Integrating Birt reports in JSP-Collection of common programming errors

Most likely you have some unnecessary JAR files in your WEB-INF/lib which are clashing with the ones already available with Tomcat. Specifically this class javax/servlet/jsp/tagext/TagSupport is found in jsp-api.jar

But at runtime, the tomcat server is finding a different version and this leads to NoClassDefFound error. Check to see if these JARS are duplciated. and remove them from the WEB-INF/lib