HTTP Status 500 - No action instance for path /ypServlet could be created
type Status report
message No action instance for path /ypServlet could be created
description The server encountered an internal error (No action instance for path /ypServlet could be created) that prevented it from fulfilling this request.
Apache Tomcat/6.0.13
查看/ypServlet web.xml中对应配置是否正确。路径找不到！
应该是这个/ypServlet没有对应servlet(action)或者这个名字你敲错了。