这样的错误是什么原因?

taozhhong 07-05-07

tomcat启动后五六个小时,布署的应用就会出停止...只有重启tomcat才行.报出的错误信息如下,这是什么原因造成的啊?
2007-5-7 13:04:32 org.apache.catalina.loader.WebappClassLoader loadClass
信息: Illegal access: this web application instance has been stopped already. Could not load java.lang.System. The eventual following stack trace is caused by an error thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access, and has no functional impact.