This week's giveaway is in the OCPJP forum. We're giving away four copies of Practice Tests for OCP Java 17 Certification Exam (1Z0-829) and have Paul Anilprem on-line! See this thread for details.
Check your jar files, if you have included jsp-api-2.0.jar in your jars remove it and then try it, i had encountered such problems too earlier
this problem occurs because of mixture of jar files