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POfailed Jersey REST Service: java.lang.IncompatibleClassChangeError: Implementing class
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  1. POfailed Jersey REST Service: java.lang.IncompatibleClassChangeError: Implementing class
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    copied!<p>I was hopeful that Jersey would deploy easily to Google App Engine, as it is supposedly supported ( <a href="http://code.google.com/p/googleappengine/wiki/WillItPlayInJava" rel="nofollow">http://code.google.com/p/googleappengine/wiki/WillItPlayInJava</a> ) and several people mention they made it work ( <a href="http://tugdualgrall.blogspot.ca/2010/02/create-and-deploy-jax-rs-rest-service.html" rel="nofollow">http://tugdualgrall.blogspot.ca/2010/02/create-and-deploy-jax-rs-rest-service.html</a>) But it does not work...</p> <ul> <li>I created a new project with the gae plugin for eclipse (using gae sdk 1.7.3)</li> <li><p>I added to my web.xml :</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;init-param&gt; &lt;param-name&gt;com.sun.jersey.config.feature.DisableWADL&lt;/param-name&gt; &lt;param-value&gt;true&lt;/param-value&gt; &lt;/init-param&gt; &lt;load-on-startup&gt;1&lt;/load-on-startup&gt; &lt;/servlet&gt; </code></pre></li> <li><p>I added to the classpath : jersey-bundle-1.14.jar (I even tried with only core, servlet, and server AND I even tried with 1.5 only)</p></li> </ul> <p>but I still get stuck with this :</p> <pre><code> WARNING: failed Jersey REST Service: java.lang.IncompatibleClassChangeError: Implementing class Oct 27, 2012 6:17:06 PM com.google.apphosting.utils.jetty.JettyLogger warn WARNING: failed com.google.appengine.tools.development.DevAppEngineWebAppContext@68c12474{/,/Users/anthony/workspaces/gae/restfulapp/war}: java.lang.IncompatibleClassChangeError: Implementing class Oct 27, 2012 6:17:06 PM com.google.apphosting.utils.jetty.JettyLogger warn WARNING: failed JettyContainerService$ApiProxyHandler@365878d2: java.lang.IncompatibleClassChangeError: Implementing class Oct 27, 2012 6:17:06 PM com.google.apphosting.utils.jetty.JettyLogger warn WARNING: Error starting handlers java.lang.IncompatibleClassChangeError: Implementing class at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631) at java.lang.ClassLoader.defineClass(ClassLoader.java:615) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) at java.net.URLClassLoader.access$000(URLClassLoader.java:58) at java.net.URLClassLoader$1.run(URLClassLoader.java:197) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at com.google.appengine.tools.development.IsolatedAppClassLoader.loadClass(IsolatedAppClassLoader.java:207) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) at com.sun.jersey.api.core.ScanningResourceConfig.init(ScanningResourceConfig.java:79) at com.sun.jersey.api.core.PackagesResourceConfig.init(PackagesResourceConfig.java:104) at com.sun.jersey.api.core.PackagesResourceConfig.&lt;init&gt;(PackagesResourceConfig.java:78) at com.sun.jersey.api.core.PackagesResourceConfig.&lt;init&gt;(PackagesResourceConfig.java:89) at com.sun.jersey.spi.container.servlet.WebComponent.createResourceConfig(WebComponent.java:696) at com.sun.jersey.spi.container.servlet.WebComponent.createResourceConfig(WebComponent.java:674) at com.sun.jersey.spi.container.servlet.WebComponent.init(WebComponent.java:206) at com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:373) at com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:556) at javax.servlet.GenericServlet.init(GenericServlet.java:212) at org.mortbay.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:440) at org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:263) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:685) at org.mortbay.jetty.servlet.Context.startContext(Context.java:140) at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1250) at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517) at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:467) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130) at org.mortbay.jetty.Server.doStart(Server.java:224) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at com.google.appengine.tools.development.JettyContainerService.startContainer(JettyContainerService.java:205) at com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:249) at com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:157) at com.google.appengine.tools.development.DevAppServerMain$StartAction.apply(DevAppServerMain.java:333) at com.google.appengine.tools.util.Parser$ParseResult.applyArgs(Parser.java:48) at com.google.appengine.tools.development.DevAppServerMain.&lt;init&gt;(DevAppServerMain.java:269) at com.google.appengine.tools.development.DevAppServerMain.main(DevAppServerMain.java:245) </code></pre> <p>What did I miss ? Should I use another jax-rs implementation for gae ? Thanks for your answers !</p>
 

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