Check Servlets Mappings. Error Code 404
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404 Error Servlet Eclipse
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How To Solve 404 Error In Servlet
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 vaadin `communication error: check servlets mapping` up vote 0 down vote favorite how to remove 404 error in servlet I wrote a simple application using vaadin. @Title("PMC") @Component("pmcVaadin") @Scope("prototype") public class PmcUi extends UI { @Autowired private ContentLayout contentLayout; @Autowired private TabContent tabs; @Override protected void init(VaadinRequest request) { VerticalLayout mainLayout = new VerticalLayout(); // mainLayout.addComponent(contentLayout.getContent()); mainLayout.addComponent(tabs.createTab("Projects", "Developers")); mainLayout.setSizeFull(); setContent(mainLayout); } } Tabs - my TabContent component, extended from TabSheet. But when I click on the tab I've got an error: Communication problem Take note of any unsaved data, and click here or press ESC to continue. *UIDL could not be read from server. Check servlets mappings. Error code: 404* My web.xml looks like this here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss http status 404 error in eclipse the workings and policies of this site About Us Learn more about Stack Overflow the getting 404 error while running servlet company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss http://stackoverflow.com/questions/27184942/vaadin-communication-error-check-servlets-mapping 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 Tomcat servlet mapping error 404 [duplicate] up vote 2 down vote favorite 1 This question already has an answer here: http://stackoverflow.com/questions/15545950/tomcat-servlet-mapping-error-404 Servlet returns “HTTP Status 404 The requested resource (/servlet) is not available” 2 answers Sorry if this is a common question, but I'm gonna crazy. I'm starting with JSP developing, using Tomcat running on Ubuntu Server. I'm trying to run my first "Hello World" servlet, without success. I have the following stuff on the server: the webapps directory is: /var/lib/tomcat6/webapps/ in webapps I have created the context-root hello/ directory hello/ contains index.html and WEB-INF/ WEB-INF contains web.xml and classes/HelloServlet.class This is index.html: 404 Error In Java Application
here for a quick overview of the site Help Center Detailed answers to any questions you http://stackoverflow.com/questions/29111842/error-404-with-jsp-and-servlet might have Meta Discuss the workings and policies of this http://www.journaldev.com/1973/servlet-exception-and-error-handling-example-tutorial 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 Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community 404 error of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Error 404 with JSP and Servlet [duplicate] up vote 1 down vote favorite This question already has an answer here: Servlet returns “HTTP Status 404 The requested resource (/servlet) is not available” 2 answers is 404 error in the form tag in my JSP
QuestionsJava Interview QuestionsJDBC Interview QuestionsServlet Interview QuestionsJSP Interview QuestionsStruts2 Interview QuestionsSpring Interview QuestionsHibernate Interview QuestionsJSF Interview QuestionsResourcesStoreHome » Java » Java EE » Servlet Exception and Error Handling Example TutorialServlet Exception and Error Handling Example TutorialJuly 14, 2016 by Pankaj 13 Comments Today we will look into Servlet Exception and Error Handling. Sometime back I wrote a post about Exception Handling in Java but when it comes to web application, we need more than normal exception handling in java.Servlet ExceptionIf you notice, doGet() and doPost() methods throw javax.servlet.ServletException and IOException, let's see what happens when we throw these exception from our application. I will write a simple servlet that will throw the ServletException. package com.journaldev.servlet.exception; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; @WebServlet("/MyExceptionServlet") public class MyExceptionServlet extends HttpServlet { private static final long serialVersionUID = 1L; protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { throw new ServletException("GET method is not supported."); } } Now when we invoke this servlet through browser with GET method, we get response like below image.Since browser understand only HTML, when our application throw exception, servlet container processes the exception and generate a HTML response. This logic is specific to servlet container.