Error while running survlet: http status 505

Question

Hii all,
I have a problem in running servlet from my Firefox and I am using Tomcat 5.5.25. I having a problem in deploying the servlet.
I ran my servlet as:http://localhost:8085/log?user_name=******&password=*****
Servlet Maping looks like this:
<?xml version="1.0" encoding="ISO-8859-1"?>
<!--
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<!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 xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
version="2.4">
<display-name>Welcome to Tomcat</display-name>
<description>
Welcome to Tomcat
</description>
<servlet>
     <servlet-name>Aboutus</servlet-name>
     <servlet-class>AboutusServlet</servlet-class>
</servlet>
<servlet>
     <servlet-name>Login</servlet-name>
     <servlet-class>LoginServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Aboutus</servlet-name>
     <url-pattern>/aboutus</url-pattern>
</servlet-mapping>
<servlet-mapping>
     <servlet-name>Login</servlet-name>
     <url-pattern>/log</url-pattern>
</servlet-mapping>
</web-app>
Below is my servlet code looks like,
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.sql.*;
public class LoginServlet extends HttpServlet
     ServletOutputStream sos;
     Connection con;
     Statement st,st1,st2;
     ResultSet rs,rs1,rs2;
     public void doGet(HttpServletRequest req,HttpServletResponse res) throws ServletException,IOException
          String logvalid="";
     String medicine="";
//String destination="";
     try
               Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
               con=DriverManager.getConnection("jdbc:odbc:health","scott","tiger");
               System.out.println("Connection Successfull");
               String user_id=req.getParameter("user_id");
               String pass=req.getParameter("pass");
               res.setContentType("text/html");
               sos=res.getOutputStream();     
               System.out.println("username:"+user_id+"pass:"+pass);
               String query="select user_id,pass from newuser where user_id='"+user_id+"' and pass='"+pass+"'";
                              System.out.println(query);
               st=con.createStatement();
               rs=st.executeQuery(query);
               ResultSetMetaData rsmd= rs.getMetaData();
          /*     int count=rsmd.getColumnCount();
               System.out.println("$$$$$$$$$$$$$$$$"+count);*/
               System.out.println("value of rs="+rs);
               if(rs!=null)
                    System.out.println("rs not null");
               if(rs.next())
                    System.out.println("inside while");
                    if(user_id.equals(rs.getString(1)) && pass.equals(rs.getString(2)))
                         System.out.println("inside if");
                         logvalid="Valid";
                         System.out.println("valid");
String query1="select distinct medicine from prescription";
                         System.out.println(query1);
                         st1=con.createStatement();
                         rs1=st1.executeQuery(query1);
                    while(rs1.next())
                         source=source+rs1.getString(1)+"$";
                    //String query2="select distinct destination from route";
                    //System.out.println(query2);
               //st2=con.createStatement();
               //rs2=st2.executeQuery(query2);
                         //     System.out.println(query2);
               /*while(rs2.next())
destination=destination+rs2.getString(1)+"$";
          }     // if loop for checking user id
     }     // end of if for rs.next()
     sos.println(logvalid+":"+medicine);
               }// // end of if for rs!=null
     if(rs==null)
          System.out.println("rs=null");
catch(Exception e)
               System.out.println(e);
     public void destroy()
          try
               con.close();
               sos.close();
               rs.close();
               st.close();
               catch(Exception e)
                    System.out.println(e);
Here is the error report:
HTTP Status 500 -

Answer 1

Hi all,
The issue is solved now.It was an silly mistake in the source code. I haven't extend the class.
Thanks,
Senthil.