Tomcat 404 Error: the Origin Server Did Not Find a Current Representation for the Target Resource or Is Not Willing to Disclose That One Exists

Tomcat 404 error: The origin server did not find a current representation for the target resource or is not willing to disclose that one exists

Problem solved, I've not added the index.html. Which is point out in the web.xml

Note: a project may have more than one web.xml file.

if there are another web.xml in

src/main/webapp/WEB-INF

Then you might need to add another index (this time index.jsp) to

src/main/webapp/WEB-INF/pages/

404: The origin server did not find a current representation for the target resource or is not willing to disclose that one exists with Tomcat

This is a common problem with application servers across the full spectrum. If you are encountering 404s or other issues, the way to debug the issue is to incrementally step backwards and forwards. The first thing you should do is look at your server logs to make sure the server has started right. If it has, you should try creating a index.html file and testing that. And so on and so on. On a failed test, you step back to see what's wrong in the previous steps. On a successful test, you step forward to see if the next thing works

The origin server did not find a current representation for the target resource or is not willing to disclose that one exists

the problem is in url pattern of servlet-mapping.

 <url-pattern>/DispatcherServlet</url-pattern>

let's say our controller is

@Controller
public class HomeController {
    @RequestMapping("/home")
    public String home(){
        return "home";
    }
}

when we hit some URL on our browser. the dispatcher servlet will try to map this url.

the url pattern of our serlvet currently is /Dispatcher which means resources are served from {contextpath}/Dispatcher

but when we request http://localhost:8080/home we are actually asking resources from / which is not available.
so either we need to say dispatcher servlet to serve from / by doing

<url-pattern>/</url-pattern>

our make it serve from /Dispatcher by doing /Dispatcher/*

E.g

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xmlns="http://xmlns.jcp.org/xml/ns/javaee" 
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee 
http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" 
version="3.1">
  <display-name>springsecuritydemo</display-name>

  <servlet>
    <description></description>
    <display-name>offers</display-name>
    <servlet-name>offers</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>offers</servlet-name>
    <url-pattern>/Dispatcher/*</url-pattern>
  </servlet-mapping>

</web-app>

and request it with http://localhost:8080/Dispatcher/home
or put just / to request like

http://localhost:8080/home

Spring Application gets 404 error on TomCat

I changed the JRE_HOME (was running java 8) to the same path of JAVA_HOME which is with Java 11, and it worked. Tomcat was on Java 8 and my project was running Java 11.

Log:
Using JRE_HOME: "C:\Program Files\Java\jre1.8.0_333"

My POM.xml:
<java.version>11</java.version>

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