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POJava Jersey Rest : No provider classes found. (404 error when accessing URL)
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  1. POJava Jersey Rest : No provider classes found. (404 error when accessing URL)
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    copied!<blockquote> <p><strong>Edit:</strong> I hadn't realized that all request were first going into "Apache" and then were redirected to Tomcat. I added a new redirection in the <code>apache2.conf</code> file. See the <a href="https://stackoverflow.com/a/6597100">accepted answer</a> for details.</p> </blockquote> <p>I am having the exact same problem as this question. <a href="https://stackoverflow.com/questions/6111074/jersey-rest-the-resourceconfig-instance-does-not-contain-any-root-resource-classe">Jersey REST The ResourceConfig instance does not contain any root resource classes</a> However the user never answered the question.</p> <p>I am using Tomcat, without maven. I followed this tutorial. <a href="http://www.ibm.com/developerworks/web/library/wa-aj-tomcat/index.html" rel="nofollow noreferrer">http://www.ibm.com/developerworks/web/library/wa-aj-tomcat/index.html</a></p> <p>I made changes to web.xml as per the article<br> i.e the new servlet and servlet mapping was created with the correct package name.</p> <pre><code>&lt;servlet&gt; &lt;servlet-name&gt;Jersey REST Service&lt;/servlet-name&gt; &lt;servlet-class&gt; com.sun.jersey.spi.container.servlet.ServletContainer &lt;/servlet-class&gt; &lt;init-param&gt; &lt;param-name&gt;com.sun.jersey.config.property.packages&lt;/param-name&gt; &lt;param-value&gt;sample.hello.resources&lt;/param-value&gt; &lt;/init-param&gt; &lt;load-on-startup&gt;1&lt;/load-on-startup&gt; &lt;/servlet&gt; &lt;servlet-mapping&gt; &lt;servlet-name&gt;Jersey REST Service&lt;/servlet-name&gt; &lt;url-pattern&gt;/rest/*&lt;/url-pattern&gt; &lt;/servlet-mapping&gt; </code></pre> <p>I have deployed the following jars to tomcat</p> <pre><code>asm.jar jersey-server.jar jersey-core.jar jsr311.jar </code></pre> <p>The tomcat startup log has the following exceptions.</p> <pre><code> com.sun.jersey.api.core.PackagesResourceConfig init INFO: Scanning for root resource and provider classes in the packages: sample.hello.resources com.sun.jersey.api.core.ScanningResourceConfig logClasses INFO: Root resource classes found: class sample.hello.resources.HelloResource com.sun.jersey.api.core.ScanningResourceConfig init INFO: No provider classes found. com.sun.jersey.server.impl.application.WebApplicationImpl _initiate INFO: Initiating Jersey application, version 'Jersey: 1.8 06/24/2011 12:17 PM' </code></pre> <p>When I access the URL I get a 404. <a href="http://localhost:8080/Jersey/rest/hello" rel="nofollow noreferrer">http://localhost:8080/Jersey/rest/hello</a></p> <p>The code:</p> <pre><code>import javax.ws.rs.GET; import javax.ws.rs.Path; import javax.ws.rs.Produces; import javax.ws.rs.core.MediaType; @Path("/hello") public class HelloResource { @GET @Produces(MediaType.TEXT_PLAIN) public String sayHello() { return "Hello Jersey"; } } </code></pre> <p>I do not see any other exceptions in the logs</p>
 

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