Hi,
My application was running fine when i change my jersey version to 1.1.0-ea 
to any other version below the error coming

   1. 
   
   java.lang.ClassNotFoundException: 
com.sun.jersey.spi.container.servlet.ServletContainer
        at 
com.google.appengine.runtime.Request.process-4febceaa861db840(Request.java)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
        at org.mortbay.util.Loader.loadClass(Loader.java:91)
        at org.mortbay.util.Loader.loadClass(Loader.java:71)
        at org.mortbay.jetty.servlet.Holder.doStart(Holder.java:73)
        at 
org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:242)
        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 
com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:454)
        at 
com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:461)
        at com.google.tracing.TraceContext.runInContext(TraceContext.java:703)
        at 
com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:338)
        at 
com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:330)
        at 
com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:458)
        at java.lang.Thread.run(Thread.java:679)
   
   2. E2012-11-11 21:39:08.581
   
   javax.servlet.ServletContext log: unavailable
   javax.servlet.UnavailableException: 
com.sun.jersey.spi.container.servlet.ServletContainer
        at org.mortbay.jetty.servlet.Holder.doStart(Holder.java:79)
        at 
org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:242)
        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 
com.google.apphosting.runtime.jetty.AppVersionHandlerMap.createHandler(AppVersionHandlerMap.java:219)
        at 
com.google.apphosting.runtime.jetty.AppVersionHandlerMap.getHandler(AppVersionHandlerMap.java:194)
        at 
com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:134)
        at 
com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run(JavaRuntime.java:447)
        at 
com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:454)
        at 
com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:461)
        at com.google.tracing.TraceContext.runInContext(TraceContext.java:703)
        at 
com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:338)
        at 
com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:330)
        at 
com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:458)
        at 
com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:251)
        at java.lang.Thread.run(Thread.java:679)
   
   3. W2012-11-11 21:39:08.582
   
   Failed startup of context 
com.google.apphosting.utils.jetty.RuntimeAppEngineWebAppContext@caea19{/,/base/data/home/apps/vhelpchatengine/bug.363112280290854102}
   java.lang.NullPointerException
        at java.lang.Class.isAssignableFrom(Native Method)
        at 
org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:256)
        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 
com.google.apphosting.runtime.jetty.AppVersionHandlerMap.createHandler(AppVersionHandlerMap.java:219)
        at 
com.google.apphosting.runtime.jetty.AppVersionHandlerMap.getHandler(AppVersionHandlerMap.java:194)
        at 
com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:134)
        at 
com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run(JavaRuntime.java:447)
        at 
com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:454)
        at 
com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:461)
        at com.google.tracing.TraceContext.runInContext(TraceContext.java:703)
        at 
com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:338)
        at 
com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:330)
        at 
com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:458)
        at 
com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:251)
        at java.lang.Thread.run(Thread.java:679)
   
   4. C2012-11-11 21:39:08.583
   
   Uncaught exception from servlet
   javax.servlet.UnavailableException: Initialization failed.
        at 
com.google.apphosting.runtime.jetty.AppVersionHandlerMap.createHandler(AppVersionHandlerMap.java:228)
        at 
com.google.apphosting.runtime.jetty.AppVersionHandlerMap.getHandler(AppVersionHandlerMap.java:194)
        at 
com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:134)
        at 
com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run(JavaRuntime.java:447)
        at 
com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:454)
        at 
com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:461)
        at com.google.tracing.TraceContext.runInContext(TraceContext.java:703)
        at 
com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:338)
        at 
com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:330)
        at 
com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:458)
        at 
com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:251)
        at java.lang.Thread.run(Thread.java:679)
   
   Kindly guide as its stopping an urgent release.
   
   Regards
   
   Sunny Singh
   
   
   
   

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