'java.lang.ClassCastException: org.glassfish.jersey.jackson.internal.JacksonAutoDiscoverable cannot be cast to spi.AutoDiscoverable

I am new to implementing REST API services. I have tried the simple resources to implement. unfortunately I stuck with this exception. I have googled and tried many options but no luck. I am unsure what am doing wrong. Please help me.

Created a Dynamic Web project "JersyJson"
Created a resouce named - JSONService.java (source is from googling)
Created a Java Bean class - Track.java (source is from googling)
Converted the project into Maven project
Created a Application file - JersyJson.java file for Application Annotation
using the latest Jersy Jars (version: 2.22.2)
Imported & configured jersey-media-json-jackson and jersey-media-moxy jars (2.22.2) in pom.xml

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>JersyJson</groupId>
  <artifactId>JersyJson</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>

   <dependencies>
   <dependency>
      <groupId>javax.ws.rs</groupId>
          <artifactId>javax.ws.rs-api</artifactId>
          <version>2.0.1</version>
        </dependency> 
    <dependency> 
    <groupId>org.glassfish.jersey.containers</groupId>
    <!-- if your container implements Servlet API older than 3.0, use "jersey-container-servlet-core"  -->
    <artifactId>jersey-container-servlet</artifactId>
    <version>2.22.2</version>
</dependency>
<dependency>
    <groupId>org.glassfish.jersey.media</groupId>
    <artifactId>jersey-media-json-jackson</artifactId>
    <version>2.22.2</version>
</dependency>
<dependency>
    <groupId>org.glassfish.jersey.media</groupId>
    <artifactId>jersey-media-moxy</artifactId>
    <version>2.22.2</version>
</dependency>

  </dependencies>

  <build>
    <sourceDirectory>src</sourceDirectory>
    <plugins>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.3</version>
        <configuration>
          <source>1.8</source>
          <target>1.8</target>
        </configuration>
      </plugin>
      <plugin>
        <artifactId>maven-war-plugin</artifactId>
        <version>2.6</version>
        <configuration>
          <warSourceDirectory>WebContent</warSourceDirectory>
          <failOnMissingWebXml>false</failOnMissingWebXml>
        </configuration>
      </plugin>
    </plugins>
  </build>
</project>

Web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
  <display-name>JersyJson</display-name>


    <servlet>
    <servlet-name>javax.ws.rs.core.Application</servlet-name>
</servlet>

    <servlet-mapping>
    <servlet-name>javax.ws.rs.core.Application</servlet-name>
    <url-pattern>/json/metallica/*</url-pattern>
</servlet-mapping>


</web-app>

JersyJson.java (ApplicationAnnotation file)

@ApplicationPath("json")
public class JersyJson extends ResourceConfig {
    public JersyJson() {
        packages("com.sai.jersyjson");
    }
}

JSONservice.java:

package com.sai.jersyjson;

import javax.ws.rs.Consumes;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;



@Path("/json/metallica")
public class JSONService {

    @GET
    @Path("/get")
    @Produces(MediaType.APPLICATION_JSON)
    public Track getTrackInJSON() {

        Track track = new Track();
        track.setTitle("Enter Sandman");
        track.setSinger("Metallica");

        return track;

    }

    @POST
    @Path("/post")
    @Consumes(MediaType.APPLICATION_JSON)
    public Response createTrackInJSON(Track track) {

        String result = "Track saved : " + track;
        return Response.status(201).entity(result).build();

    }

}

Track.java (simple bean class)

package com.sai.jersyjson;

public class Track {

    String title;
    String singer;

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getSinger() {
        return singer;
    }

    public void setSinger(String singer) {
        this.singer = singer;
    }

    @Override
    public String toString() {
        return "Track [title=" + title + ", singer=" + singer + "]";
    }

}

After I run this project in Eclispe using Tomcat webserver, I get the following error with 404-Error Status

SEVERE: StandardWrapper.Throwable java.lang.ClassCastException: org.glassfish.jersey.jackson.internal.JacksonAutoDiscoverable cannot be cast to org.glassfish.jersey.internal.spi.AutoDiscoverable at org.glassfish.jersey.model.internal.CommonConfig$2.compare(CommonConfig.java:594) at java.util.TreeMap.put(Unknown Source) at java.util.TreeSet.add(Unknown Source) at java.util.AbstractCollection.addAll(Unknown Source) at java.util.TreeSet.addAll(Unknown Source) at org.glassfish.jersey.model.internal.CommonConfig.configureAutoDiscoverableProviders(CommonConfig.java:616) at org.glassfish.jersey.server.ResourceConfig.configureAutoDiscoverableProviders(ResourceConfig.java:811) at org.glassfish.jersey.server.ApplicationHandler.initialize(ApplicationHandler.java:447) at org.glassfish.jersey.server.ApplicationHandler.access$500(ApplicationHandler.java:184) at org.glassfish.jersey.server.ApplicationHandler$3.call(ApplicationHandler.java:350) at org.glassfish.jersey.server.ApplicationHandler$3.call(ApplicationHandler.java:347) at org.glassfish.jersey.internal.Errors.process(Errors.java:315) at org.glassfish.jersey.internal.Errors.process(Errors.java:297) at org.glassfish.jersey.internal.Errors.processWithException(Errors.java:255) at org.glassfish.jersey.server.ApplicationHandler.(ApplicationHandler.java:347) at org.glassfish.jersey.servlet.WebComponent.(WebComponent.java:392) at org.glassfish.jersey.servlet.ServletContainer.init(ServletContainer.java:177) at org.glassfish.jersey.servlet.ServletContainer.init(ServletContainer.java:369) at javax.servlet.GenericServlet.init(GenericServlet.java:158) at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1238) at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1041) at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4996) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5285) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1408) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1398) at java.util.concurrent.FutureTask.run(Unknown Source) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source)

jax-rs

Solution 1:^[1]

I had the exact same problem in Weblogic. It seems to be that the JacksonAutoDiscoverable and AutoDiscoverable came from different class loaders and therefore different versions. AutoDiscoverable exists in jersey-common and JacksonAutoDiscoverable exists in jersey-media-json-jackson.

I got around this by letting Weblogic have all the discoverable classes and instead specifying 'com.fasterxml.jackson.*' as prefer-application-packages/resources to have my own version of jackson.

Solution 2:^[2]

I had this same problem, but I got a fix. There's an issue with conflicting dependencies. You've included the jersey-media-json-jackson dependency, but the Tomcat web container already provides those classes.

Just add the scope tag to your dependency:

<dependency>
    <groupId>org.glassfish.jersey.media</groupId>
    <artifactId>jersey-media-json-jackson</artifactId>
    <version>2.27</version>
    <scope>provided</scope>
</dependency>

Refer to the link for more information: https://maven.apache.org/guides/introduction/introduction-to-dependency-mechanism.html#

Solution 3:^[3]

In my case I worked with Glassfish and I had the Glassfish descriptor (glassfish-web.xml) in the project as follow:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE glassfish-web-app PUBLIC "-//GlassFish.org//DTD GlassFish Application Server 3.1 Servlet 3.0//EN" "http://glassfish.org/dtds/glassfish-web-app_3_0-1.dtd">
<glassfish-web-app error-url="">
  <class-loader delegate="false"/>
  <parameter-encoding default-charset="UTF-8"/>
  <jsp-config>
    <property name="keepgenerated" value="true">
      <description>Keep a copy of the generated servlet class' java code.</description>
    </property>
  </jsp-config>
</glassfish-web-app>

The class-loader property was marked with the attribute

delegate=false

, I think that was my mistake, because as Glassfish Deployment Guide say, this attribute must be true when you are exposing services. https://javaee.github.io/glassfish/doc/4.0/application-deployment-guide.pdf#G11.1006531 The solution that worked for me was remove that file and keep only the Standard Deployment Descriptor(web.xml).

Hope this help.

Solution 4:^[4]

I had this same problem with JBOSS6 server. After adding jersey-media-moxy dependency to pom file, it was worked.

<dependency>
    <groupId>org.glassfish.jersey.media</groupId>
    <artifactId>jersey-media-moxy</artifactId>
    <version>2.25.1</version>
</dependency>

Solution 5:^[5]

I solved the issue by adding both jersey-common and jersey-media-json-jackson. Removed jersey-bean-validation.

    <dependency>
        <artifactId>jersey-common</artifactId>
        <groupId>org.glassfish.jersey.core</groupId>
        <version>2.29.1</version>
    </dependency>
    <dependency>
        <groupId>org.glassfish.jersey.media</groupId>
        <artifactId>jersey-media-json-jackson</artifactId>
        <version>2.29.1</version>
    </dependency>
    <!--<dependency>
        <artifactId>jersey-bean-validation</artifactId>
        <groupId>org.glassfish.jersey.ext</groupId>
        <version>2.29.1</version>
    </dependency>-->

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source
Solution 1	thoredge
Solution 2	Josh
Solution 3	Luis Carlos
Solution 4	Darshimala
Solution 5	rmysari

'java.lang.ClassCastException: org.glassfish.jersey.jackson.internal.JacksonAutoDiscoverable cannot be cast to spi.AutoDiscoverable

Solution 1:[1]

Solution 2:[2]

Solution 3:[3]

Solution 4:[4]

Solution 5:[5]