The ResourceConfig instance does not contain any root resource classes

Question

What's going wrong here?

The ResourceConfig instance does not contain any root resource classes.
Dec 10, 2010 10:21:24 AM com.sun.jersey.spi.spring.container.servlet.SpringServlet initiate
SEVERE: Exception occurred when intialization
com.sun.jersey.api.container.ContainerException: The ResourceConfig instance does not contain any root resource classes.
        at com.sun.jersey.server.impl.application.RootResourceUriRules.<init>(RootResourceUriRules.java:103)
        at com.sun.jersey.server.impl.application.WebApplicationImpl._initiate(WebApplicationImpl.java:1182)
        at com.sun.jersey.server.impl.application.WebApplicationImpl.access$600(WebApplicationImpl.java:161)
        at com.sun.jersey.server.impl.application.WebApplicationImpl$12.f(WebApplicationImpl.java:698)
        at com.sun.jersey.server.impl.application.WebApplicationImpl$12.f(WebApplicationImpl.java:695)
        at com.sun.jersey.spi.inject.Errors.processWithErrors(Errors.java:197)
        at com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:695)
        at com.sun.jersey.spi.spring.container.servlet.SpringServlet.initiate(SpringServlet.java:117)

Filter:

<filter>
    <filter-name>JerseyFilter</filter-name>
    <filter-class>com.sun.jersey.spi.spring.container.servlet.SpringServlet</filter-class>

    <init-param>
        <param-name>com.sun.jersey.config.feature.Redirect</param-name>
        <param-value>true</param-value>
    </init-param>

    <init-param>
        <param-name>com.sun.jersey.config.property.JSPTemplatesBasePath</param-name>
        <param-value>/views/</param-value>
    </init-param>

    <init-param>
        <param-name>com.sun.jersey.config.property.WebPageContentRegex</param-name>
        <param-value>/(images|css|jsp)/.*</param-value>
    </init-param>
</filter>

<filter-mapping>
    <filter-name>JerseyFilter</filter-name>
    <url-pattern>/myresource/*</url-pattern>
</filter-mapping>

Code:

@Path ("/admin")
public class AdminUiResource {

  @GET
  @Produces ("text/html")
  @Path ("/singup")
  public Viewable getSignUp () {
    return new Viewable("/public/signup", "Test");
  }
}

Answer 1

Have you tried adding

<init-param>
  <param-name>com.sun.jersey.config.property.packages</param-name>
  <param-value>my.package.name</param-value>
</init-param>

to your SpringServlet definition? Obviously replace my.package.name with the package that AdminUiResource is in and make sure it is in the classpath.

Answer 2

I am new to Jersey - I had the same issue, But when I removed the "/" and just used the @path("admin") it worked.

@Path("admin")
public class AdminUiResource { ... }

Answer 3

YOU NEED TO ADD YOUR PACKAGE NAME AT

<init-param>
  <param-name>com.sun.jersey.config.property.packages</param-name>
  <param-value>your.package.name</param-value>
</init-param>

ALSO ONE SILLY THING I HAVE NOTICED,
I Need to refresh my project after MAVEN BUILD else it show me same error.
Please comment If you know reason why we need to refresh project?

Answer 4

This means, it couldn't find any class which can be executed as jersey RESTful web service.

Check:

• Whether 'com.sun.jersey.config.property.packages' is missing in your web.xml.
• Whether value for 'com.sun.jersey.config.property.packages' param is missing or invalid (the mentioned package doesn't exists). It should be a package where you have put your POJO classes which runs as jersey services.
• Whether there exists at least one POJO class, which has a method annotated with @Path attribute.

Answer 5

Your resource package should contain at least one pojo which is either annotated with @Path or have at least one method annotated with @Path or a request method designator, such as @GET, @PUT, @POST, or @DELETE. Resource methods are methods of a resource class annotated with a request method designator. This resolved my issue...

Answer 6

I ran across this problem with JBOSS EAP 6.1. I was able to deploy my code through eclipse to the JBOSS server but once I attempted to deploy the file as a WAR file to JBOSS I started getting this error.

The solution was configuring the web.xml to work properly with JBOSS by allowing the two to work together.

The following two lines were commented out in web.xml to allow JBOSS to do it's own configurations

<!--  
    <init-param>
    <param-name>com.sun.jersey.config.property.packages</param-name>
    <param-value>com.your.package</param-value>
</init-param> -->

And then add the following context params after

<context-param>
    <param-name>resteasy.scan</param-name>
    <param-value>false</param-value>
</context-param>
<context-param>
    <param-name>resteasy.scan.resources</param-name>
    <param-value>false</param-value>
</context-param>
<context-param>
    <param-name>resteasy.scan.providers</param-name>
    <param-value>false</param-value>
</context-param>