Tomcat giving 500 error on page load
Solution 1
Best way how to start is look at tested working samples. So.. please see following:
Helloworld-webapp: https://maven.java.net/content/repositories/releases/com/sun/jersey/samples/helloworld-webapp/1.9.1/helloworld-webapp-1.9.1-gf-project.zip
And by the way, that error message means "Jersey is not able to find ANY @Path annotated class". My bet would be on this:
<init-param>
<param-name>com.sun.jersey.config.property.packages</param-name>
<param-value>first</param-value>
</init-param>
Is "first" really name of the package where "Hello" class resides?
Solution 2
In jersey 2.x docs use
<init-param>
<param-name>jersey.config.server.provider.packages</param-name>
<param-value>com.rest.portal</param-value>
</init-param>
Comments
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Skizit almost 2 years
I'm new to tomcat and jersey so hopefully this isn't a stupid mistake. Whenever I try and access my project located at
http://127.0.0.1:8080/first/rest/hello
I get the following error...javax.servlet.ServletException: Servlet.init() for servlet Jersey REST Service threw exception org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100) org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:405) org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:269) org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:515) org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302) java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) java.lang.Thread.run(Thread.java:679) root cause com.sun.jersey.api.container.ContainerException: The ResourceConfig instance does not contain any root resource classes. com.sun.jersey.server.impl.application.RootResourceUriRules.<init> (RootResourceUriRules.java:99) com.sun.jersey.server.impl.application.WebApplicationImpl._initiate(WebApplicationIm pl.java:1298) com.sun.jersey.server.impl.application.WebApplicationImpl.access$700(WebApplicationImpl.java:169) com.sun.jersey.server.impl.application.WebApplicationImpl$13.f(WebApplicationImpl.java:775) com.sun.jersey.server.impl.application.WebApplicationImpl$13.f(WebApplicationImpl.java:771) com.sun.jersey.spi.inject.Errors.processWithErrors(Errors.java:193) com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:771) com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:766) com.sun.jersey.spi.container.servlet.ServletContainer.initiate(ServletContainer.java:488) com.sun.jersey.spi.container.servlet.ServletContainer$InternalWebComponent.initiate(ServletContainer.java:318) com.sun.jersey.spi.container.servlet.WebComponent.load(WebComponent.java:609) com.sun.jersey.spi.container.servlet.WebComponent.init(WebComponent.java:210) com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:373) com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:556) javax.servlet.GenericServlet.init(GenericServlet.java:160) org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100) org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:405) org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:269) org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:515) org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302) java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) java.lang.Thread.run(Thread.java:679)
I've got a Java class and a web.xml file for this project. They are the following...
Hello.java
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 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 "<?xml version=\"1.0\"?>" + "<hello> Hello Jersey" + "</hello>"; } // This method is called if HTML is request @GET @Produces(MediaType.TEXT_HTML) public String sayHtmlHello() { return "<html> " + "<title>" + "Hello Jersey" + "</title>" + "<body><h1>" + "Hello Jersey" + "</body></h1>" + "</html> "; } }
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" 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"> <display-name>first</display-name> <servlet> <servlet-name>Jersey REST Service</servlet-name> <servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class> <init-param> <param-name>com.sun.jersey.config.property.packages</param-name> <param-value>first</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>Jersey REST Service</servlet-name> <url-pattern>/rest/*</url-pattern> </servlet-mapping> </web-app>
What am I missing?
EDIT: It's probably relevant that I've been using the following tutorial to get started. http://www.vogella.de/articles/REST/article.html#first