Jetty IncompatibleClassChangeError: Implementing class

[b-ryce via StackOverflow]

I had an app that was running fine with app engine 1.7.1, but when I upgraded to 1.7.5 all my library dependencies were broken.

So I think I got all the dependencies corrected, so at least I don't have any compile time errors, but when I try and run it I get the following error:

Mar 15, 2013 11:09:34 AM com.google.apphosting.utils.jetty.JettyLogger warn
WARNING: failed Jersey Web Application: java.lang.IncompatibleClassChangeError: Implementing class
Mar 15, 2013 11:09:34 AM com.google.apphosting.utils.jetty.JettyLogger warn
WARNING: failed com.google.appengine.tools.development.DevAppEngineWebAppContext@c65fb1{/,/Users/bbarrand12/Documents/Eclipse/Workspace/MovieFoneToGo/war}: java.lang.IncompatibleClassChangeError: Implementing class
Mar 15, 2013 11:09:34 AM com.google.apphosting.utils.jetty.JettyLogger warn
WARNING: failed JettyContainerService$ApiProxyHandler@5dfa490: java.lang.IncompatibleClassChangeError: Implementing class
Mar 15, 2013 11:09:34 AM 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:213)
    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.<init>(PackagesResourceConfig.java:78)
    at com.sun.jersey.api.core.PackagesResourceConfig.<init>(PackagesResourceConfig.java:89)
    at com.sun.jersey.spi.container.servlet.WebComponent.createResourceConfig(WebComponent.java:700)
    at com.sun.jersey.spi.container.servlet.WebComponent.createResourceConfig(WebComponent.java:678)
    at com.sun.jersey.spi.container.servlet.WebComponent.init(WebComponent.java:203)
    at com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:374)
    at com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:557)
    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:228)
    at com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:255)
    at com.google.appengine.tools.development.AbstractServer.startup(AbstractServer.java:79)
    at com.google.appengine.tools.development.DevAppServerImpl$Servers.startup(DevAppServerImpl.java:451)
    at com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:198)
    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.<init>(DevAppServerMain.java:269)
    at com.google.appengine.tools.development.DevAppServerMain.main(DevAppServerMain.java:245)

Any ideas why this is broken. Perhaps I just to update some of my other jars?

Here are my dependencies:

Please DO NOT REPLY directly to this email but go to StackOverflow:
http://stackoverflow.com/questions/15436058/jetty-incompatibleclasschangeerror-implementing-class

[MikO via StackOverflow]

I think there could be a compatibility problem between Jersey and GAE. According to this, Jersey versions that are now compatible with Google App Engine are 1.5 and 1.1.5.

This post may also help.

Please DO NOT REPLY directly to this email but go to StackOverflow:

http://stackoverflow.com/questions/15436058/jetty-incompatibleclasschangeerror-implementing-class/15438069#15438069