I'm updating my WebSocket game from Jetty 8 to Jetty 9. I have a little embedded test server that I use to launch the game for debugging, which works in Jetty 8. After updating the .jar files to 9 and refactoring my WebSocket classes to the new paradigm in 9, I can launch the embedded test server, but when I connect to it in the browser, I get the below error and stack trace.
Manually breakpointing the callstack shows that it is failing on loading org.eclipse.jetty.util.component.Container, which is strange because it seemingly creates such Containers with ease in the launch of the server. This link is a screenshot of my build path in Eclipse: http://imgur.com/d7XOgsM The app builds with GWT 2.6. Any ideas on what I'm missing here? java.lang.IncompatibleClassChangeError: Implementing class at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:800) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:449) at java.net.URLClassLoader.access$100(URLClassLoader.java:71) at java.net.URLClassLoader$1.run(URLClassLoader.java:361) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:421) at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:383) at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:800) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:449) at java.net.URLClassLoader.access$100(URLClassLoader.java:71) at java.net.URLClassLoader$1.run(URLClassLoader.java:361) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:421) at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:383) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:270) at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:363) at java.util.ServiceLoader$1.next(ServiceLoader.java:445) at org.eclipse.jetty.websocket.servlet.WebSocketServletFactory$Loader.load(WebSocketServletFactory.java:56) at org.eclipse.jetty.websocket.servlet.WebSocketServletFactory$Loader.create(WebSocketServletFactory.java:42) at org.eclipse.jetty.websocket.servlet.WebSocketServlet.init(WebSocketServlet.java:128) at javax.servlet.GenericServlet.init(GenericServlet.java:244) at org.eclipse.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:534) at org.eclipse.jetty.servlet.ServletHolder.getServlet(ServletHolder.java:417) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:659) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:501) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:557) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1086) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:428) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1020) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116) at org.eclipse.jetty.server.Server.handle(Server.java:366) at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:489) at org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:949) at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:1011) at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:644) at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235) at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82) at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:668) at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:52) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608) at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543) at java.lang.Thread.run(Thread.java:744)
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