Error 500 Servletexception Null
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Javax.servlet.servletexception: Servlet Execution Threw An Exception
Users Badges Ask Question 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 why i'm getting this error of HTTP Status 500? [duplicate] how to solve http status 500 error in tomcat up vote 0 down vote favorite 1 This question already has an answer here: What is a stack trace, and how can I use it to debug my application errors? 7 answers I've created a simple JSP page and made a Servlet called UserController.java which is inside the package com.pro3.controller. In jsp page I have a form with get method. When I submit the form it fails with following exception: HTTP Status 500 - javax.servlet.ServletException: Error instantiating servlet class com.pro3.controller.UserController -------------------------------------------------------------------------------- type Exception report message javax.servlet.ServletException: Error instantiating servlet class com.pro3.controller.UserController description The server encountered an internal error that prevented it from fulfilling this request. exception org.apache.jasper.JasperException: javax.servlet.ServletException: Error instantiating servlet class com.pro3.controller.UserController org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:502) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:412) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260) javax.servlet.http.HttpServlet.service(HttpServlet.java:723) root cause javax.servlet.ServletException: Error instantiating servlet class com.pro3.controller.UserController org.apache.jasper.runtime.PageContextImpl.doForward(PageContextImpl.java:709) org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:680) org.apache.jsp.index_jsp._jspService(index_jsp.java:62) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) javax.servlet.http.HttpServlet.service(HttpServlet.java:723) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:388) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260) ja
here for a quick overview of the the server encountered an internal error that prevented it from fulfilling this request. site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation http://stackoverflow.com/questions/21479861/why-im-getting-this-error-of-http-status-500 Tags Users Badges Ask Question 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 how to fix “HTTP Status 500- Servlet exception threw http://stackoverflow.com/questions/21346489/how-to-fix-http-status-500-servlet-exception-threw-an-exception an exception” up vote -1 down vote favorite i got this erore and i don't know what's wrong i just want to check the username & password and then enter a page that shows it login or not package cse; import java.io.IOException; import java.security.NoSuchAlgorithmException; import java.util.Date; import java.util.Random; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; @SuppressWarnings("serial") @WebServlet(urlPatterns = {"/LogIn"}) public class LogIn extends HttpServlet { @Override public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException { String username = request.getParameter("username"); String password = request.getParameter("password"); User signedInUser = User.login(username, password); if(!signedInUser.equals(null)){ HttpSession s = request.getSession(); s.setAttribute("signedInKey", (new Date()).getTime() + (new Random()).nextInt(999999999)); request.setAttribute("user", signedInUser); String url = "http://localhost:8080/java_project/test.jsp"; response.sendRedirect(url); } String url = "http://localhost:8080/java_project/notLogIn.jsp"; response.sendRedirect(url); } } and this is the error HTTP Status 500 - Servlet execution threw an exception -----------------------------------
Rule http://www-01.ibm.com/support/docview.wss?uid=swg21441414 Team Server/Decision Center console JSF error NPE; WODM Technote (troubleshooting) Problem(Abstract) An IllegalStateException or NullPointerException is thrown in the WebSphere Application Server (WAS) log while accessing the Rule Team Server (RTS)/Decision Center (DC) console in a error 500 browser. Symptom When browsing to the RTS/DC console at http://