ClassCastException: DispatcherServlet cannot be cast to Servlet

ClassCastException: DispatcherServlet cannot be cast to Servlet - java

I have created a new Spring MVC project using maven-eclipse and the following error is thrown:
(I tried some solutions from the stackoverflow which is not working in my case. Some problem with the pom.xml which I could not find. I added provided scope for the servlet-api and tried which was not working either.)
SEVERE: Servlet /Remindem threw load() exception
java.lang.ClassCastException: org.springframework.web.servlet.DispatcherServlet
cannot be cast to javax.servlet.Servlet
My pom.xml is as follows:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.org</groupId>
<artifactId>Remindem</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>Remindem</name>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.0.1</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.1</version>
</dependency>
<dependency>
<groupId>org.apache.maven</groupId>
<artifactId>maven-plugin-api</artifactId>
<version>2.0</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>3.6.8.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>4.0.0.Beta2</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.6</version>
</dependency>
<dependency>
<groupId>javassist</groupId>
<artifactId>javassist</artifactId>
<version>3.12.1.GA</version>
</dependency>
<dependency>
<groupId>javax.mail</groupId>
<artifactId>mail</artifactId>
<version>1.4</version>
</dependency>
<!-- Spring framework -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring</artifactId>
<version>2.5.6</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>2.5.6</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>3.2.3.RELEASE</version>
<scope>compile</scope>
</dependency>
<!-- Spring MVC framework -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>2.5.6</version>
<scope>compile</scope>
</dependency>
<!-- JSTL -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.1.2</version>
</dependency>
<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency>
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-api</artifactId>
<version>7.0.19</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.0</version>
<configuration>
<url>http://localhost:8080/Remindem</url>
</configuration>
</plugin>
</plugins>
</build>
My web.xml is as follows:
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<display-name>Remindem</display-name>
<session-config>
<session-timeout>
30
</session-timeout>
</session-config>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>svn</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>
/WEB-INF/SpringAppServlet.xml
</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>svn</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
</web-app>

Change
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.0.1</version>
<scope>compile</scope>
</dependency>
to
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.0.1</version>
<scope>provided</scope>
</dependency>
provided has this description:
This is much like compile, but indicates you expect the JDK or a
container to provide the dependency at runtime. For example, when
building a web application for the Java Enterprise Edition, you would
set the dependency on the Servlet API and related Java EE APIs to
scope provided because the web container provides those classes. This
scope is only available on the compilation and test classpath, and is
not transitive.
from the maven docs. You're basically telling Maven to provided the jar for compilation, but, at runtime, use some other, the servlet container's, jar.

In your case, ClassCastException seems to be because of classes being loaded by different classloaders. Say, you have the servlet-api.jar included by mistake in your WEB-INF/lib and you had set PARENT_LAST true for your webapp class loader. If you are running on an application server like WAS, this would mean you are loading interface with one class loader (some class loader at the top) and implementation (servlet-api jar just an e.g.) with another class loader at the bottom.

Keep scope as 'provided' and try keeping that jar in tomcat/lib folders. This is because of each class loader of respective war tries to load its own Servlet-api classes separately,compared to application class loader which loads the Servlet-api classes at container level.
So if u can make the jar moved to CATALINA_HOME/lib.you have required set of classes loaded by application class loader only and same version will be referred across by all wars.
scope 'provided' conveys to class loader at war level that the classes required for this is already loaded by application class loader and insists class loader at its war level may not required to create separate instances or version for it that cause class cast exception

Which application server you are using? I think Servlet jars files should be provide by your application srver.

Related

Springboot Whitelabel Error Page with JSF (AWS)

I have an old (inherited) project that I need to deploy on AWS but I get some problems related to the template folder.
This project has an index.xhtml on "src\main\webapp" instead of "src\main\resources\templates", I think it is beacuse it uses jsf but I'm new on Springboot and jsf pages.
In the documentation I've got it says that in order to open the web you need to visit http://localhost:5000/index.jsf so to solve it I made a class with
#Controller
public class IndexController {
#RequestMapping(value = {"", "/"})
public String index() {
return "redirect:/index.jsf";
}
}
In local works but the problem I get is that when I deploy it on AWS with Elastic Beanstalk, I create a new Java application on it to upload the jar file made with maven.
But when I enter to the application I always get this message:
Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.
Thu Jun 18 14:52:25 UTC 2020
There was an unexpected error (type=Not Found, status=404).
/index.jsp
I try to:
Search where it's configured the custom folder but I didn't find it.
Move the index.xhtml file to templates but doesn't work.
Add to application.properties file spring.thymeleaf.prefix=classpath:/templates/ to set the default folder.
Instead of Java application I made a Tomcat application on Elastic Beanstalk and upload a war file made with maven but I get a tomcat 404.
The project has a page on swagger-ui to test de API Rest petitions, I don't know if it might cause some problems.
POM.XML
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>es.xxxxxxx</groupId>
<artifactId>xxxxxxxxxx</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>xxxxxxxxxx</name>
<description>xxxxxxxxxxxxxxxxxxxxxxx</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.3.6.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<java.version>1.7</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<scope>compile</scope>
</dependency>
<!-- JSF -->
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-core</artifactId>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>com.sun.faces</groupId>
<artifactId>jsf-api</artifactId>
<version>2.2.8-02</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>com.sun.faces</groupId>
<artifactId>jsf-impl</artifactId>
<version>2.2.8-02</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
</dependency>
<dependency>
<groupId>org.primefaces</groupId>
<artifactId>primefaces</artifactId>
<version>5.3</version>
</dependency>
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-logging-juli</artifactId>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-aop</artifactId>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger2</artifactId>
<version>2.0.3</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.datatype</groupId>
<artifactId>jackson-datatype-joda</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.datatype</groupId>
<artifactId>jackson-datatype-hppc</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.datatype</groupId>
<artifactId>jackson-datatype-json-org</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>org.primefaces.themes</groupId>
<artifactId>all-themes</artifactId>
<version>1.0.10</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>prime-repo</id>
<name>PrimeFaces Maven Repository</name>
<url>http://repository.primefaces.org</url>
<layout>default</layout>
</repository>
</repositories>
</project>
application.properties
server.port = 5000
More Info:
I noticed that the WEB-INF folder was missing so I created it (also clasess and lib folders) and I added these files.
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" version="3.1">
<servlet>
<servlet-name>Faces Servlet</servlet-name>
<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>*.jsf</url-pattern>
</servlet-mapping>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<listener>
<listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
</listener>
</web-app>
faces-config.xml
<?xml version="1.0" encoding="UTF-8"?>
<faces-config xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/web-facesconfig_2_2.xsd"
version="2.2">
<application>
<el-resolver>org.springframework.web.jsf.el.SpringBeanFacesELResolver</el-resolver>
</application>
</faces-config>
Besides I added this line on pom.xml
<outputDirectory>src/main/webapp/WEB-INF/classes</outputDirectory>
But the problem continues.

Tomcat 7 java.lang.NoClassDefFoundError: javax/el/ELManager [duplicate]

This question already has answers here:
Why am I getting a NoClassDefFoundError in Java?
(31 answers)
Closed 4 years ago.
I want to deploy my application to a tomcat in version 7 and I get the following Exception java.lang.NoClassDefFoundError: javax/el/ELManager
But if I try to deploy this application to tomcat version 8 it works fine.
Do you have any ideas how to fix this?
Why do i switch from tomcat 8 to 7? In the test environment was tomcat 8 in the repo and on the server it is tomcat7.
pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>certplatform</groupId>
<artifactId>certplatform</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<build>
<sourceDirectory>src</sourceDirectory>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.7.0</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>3.0.0</version>
<configuration>
<warSourceDirectory>WebContent</warSourceDirectory>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-
core -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>5.0.4.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-
context -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.0.4.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-
context-support -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>5.0.4.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-
webmvc -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.0.4.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-web
-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>5.0.4.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.servlet/jstl -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!--https://mvnrepository.com/artifact/javax.servlet.jsp.jstl/javax.servlet.jsp.jstl-api -->
<dependency>
<groupId>javax.servlet.jsp.jstl</groupId>
<artifactId>javax.servlet.jsp.jstl-api</artifactId>
<version>1.2.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.mail/mail -->
<dependency>
<groupId>javax.mail</groupId>
<artifactId>mail</artifactId>
<version>1.5.0-b01</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-validator -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>6.0.8.Final</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-core -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.2.15.Final</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-entitymanager -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>5.2.15.Final</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.postgresql/postgresql -->
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>42.2.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.bouncycastle/bcprov-jdk15on -->
<dependency>
<groupId>org.bouncycastle</groupId>
<artifactId>bcprov-jdk15on</artifactId>
<version>1.59</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.bouncycastle/bcpkix-jdk15on -->
<dependency>
<groupId>org.bouncycastle</groupId>
<artifactId>bcpkix-jdk15on</artifactId>
<version>1.59</version>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.el/javax.el-api -->
<dependency>
<groupId>javax.el</groupId>
<artifactId>javax.el-api</artifactId>
<version>3.0.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.el/el-api -->
<dependency>
<groupId>javax.el</groupId>
<artifactId>el-api</artifactId>
<version>2.2</version>
</dependency>
web.xml
<?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>spring-mvc-demo</display-name>
<!-- Spring MVC Configs -->
<!-- Step 1: Configure Spring MVC Dispatcher Servlet -->
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring-mvc-servlet.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<!-- Step 2: Set up URL mapping for Spring MVC Dispatcher Servlet -->
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>

The issue is caused by the fact that this class javax/el/ELManager is introduced in el-api version 3.0.
Tomcat 7 is coming with pre-bundled el-api 2.2 (which is missing the class) and it's picking that at runtime, instead of your el-api jar.
Tomcat 8 has the el-api 3.0 and hence the javax/el/ELManager class is present.
It's best if you can sync your dev/test/prod environments as close as possible.
It makes much more sense to develop against Tomcat 8 in dev, when your test environment has Tomcat 8. As you found out Tomcat 7 and 8 servers comes with different set of libraries, so your code can behave differently against those different set of libraries.

If you want to run your webapp on Tomcat 7 in production, then you should be using Tomcat 7 in your test environment.
What has happened is that you have accidentally introduced a dependency on the EL 3.0 APIs ... and included it in your POM file. It is working find on Tomcat 8. But on Tomcat 7, the platform supports EL 2.1. So when your app attempts to load the classfile for javax.el.ELManager ... it fails.
Solutions:
Upgrade your production platform to Tomcat 8
Downgrade your dev and test platforms to Tomcat 7, and eliminate any dependencies on the newer APIs from your codebase .
The Apache Tomcat Versions page lists the various spec versions for each of the major versions of Tomcat.
Is there no possibility to solve this issue?
If you were prepared to "butcher" the Tomcat 7 server, you might be able to replace the EL implementation with a newer one. But I would not try that, because 1) it may not work at all, and 2) the result is liable to be difficult to maintain. And you are liable to give your operations, quality assurance and/or security teams an apoplexy!
Is there no possibility to solve this issue with changes in the application?
AFAIK, there is no possibility.
I thought you could try replacing the EL dependency with this:
<dependency>
<groupId>javax.el</groupId>
<artifactId>javax.el-api</artifactId>
<version>3.0.0</version>
</dependency>
But it doesn't work. According to a comment from Alex:
"Adding the JAR to the application POM does not solve anything. Here its the message printed out by Tomcat bootstrap: "validateJarFile(C:\Software\apache-tomcat-7.0.99\webapps\leonardo-flows-services\WEB-INF\lib\javax.el-api-3.0.0.jar) - jar not loaded. See Servlet Spec 3.0, section 10.7.2. Offending class: javax/el/Expression.class". It conflicts with its lib jar."

Resource configuration class could not be loaded when trying to open index.html in eclipse

I am trying to open index.html from eclipse. But I got this error:
javax.servlet.ServletException: Resource configuration class
com.sensorhound.things.rest.ThingsApplication could not be loaded.
I am using java EE framework.
Previously, I am writing my front-end code using a Node.js fake server. Then I create a maven project in eclipse to write my back-end code. And I didn't move my front-end code to this project until I finish writing up the back-end code.
What I did to test my front-end code before was start up my wildfly server and Cassandra database, then I will do a mvn wildfly:deploy under my back-end project directory. Then I will go to the front-end code folder and open the index.html in browser. It works fine.
Now I need to wrap up my project so I copy my front-end code to
src/main/webapps
directory, and update my project.
But when I try to open the index.html from eclipse. It give me this error.
For more reference, here is my web.xml:
<?xml version="1.0" encoding="UTF-8"?>
<web-app 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_3_0.xsd"
version="3.0">
<display-name>servlet 3.0 Web Application</display-name>
<context-param>
<param-name>resteasy.providers</param-name>
<param-value>
com.sensorhound.aigateway.ws.filters.CORSFilter
</param-value>
</context-param>
<servlet>
<servlet-name>ServletContainer</servlet-name>
<servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
<init-param>
<param-name>javax.ws.rs.Application</param-name>
<param-value>com.sensorhound.things.rest.ThingsApplication</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>ServletContainer</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
</web-app>
Here is my pom.xml:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.sensorhound</groupId>
<artifactId>aigateway</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>AI Gateway Maven Webapp</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<jetty.version>9.3.12.v20160915</jetty.version>
<jersey.version>2.23.2</jersey.version>
<ogm.version>5.0.4.Final</ogm.version>
<hibernate.version>5.0.4.Final</hibernate.version>
</properties>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.hibernate.ogm</groupId>
<artifactId>hibernate-ogm-bom</artifactId>
<version>5.0.4.Final</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<!-- hibernate -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-search-orm</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-search-infinispan</artifactId>
<version>5.1.1.Final</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.hibernate.ogm</groupId>
<artifactId>hibernate-ogm-cassandra</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>dom4j</groupId>
<artifactId>dom4j</artifactId>
<version>1.6.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.jboss.logging</groupId>
<artifactId>jboss-logging</artifactId>
<version>3.3.0.Final</version>
</dependency>
<dependency>
<groupId>org.jboss</groupId>
<artifactId>jandex</artifactId>
<version>2.0.3.Final</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>2.7.3</version>
</dependency>
<!-- hibernate ogm -->
<!-- Hibernate OGM Infinispan module; pulls in the OGM core module -->
<dependency>
<groupId>org.hibernate.ogm</groupId>
<artifactId>hibernate-ogm-infinispan</artifactId>
<scope>provided</scope>
</dependency>
<!-- standard APIs dependencies - provided in a Java EE container -->
<dependency>
<groupId>org.hibernate.javax.persistence</groupId>
<artifactId>hibernate-jpa-2.1-api</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.jboss.spec.javax.transaction</groupId>
<artifactId>jboss-transaction-api_1.2_spec</artifactId>
</dependency>
<!-- Add the Narayana Transactions Manager
an implementation would be provided in a Java EE container,
but this works nicely in Java SE as well -->
<dependency>
<groupId>org.jboss.narayana.jta</groupId>
<artifactId>narayana-jta</artifactId>
</dependency>
<dependency>
<groupId>org.jboss</groupId>
<artifactId>jboss-transaction-spi</artifactId>
<version>7.5.0.Final</version>
</dependency>
<dependency>
<groupId>jboss</groupId>
<artifactId>jbossjta</artifactId>
<version>4.2.2.GA</version>
</dependency>
<dependency>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-server</artifactId>
<version>${jetty.version}</version>
</dependency>
<!-- dependency> <groupId>org.eclipse.jetty</groupId> <artifactId>jetty-servlet</artifactId>
<version>${jetty.version}</version> </dependency -->
<dependency>
<groupId>org.glassfish.jersey.core</groupId>
<artifactId>jersey-server</artifactId>
<version>${jersey.version}</version>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.containers</groupId>
<artifactId>jersey-container-servlet-core</artifactId>
<version>${jersey.version}</version>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.containers</groupId>
<artifactId>jersey-container-jetty-http</artifactId>
<version>${jersey.version}</version>
</dependency>
<dependency>
<groupId>org.fusesource.leveldbjni</groupId>
<artifactId>leveldbjni-all</artifactId>
<version>1.8</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.ws.rs/javax.ws.rs-api -->
<dependency>
<groupId>javax.ws.rs</groupId>
<artifactId>javax.ws.rs-api</artifactId>
<version>2.0</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.0.1</version>
</dependency>
<dependency>
<groupId>org.hibernate.javax.persistence</groupId>
<artifactId>hibernate-jpa-2.0-api</artifactId>
<version>1.0.1.Final</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.googlecode.json-simple</groupId>
<artifactId>json-simple</artifactId>
<version>1.1.1</version>
</dependency>
<dependency>
<groupId>javax.ejb</groupId>
<artifactId>ejb-api</artifactId>
<version>3.0</version>
</dependency>
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-api</artifactId>
<version>7.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>19.0</version>
</dependency>
</dependencies>
<build>
<finalName>aigateway</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<groupId>org.wildfly.plugins</groupId>
<artifactId>wildfly-maven-plugin</artifactId>
<version>1.1.0.Final</version>
<configuration>
<force>true</force>
<!-- <hostname>${wildfly-hostname}</hostname> -->
<!-- <username>${wildfly-user}</username> -->
<!-- <password>${wildfly-password}</password> -->
</configuration>
</plugin>
</plugins>
</build>
</project>
If you need more information, I am willing to share.
Thanks!

I solve this by remove servlet related tags in web.xml. Those are the code my co-workers added when using jetty server.

class org.springframework.web.context.ContextLoaderListener not found

When I am creating a new Spring MVC project using eclipse and maven, it throws the following error when I do a run as maven build(goal is tomcat:run). I did the build after clean and install.
SEVERE: Error configuring application listener of class org.springframework.web.context.ContextLoaderListener
java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener
The other solutions for this problem are to add the maven dependencies in deployment assembly from the project properties.
But, the deployment assembly option is not present when I right click the properties.
I also tried adding spring.jar manually.
The class org.springframework.web.context.ContextLoaderListener is present in the maven dependency and still the error is thrown.
pom.xml
My pom.xml is as follows:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.org</groupId>
<artifactId>Remindem</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>Remindem</name>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.0.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.maven</groupId>
<artifactId>maven-plugin-api</artifactId>
<version>2.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>3.6.8.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>4.0.0.Beta2</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.6</version>
</dependency>
<dependency>
<groupId>javassist</groupId>
<artifactId>javassist</artifactId>
<version>3.12.1.GA</version>
</dependency>
<dependency>
<groupId>javax.mail</groupId>
<artifactId>mail</artifactId>
<version>1.4</version>
</dependency>
<!-- Spring framework -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring</artifactId>
<version>2.5.6</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>3.0.5.RELEASE</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>3.2.3.RELEASE</version>
<scope>provided</scope>
</dependency>
<!-- Spring MVC framework -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>2.5.6</version>
<scope>provided</scope>
</dependency>
<!-- JSTL -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.1.2</version>
</dependency>
<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency>
<!-- for compile only, your container should have this -->
<!-- <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId>
<version>2.5</version> <scope>provided</scope> </dependency> -->
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-api</artifactId>
<version>7.0.19</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.0</version>
<configuration>
<url>http://localhost:8080/Remindem</url>
</configuration>
</plugin>
</plugins>
</build>
</project>
web.xml
My web.xml is as follow:
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<display-name>Remindem</display-name>
<session-config>
<session-timeout>
30
</session-timeout>
</session-config>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>svn</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>
/WEB-INF/SpringAppServlet.xml
</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
/WEB-INF/SpringAppServlet.xml
</param-value>
</context-param>
<servlet-mapping>
<servlet-name>svn</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
</web-app>

This is because you mark your Spring dependencies with <scope>provided</scope> on your maven pom.xml and you did not include the actual jars on the classpath when running the program. There are two possible solutions:
Change the dependency scope into compile
Include the spring jars with matching version to your classpath when running the application

ServletDispatcher cannot be cast to Javax.servlet.Servlet exception in my spring project

While starting tomcat server I am getting an exception
SEVERE: Servlet /MavenWeb threw load() exception
java.lang.ClassCastException: org.springframework.web.servlet.DispatcherServlet
cannot be cast to javax.servlet.Servlet
I am using spring3 but there is jar spring2-5-6 in my lib folder, I removed it from pom.xml but still appears in lib folder - though I am not sure if that is an issue. I am using Eclipse IDE. Thanks!!
<dependencies>
<dependency>
<groupId>org.hibernate.javax.persistence</groupId>
<artifactId>hibernate-jpa-2.1-api</artifactId>
<version>1.0.0.Draft-6</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-annotations</artifactId>
<version>3.5.6-Final</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>3.1.2.RELEASE</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>3.1.2.RELEASE</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>3.1.2.RELEASE</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>3.1.2.RELEASE</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>3.1.2.RELEASE</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1-b01</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webflow</artifactId>
<version>1.0.6</version>
<scope>compile</scope>
</dependency>
</dependencies>

You shouldn't be using multiple versions of Spring JARs in one project, but this is not the issue.
The problem is most likely caused by servlet API classes loaded by two different class-loaders. Probably you have servlet*.jar or some other container-specific JARs in your WAR. Remove them by setting their <scope> to provided in pom.xml.

In my case it wasn't a problem with the libraries. I was changing a Standard Servlet to be implemented with Spring, so I followed these instructions, that I paraphrase here just in case the page goes down later:
Implement org.springframework.web.HttpRequestHandler instead of extending javax.Servlet
public class MyServlet implements HttpRequestHandler {
Created the bean in the applicationContext.xml (I did it in the dispatcher-servlet.xml)
<bean id="MyServlet" class="com.package.to.MyServlet"/>
Specify the servlet in the Web.xml, changing the old class (com.package.to.MyServlet) to Spring HttpRequestHandlerServlet.
<servlet>
<servlet-name>MyServlet</servlet-name>
<servlet-class>org.springframework.web.context.support.HttpRequestHandlerServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>MyServlet</servlet-name>
<url-pattern>/MyServlet</url-pattern>
</servlet-mapping>
I had to do an additional step to avoid a FileNotFoundException about applicationContext.xml doing the following in the web.xml
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/dispatcher-servlet.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

We Keep Coding

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