HttpServlet cannot be resolved to a type … is this a bug in eclipse?

Question

Every thing was fine and i was able to run this JSP project, suddenly some thing happened and mostly all my servlets getting unresolved error.

I know its because sp

Answer 1

A simple solution for me was to go to Properties -> Java Build Path -> Order and Export, then check the Apache Tomcat library. This is assumes you've already set Tomcat as your deployment target and are still getting the error.