500 Servlet Error
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I'm getting this error?HTTP Status 500 - Servlet execution threw an exception? up vote 0 down vote favorite I've create the DB, And the table name is 1.employee(master), 2.department. I've use the SQL inner join method to display the results in join format. then I'm trying to update the employee table, I'm getting this kind of error. the error was: > HTTP Status 500 servlet exception uscis 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 > > root cause > > java.lang.Error: Unresolved compilation problem: > setDep_id cannot be resolved or is not a field > > com.controller.UserController.doPost(UserController.java:85) > javax.servlet.http.HttpServlet.service(HttpServlet.java:643) > javax.servlet.http.HttpServlet.service(HttpServlet.java:723) And in the error is following line as: 1.controller.java protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { User user=new User(); user.setEmpName(request.getParameter("empName")); user.setEmpAddress(request.getParameter("empAddress")); user.setDep_id(request.getParameter("dep_id")); String emp_id=request.getParameter("emp_id"); if(emp_id!=null && !emp_id.toString().equalsIgnoreCase("")) { user.setEmp_id(Integer.parseInt(emp_id)); dao.updateUser(user); } else { dao.addUser(user); } RequestDispatcher view=request.getRequestDispatcher(EMPLOYEE_LIST); request.setAttribute("users", dao.getAllUsers()); view.forward(request, response); } 2.User.java : package; class public int dep_id; public int getDep_id() { return dep_id; } public void setDep_id(int dep_id) { this.dep_id=dep_id; } public String toString() { return "User[emp_id="+emp_id+"]"; } java mysql servlets post share|improve this question edited Feb 12 '14 at 9:04 asked Feb 12 '14 at 7:33 jmail 2,9672723 What do you think setDep_id cannot be resolved or is not a field means? You can see exactly w
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x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Java http://stackoverflow.com/questions/21721449/why-im-getting-this-errorhttp-status-500-servlet-execution-threw-an-exceptio servlet throw http 500 error on purpose up vote 1 down vote favorite I am developing a java servlet. I am using glassfish server 4. End users are sending me information through URL parametars, something like this: http://myIP:8080/TestProject/TestServlet?param1=test1¶m2=test2¶m3=test3 I am getting the values from param1, param2 and param3 and i want to write them in my database. If I get a SQL exception while http://stackoverflow.com/questions/20772837/java-servlet-throw-http-500-error-on-purpose writing the informations in my db i want to throw "500 Internal Server Error" to let them know that i have some technical problems and to resend their request. I want to know is there a default way to do this, set some status, display text ...? Here is the code: @WebServlet(urlPatterns = {"/TestServlet"}, initParams = { @WebInitParam(name = "param1", value = ""), @WebInitParam(name = "param2", value = ""), @WebInitParam(name = "param3", value = "")}) public class TestServlet extends HttpServlet { String param1; String param2; String param3; boolean dbOK; /** * Processes requests for both HTTP * GET and * POST methods. * * @param request servlet request * @param response servlet response * @throws ServletException if a servlet-specific error occurs * @throws IOException if an I/O error occurs */ protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //Get parametars from the request param1 = request.getParameter("param1"); param2 = request.getParameter("param2"); param3 = request.getParameter("param3"); //Input in db dbOK = Database.saveParams(param1,param2,param3); //Print response response.setContentType("text/html;charset=UTF-8"); PrintWriter out = response.getWriter(); try { /* TODO output your page here. You may use following sample code. */ out.println(""); out.println(""); out.println("
Java JSRs Mobile Certification https://coderanch.com/t/354085/Servlets/java/http-error-ServletException-allocate-servlet Databases Caching Books Engineering Languages Frameworks Products This http://answers.microsoft.com/en-us/ie/forum/ie8-windows_7/500-servlet-exception-when-trying-to-go-to-a/8c9d0eed-9fc1-4074-a89e-e54009e79350 Site Careers Other all forums Forum: Servlets http error 500 ServletException: Cannot allocate servlet instance... Andres Gonzalez Ranch Hand Posts: 1561 posted 14 years ago Hi, I'm getting an servlet error HTTP Status 500 - Internal server error when running a servlet called ServletSimplePublisher I'm using tomcat 4.0.1. The error is somethin' like this: exception javax.servlet.ServletException: Cannot allocate servlet instance for path /openjms/servlet/ServletSimplePublisher at org.apache.catalina.servlets.InvokerServlet.serveRequest(InvokerServlet.java:415) at org.apache.catalina.servlets.InvokerServlet.doGet(InvokerServlet.java:180) at javax.servlet.http.HttpServlet.service(HttpServlet.java:740) . 500 servlet exception . . root cause java.lang.NoClassDefFoundError: ServletSimplePublisher (wrong name: openjms/examples/client/console/ServletSimplePublisher) at java.lang.ClassLoader.defineClass0(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:493) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:111) . . . any ideas I'm not going to be a Rock Star. I'm going to be a LEGEND! --Freddie Mercury Tim Holloway Saloon Keeper Posts: 18304 56 I like... posted 14 years ago You need the following file in the place indicated: WEB-INF/classes/openjms/examples/client/console/ServletSimplePublisher.class or for Windows, its backslashed equivalent. And the name of the class file and all its parent directories up to and including "WEB-INF" MUST be capitalized exactly as shown. Even though the Windows filesystem is case-independent, Java has other ideas. The JAR equivalent would be: openjms/examples/client/console/ServletSimplePublisher.class Within a jar in WEB-INF/lib
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