Sunday, January 2, 2022

[FIXED] HTTP 500 - INTERNAL SERVER ERROR. Servlet.init() for servlet spring-dispatcher threw exception

January 02, 2022 java, servlets, spring, spring-mvc

Issue

I'm a Spring MVC beginner and I'm following a tutorial about how to use it. On my main page which is "http://localhost:8080/FitnessTracker/" I don't have any problems, but when I try to access to, for example, "http://localhost:8080/FitnessTracker/addGoal.html", it says what i wrote on the title.

My web.xml is the next one:

<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

    <servlet>
        <servlet-name>fitTrackerServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>/WEB-INF/config/servlet-config.xml</param-value>
        </init-param>
    </servlet>
    
    <servlet-mapping>
        <servlet-name>fitTrackerServlet</servlet-name>
        <url-pattern>*.html</url-pattern>
    </servlet-mapping>
    
    <servlet-mapping>
        <servlet-name>fitTrackerServlet</servlet-name>
        <url-pattern>/pdfs/**</url-pattern>
    </servlet-mapping>
    
    <servlet-mapping>
        <servlet-name>fitTrackerServlet</servlet-name>
        <url-pattern>/images/**</url-pattern>
    </servlet-mapping>
    
    <servlet-mapping>
        <servlet-name>fitTrackerServlet</servlet-name>
        <url-pattern>*.json</url-pattern>
    </servlet-mapping>
    
    <display-name>Archetype Created Web Application</display-name>
</web-app>

My servlet-config.xml has this:

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xmlns:p="http://www.springframework.org/schema/p"
    xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd">

    <mvc:annotation-driven/>
    
    <mvc:resources location="assets" mapping="/assets/**"/>
    <mvc:resources location="pdfs" mapping="/pdfs/**"/>
    
    <context:component-scan base-package="com.pluralsight"/>
    
    <bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
        <property name="order" value="1" />
        <property name="contentNegotiationManager">
            <bean class="org.springframework.web.accept.ContentNegotiationManager">
                <constructor-arg>
                    <bean class="org.springframework.web.accept.PathExtensionContentNegotiationStrategy">
                        <constructor-arg>
                            <map>
                                <entry key="json" value="application/json" />
                                <entry key="xml" value="application/xml" />
                            </map>
                        </constructor-arg>
                    </bean>
                </constructor-arg>
            </bean>
        </property>
        
        <property name="defaultViews">
            <list>
                <bean class="org.springframework.web.servlet.view.json.MappingJacksonJsonView" />
                <bean class="org.springframework.web.servlet.view.xml.MarshallingView">
                    <constructor-arg>
                        <bean class="org.springframework.oxm.xstream.XStreamMarshaller">
                            <property name="autodetectAnnotations" value="true" />
                        </bean>
                    </constructor-arg>
                </bean>
            </list>
        </property>
    </bean>
    
    <mvc:interceptors>
        <bean class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor" p:paramName="language"/>
    </mvc:interceptors>
    
    <bean id="localeResolver" class="org.springframework.web.servlet.i18n.SessionLocaleResolver" p:defaultLocale="en"/>
    
    <bean id="messageSource" 
    class="org.springframework.context.support.ResourceBundleMessageSource" 
    p:basename="messages"></bean>
    
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" 
     p:prefix="/WEB-INF/jsp/" p:suffix=".jsp" p:order="2"/>
        
     <bean class="org.springframework.web.servlet.view.BeanNameViewResolver" p:order="0"/>

</beans>

This is my addGoal.jsp file

    pageEncoding="ISO-8859-1"%>

<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>


<!DOCTYPE html>
<html lang="en">
  
  <head>
    <meta charset="utf-8">
    <title>
    </title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <!-- Le styles -->
    <link href="assets/css/bootstrap.css" rel="stylesheet">
    <style>
      body { padding-top: 60px; /* 60px to make the container go all the way
      to the bottom of the topbar */ }
    </style>
    <link href="assets/css/bootstrap-responsive.css" rel="stylesheet">
    <!-- Le HTML5 shim, for IE6-8 support of HTML5 elements -->
    <!--[if lt IE 9]>
      <script src="http://html5shim.googlecode.com/svn/trunk/html5.js">
      </script>
    <![endif]-->
    <!-- Le fav and touch icons -->
    <link rel="shortcut icon" href="assets/ico/favicon.ico">
    <link rel="apple-touch-icon-precomposed" sizes="144x144" href="assets/ico/apple-touch-icon-144-precomposed.png">
    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="assets/ico/apple-touch-icon-114-precomposed.png">
    <link rel="apple-touch-icon-precomposed" sizes="72x72" href="assets/ico/apple-touch-icon-72-precomposed.png">
    <link rel="apple-touch-icon-precomposed" href="assets/ico/apple-touch-icon-57-precomposed.png">
    <style>
        .error {
            color: #ff0000;
        }
        
        .errorblock {
            color: #000;
            background-color: #ffEEEE;
            border: 3px solid #ff0000;
            padding: 8px;
            margin: 16px;
        }
    </style>
  </head>
  <body>
    <div class="navbar navbar-fixed-top navbar-inverse">
      <div class="navbar-inner">
        <div class="container">
          <a class="brand" href="#">
            Add Goal
          </a>
          <ul class="nav">
          </ul>
        </div>
      </div>
    </div>
    <div class="container">
      <div>
        <h1>
          Add Goal
        </h1>
        <p>
          Add your workout goal in minutes for the day.
          <br>
          &nbsp;
        </p>
      </div>
      
      <form:form commandName="goal">
        <form:errors path="*" cssClass="errorblock" element="div" />
            <label for="textinput1">
              Enter Minutes:
            </label>    
            <form:input path="minutes" cssErrorClass="error" />
            <form:errors path="minutes" cssClass="error" />
            <br/>
            <input type="submit" class="btn" value="Enter Goal Minutes"/>
      </form:form>
     
      <div class="control-group">
      </div>
    </div>

     <script src="jquery-1.8.3.js">
    </script>
    <script src="assets/js/bootstrap.js">
    </script>
  </body>
</html>

My GoalController.java


import javax.validation.Valid;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.SessionAttributes;

import com.pluralsight.model.Goal;

@Controller
@SessionAttributes("goal")
public class GoalController {

    @RequestMapping(value = "addGoal", method = RequestMethod.GET)
    public String addGoal(Model model) {
        Goal goal = new Goal();
        goal.setMinutes(10);
        model.addAttribute("goal", goal);
        
        return "addGoal";
    }
    
    @RequestMapping(value = "addGoal", method = RequestMethod.POST)
    public String updateGoal(@Valid @ModelAttribute("goal") Goal goal, BindingResult result) {
        
        System.out.println("result has errors: " + result.hasErrors());
        
        System.out.println("Goal set: " + goal.getMinutes());
        
        if(result.hasErrors()) {
            return "addGoal";
        }
        
        return "redirect:index.jsp";
    }
    
}

And I'm having this exception

    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:492)
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
    org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:1025)
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:452)
    org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1201)
    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:654)
    org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2532)
    org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2521)
    java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
    java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
    org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    java.base/java.lang.Thread.run(Thread.java:830)

What can I do to make this work? Thank you so much.

Solution

Add this in web.xml

<!-- Set up URL mapping for Spring MVC Dispatcher Servlet -->
    <servlet-mapping>
        <servlet-name>dispatcher</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

In web.xml why are you having more than one servlet mapping of single servlet My suggestion would be please remove all these servlet mapping and then just include which I have told you above

Try to access localhost:8080/FitnessTracker/addGoal as per your controller code

Answered By - Prateek Kumar

This Answer collected from stackoverflow and tested by JavaFixing community admins, is licensed under cc by-sa 2.5 , cc by-sa 3.0 and cc by-sa 4.0

Sunday, January 2, 2022

[FIXED] HTTP 500 - INTERNAL SERVER ERROR. Servlet.init() for servlet spring-dispatcher threw exception

Issue

Solution

Popular Posts

Labels