servletexception

I am trying iReport/JasperReport in JSF 2 But while i am generating The PDF i got this error. I searched and found some similar problems and solutions, but nothing worked. Sorry for posting the same question again. But I tried all the possible solutions i found, but none worked for me. Please help java.lang.IllegalStateException: getOutputStream() has already been called for this response at org.apache.catalina.connector.Response.getWriter(Response.java:637) at org.apache.catalina.connector.ResponseFacade.getWriter(ResponseFacade.java:214) at com.sun.faces.context.ExternalContextImpl

I am using sitemesh to decorate the pages. I am using a JSP page for this. The page worked fine until I used the <c:if> conditional tag. I have the jstl-impl-1.2.jar & sitemesh-3.0-alpha-1.jar files in the WEB-INF/lib folder. I have following tag library declarations in the jsp page: <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %> <%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn" %> <%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt" %> <%@ taglib uri="http://java.sun.com/jsp/jstl/sql" prefix="sql" %> I am using tomcat 7.0 with java 6. When I

I am developing web app using spring frame work, but i am getting following error in some of the jsp pages. javax.servlet.ServletException cannot be resolved to a type I have included servlet-api also but still same error message is displaying. How to over come this problem? I guess this may work, in Eclipse select your project → then click on project menu bar on top → goto to properties → click on Targeted Runtimes → now you must select a check box next to the server you are using to run current project → click Apply → then click OK button . That's it, give a try. Tiago It seems to me that