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POrestful web-service - I get java.lang.IncompatibleClassChangeError
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  1. POrestful web-service - I get java.lang.IncompatibleClassChangeError
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    copied!<p>Hi I am new to web service I have googled for this many times. Could not get correct solution. This error occurs when I typed the path for my class. any body pls help</p> <p>exception: </p> <pre><code>javax.servlet.ServletException: Servlet execution threw an exception </code></pre> <p>root cause: </p> <pre><code>java.lang.IncompatibleClassChangeError: Class javax.ws.rs.core.Response$Status does not implement the requested interface javax.ws.rs.core.Response$StatusType com.sun.jersey.spi.container.ContainerResponse.getStatus(ContainerResponse.java:599) com.sun.jersey.spi.container.ContainerResponse$CommittingOutputStream.commitWrite(ContainerResponse.java:157) com.sun.jersey.spi.container.ContainerResponse$CommittingOutputStream.write(ContainerResponse.java:134) sun.nio.cs.StreamEncoder.writeBytes(Unknown Source) sun.nio.cs.StreamEncoder.implFlushBuffer(Unknown Source) sun.nio.cs.StreamEncoder.implFlush(Unknown Source) sun.nio.cs.StreamEncoder.flush(Unknown Source) java.io.OutputStreamWriter.flush(Unknown Source) java.io.BufferedWriter.flush(Unknown Source) com.sun.jersey.core.util.ReaderWriter.writeToAsString(ReaderWriter.java:191) com.sun.jersey.core.provider.AbstractMessageReaderWriterProvider.writeToAsString(AbstractMessageReaderWriterProvider.java:128) com.sun.jersey.core.impl.provider.entity.StringProvider.writeTo(StringProvider.java:88) com.sun.jersey.core.impl.provider.entity.StringProvider.writeTo(StringProvider.java:58) com.sun.jersey.spi.container.ContainerResponse.write(ContainerResponse.java:302) com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1510) com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1419) com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1409) com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:409) com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:540) com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:715) javax.servlet.http.HttpServlet.service(HttpServlet.java:723) note The full stack trace of the root cause is available in the Apache Tomcat/6.0.37 logs. </code></pre> <p>My Hello Program is this :</p> <pre><code>import javax.ws.rs.GET; import javax.ws.rs.Path; import javax.ws.rs.Produces; import javax.ws.rs.core.MediaType; // Plain old Java Object it does not extend as class or implements // an interface // The class registers its methods for the HTTP GET request using the @GET annotation. // Using the @Produces annotation, it defines that it can deliver several MIME types, // text, XML and HTML. // The browser requests per default the HTML MIME type. //Sets the path to base URL + /hello @Path("/hello") public class Hello { // This method is called if TEXT_PLAIN is request @GET @Produces(MediaType.TEXT_PLAIN) public String sayPlainTextHello() { return "Hello Jersey"; } // This method is called if XML is request @GET @Produces(MediaType.TEXT_XML) public String sayXMLHello() { return "&lt;?xml version=\"1.0\"?&gt;" + "&lt;hello&gt; Hello Jersey" + "&lt;/hello&gt;"; } // This method is called if HTML is request @GET @Produces(MediaType.TEXT_HTML) public String sayHtmlHello() { return "&lt;html&gt; " + "&lt;title&gt;" + "Hello Jersey" + "&lt;/title&gt;" + "&lt;body&gt;&lt;h1&gt;" + "Hello Jersey" + "&lt;/body&gt;&lt;/h1&gt;" + "&lt;/html&gt; "; } } </code></pre> <p>and my web.xml file is this.</p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5"&gt; &lt;display-name&gt;FirstRestWebService&lt;/display-name&gt; &lt;display-name&gt;FirstRestWebService&lt;/display-name&gt; &lt;servlet&gt; &lt;servlet-name&gt;RestServlet&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;org.raj&lt;/param-value&gt; &lt;/init-param&gt; &lt;/servlet&gt; &lt;servlet-mapping&gt; &lt;servlet-name&gt;RestServlet&lt;/servlet-name&gt; &lt;url-pattern&gt;/rest/*&lt;/url-pattern&gt; &lt;/servlet-mapping&gt; &lt;/web-app&gt; </code></pre> <p>pls anybody help.</p>
 

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