[톰캣7] Servlet.service() for servlet jsp threw exception 에러

심각: Servlet.service() for servlet jsp threw exception
java.lang.LinkageError: loader constraint violation: when resolving interface method "javax.servlet.jsp.JspApplicationContext.getExpressionFactory()Ljavax/el/ExpressionFactory;" the class loader (instance of org/apache/jasper/servlet/JasperLoader) of the current class, org/apache/jsp/WEB_002dINF/views/home_jsp, and the class loader (instance of org/apache/catalina/loader/StandardClassLoader) for resolved class, javax/servlet/jsp/JspApplicationContext, have different Class objects for the type javax/el/ExpressionFactory used in the signature
 at org.apache.jsp.WEB_002dINF.views.home_jsp._jspInit(home_jsp.java:23)

 

해결방안 - jsp-api 버전이 2.1로 되어있는데 2.2로 바꾸어주면 해결이 된다