Mysterious Eclipse JSP Validation Errors

Question

Eclipse (Helios) occasionally marks valid looking JSP content as having errors. It seems like it often breaks when I use the tag. For example, in a JSP with just th

Answer 1

I had the same problem, the problem is the jsp-api library, you can add the dependency to your pom (as explained in other answers) or you can also add the target run-time and eclipse will automatically add that library to your class-path:

Project -> Properties -> Targeted Runtimes 

And select your server.