Jetty (Embed) ".. ExpressionFactoryImpl not found"

org.apache.jasper.JasperException: /retrieve.jsp(39,17) PWC6038: "${myParam.value}" contains invalid expression(s): javax.el.ELException: Provider com.sun.el.ExpressionFactoryImpl not found

        at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:81)

< 해결책 >

com.sun.el-*.jar 파일을 import한다. (예: com.sun.el-2.2.0.v201108011116.jar)