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Tomcat Error-HTTP Status code 500

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Operating Systems Solaris Tomcat Error-HTTP Status code 500
# 1  
Old 08-17-2009
Tomcat Error-HTTP Status code 500
when I typed path http://localhost:8080/MyFirst/HelloWorld in web-browser ,it came up with error
Code:
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: Error allocating a servlet instance
	org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
	org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
	org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:875)
	org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
	org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
	org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
	org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
	java.lang.Thread.run(Thread.java:595)
root cause 
java.lang.UnsupportedClassVersionError: Bad version number in .class file
	java.lang.ClassLoader.defineClass1(Native Method)
	java.lang.ClassLoader.defineClass(ClassLoader.java:620)
	java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
	org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:1876)
	org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:889)
	org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1353)
	org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1232)
	org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
	org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
	org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:875)
	org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
	org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
	org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
	org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
	java.lang.Thread.run(Thread.java:595)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.27 logs.

Files I placed in tomcat directory is web.xml in WEB-INF Directory, MyFirst.xml in /opt/apache-tomcat-5.5.27/conf/Catalina/localhost direcotry and HelloWorld.class in /opt/apache-tomcat-5.5.27/webapps/MyFirst/WEB-INF/classes directory

Code:
web.xml 
<?xml version="1.0" encoding="ISO-8859-1"?>

<!DOCTYPE web-app
    PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
    "http://java.sun.com/dtd/web-app_2_3.dtd">

<web-app>

<servlet>
        <servlet-name>HelloWorld</servlet-name>
        <servlet-class>HelloWorld</servlet-class>
</servlet>

<servlet-mapping>
        <servlet-name>HelloWorld</servlet-name>
        <url-pattern>/HelloWorld</url-pattern>
</servlet-mapping>

</web-app>

Code:
MyFirst.xml
<!-- MyFirst Context -->
<Context path="/MyFirst" docBase="MyFirst" debug="0" reloadable="true"/>

Code:
HelloWorld.java
File Edit Options Buffers Tools Java Help                                                                              
// Filename : HelloWorld.java                                                                                          
// Description : This servlet merely says hello!                                                                       


import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class HelloWorld extends HttpServlet {

    public void doGet ( HttpServletRequest request, HttpServletResponse response )
        throws ServletException, IOException    {

        response.setContentType("text/html");
        PrintWriter out = response.getWriter();

        out.println("<html>");
        out.println("<head><title>Hello, Cruel World!</title></head>");
        out.println("<body>");
        out.println("<h1>Hello, Cruel World !</h1>");
        out.println("This is my first servlet.");
        out.println("</body>");
    }// end doGet                                                                                                      

}///:~

Does anybody have about what the error messsage says?

---------- Post updated 08-17-09 at 02:20 AM ---------- Previous update was 08-16-09 at 11:24 AM ----------

Hello Freinds My Problem Solved thing is that I misused Jdk version instead of 1.6 I used 1.5 so the problem solved
Last edited by srinivas2828; 08-16-2009 at 12:29 PM.. Reason: spelling mistakes
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