It's probably the el-api.jar (and possibly also el-ri.jar). Jsp 2.1 provides its own el-api (and I think perhaps el-ri as well, but I'm no expert on jsp -- I do all of my development in facelets).
I had this "java.lang.LinkageError: loader constraints violated when linking javax/el/ELResolver class" problem a couple of weeks ago with jetty. It was followed by some class-not-found/class-cast issues, which turned out to be fixed by insuring that the jetty & jetty jsp jars were the first item in the class path. On Tue, Nov 17, 2009 at 9:42 AM, beginner_prithvi <[email protected]> wrote: > > Hi Richard, > Thanks for immediate reply! > I tried removing servlet-API.jar, but still i am facing the same problem. > Can you please tell me the list of other jars which are supplied by the > container, so that i can try one by one, and will let you know soon the > results. > > > Richard Yee-3 wrote: >> >> Remove servlet-API.jar from your webapp. It is supplied by the >> container. >> >> Richard >> >> Sent from my iPhone >> > > > > > > -- > View this message in context: > http://old.nabble.com/loader-constraints-violated-when-linking-javax-el-ELResolver-class-error-tp26390522p26391131.html > Sent from the MyFaces - Users mailing list archive at Nabble.com. > >

