HTTP Status 500 -

type Exception report

message

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

exception

javax.servlet.ServletException: Cannot allocate servlet instance for path /servlet/tsa2
	org.apache.catalina.servlets.InvokerServlet.serveRequest(InvokerServlet.java:388)
	org.apache.catalina.servlets.InvokerServlet.doGet(InvokerServlet.java:133)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

root cause

java.lang.NoClassDefFoundError: javax/servlet/http/HttpServlet
	java.lang.ClassLoader.defineClass1(Native Method)
	java.lang.ClassLoader.defineClass(ClassLoader.java:620)
	java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
	java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
	java.net.URLClassLoader.access$100(URLClassLoader.java:56)
	java.net.URLClassLoader$1.run(URLClassLoader.java:195)
	java.security.AccessController.doPrivileged(Native Method)
	java.net.URLClassLoader.findClass(URLClassLoader.java:188)
	java.lang.ClassLoader.loadClass(ClassLoader.java:306)
	sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
	java.lang.ClassLoader.loadClass(ClassLoader.java:251)
	org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1247)
	org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1181)
	org.apache.catalina.servlets.InvokerServlet.serveRequest(InvokerServlet.java:369)
	org.apache.catalina.servlets.InvokerServlet.doGet(InvokerServlet.java:133)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

note The full stack trace of the root cause is available in the Apache Tomcat/5.5.9 logs.

Apache Tomcat/5.5.9