HTTP Status 500 - Servlet execution threw an exception


type Exception report

message Servlet execution threw an exception

description The server encountered an internal error that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: Servlet execution threw an exception
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

root cause

java.lang.NoClassDefFoundError: org/apache/xml/serialize/BaseMarkupSerializer
	com.ignitionlabs.servlets.RSSServlet.doGet(RSSServlet.java:78)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:620)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

root cause

java.lang.ClassNotFoundException: org.apache.xml.serialize.BaseMarkupSerializer
	org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1720)
	org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571)
	com.ignitionlabs.servlets.RSSServlet.doGet(RSSServlet.java:78)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:620)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

note The full stack trace of the root cause is available in the Apache Tomcat/7.0.54 logs.


Apache Tomcat/7.0.54