org.apache.jasper.el.ELContextImpl cannot be cast to org.apache.jasper.runtime.ELContextImpl

Question

I have a web service project implemented in java and it also contains jsp pages. I deploy it on jetty 8.1.5 on my machine and it works normally. But when I deploy on a windo

Answer 1

That can happen if your webapp ships with servletcontainer-specific JAR files such as jasper.jar, jetty.jar servlet.jar, etc in the /WEB-INF/lib for some unclear reason. This is in turn conflicting with with a different versioned JAR file on the target servletcontainer.

Remove that servletcontainer-specific JAR file from your webapp's /WEB-INF/lib. It doesn't belong there. It's supposed to be already supplied by the servletcontainer itself.

See also:

• How do I import the javax.servlet API in my Eclipse project? (this doesn't exactly answer your concrete problem, but this is at least technically the same core problem which should give you a better understanding of this common starter's mistake)