Try clean and build everything again. And make sure all classes are enhanced 
properly by data nucleus.

Hth

----- Reply message -----
From: "hiran.suvrat" <[email protected]>
Date: Sat, Apr 16, 2011 3:15 am
Subject: [appengine-java] Re: My application works well in eclipse but when I 
deploy the same code in GAE it shows the following error while opening the 
homepage
To: "Google App Engine for Java" <[email protected]>

Can anyone help with the above problems?

On Apr 9, 10:58 am, "hiran.suvrat" <[email protected]> wrote:
> Hi,
> Tweet_now is a servlet which i have made. when i run it on the local
> server it works fine. but after deployment to google app engine server
> this error occurs. i am using netbeans to create war file but i am not
> able to deploy it to the server through netbeans. i am using command
> line to deploy on server.
>
> thanks
>
> On Apr 8, 12:42 pm, Amit Pandey <[email protected]> wrote:
>
>
>
>
>
>
>
> > As per your exception* tweet_now* class is not available for JVM. If you
> > have created this class, make sure you have imported it. OR if you are using
> > jar file for this class, make sure you have added the jar file to the class
> > path.
>
> > Just to clarify- Are you using eclipse to deploy the code in app engine?
>
> > Thanks,
> >  Amit
>
> > On Fri, Apr 8, 2011 at 11:49 AM, hiran.suvrat 
> > <[email protected]>wrote:> I have a similar problem and the error log 
> > is.. Thank you for the help
>
> > > 500 776ms 956cpu_ms 0kb Mozilla/5.0 (Windows; U; Windows NT 5.1; en-
> > > US) AppleWebKit/534.16 (KHTML, like Gecko) Chrome/10.0.648.133 Safari/
> > > 534.16,gzip(gfe)
> > > 203.110.243.21 - - [30/Mar/2011:14:33:44 -0700] "GET / HTTP/1.1" 500 0
> > > - "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/534.16
> > > (KHTML, like Gecko) Chrome/10.0.648.133 Safari/534.16,gzip(gfe)"
> > > "sentiment-app.appspot.com" ms=777 cpu_ms=957 api_cpu_ms=0
> > > cpm_usd=0.026614 loading_request=1
> > > W 2011-03-30 14:33:44.409
> > > EXCEPTION
> > > java.lang.ClassNotFoundException: tweet_now
> > >        at
> > > com.google.appengine.runtime.Request.process-01e974251f42de3f(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.net.rpc.impl.RpcUtil.runRpcInApplication(RpcUtil.java:
> > > 437)
> > >        at com.google.net.rpc.impl.Server$RpcTask.runInContext(Server.java:
> > > 573)
> > >        at com.google.tracing.TraceContext$TraceContextRunnable
> > > $1.run(TraceContext.java:448)
> > >        at com.google.tracing.TraceContext.runInContext(TraceContext.java:
> > > 688)
> > >        at com.google.tracing.TraceContext
>
> > > $AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.jav
> > >  a:
> > > 326)
> > >        at com.google.tracing.TraceContext
> > > $AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:
> > > 318)
> > >        at com.google.tracing.TraceContext
> > > $TraceContextRunnable.run(TraceContext.java:446)
> > >        at
> > > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:
> > > 1110)
> > >        at java.util.concurrent.ThreadPoolExecutor
> > > $Worker.run(ThreadPoolExecutor.java:603)
> > >        at java.lang.Thread.run(Thread.java:636)
> > > E 2011-03-30 14:33:44.410
> > > javax.servlet.ServletContext log: unavailable
> > > javax.servlet.UnavailableException: tweet_now
> > >        at org.mortbay.jetty.servlet.Holder.doStart(Holder.java:79)
> > >        at
> > > org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:
> > > 242)
> > >        at
> > > org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:
> > > 50)
> > >        at
> > > org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:
> > > 685)
> > >        at org.mortbay.jetty.servlet.Context.startContext(Context.java:140)
> > >        at
> > > org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:
> > > 1250)
> > >        at
> > > org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:
> > > 517)
> > >        at
> > > org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:
> > > 467)
> > >        at
> > > org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:
> > > 50)
> > >        at
>
> > > com.google.apphosting.runtime.jetty.AppVersionHandlerMap.createHandler(AppV
> > >  ersionHandlerMap.java:
> > > 191)
> > >        at
>
> > > com.google.apphosting.runtime.jetty.AppVersionHandlerMap.getHandler(AppVers
> > >  ionHandlerMap.java:
> > > 168)
> > >        at
>
> > > com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceReques
> > >  t(JettyServletEngineAdapter.java:
> > > 123)
> > >        at
> > > com.google.apphosting.runtime.JavaRuntime.handleRequest(JavaRuntime.java:
> > > 261)
> > >        at com.google.apphosting.base.RuntimePb$EvaluationRuntime
> > > $2.handleRequest(RuntimePb.java:9285)
> > >        at 
> > > com.google.net.rpc.impl.RpcUtil.runRpcInApplication(RpcUtil.java:
> > > 437)
> > >        at com.google.net.rpc.impl.Server$RpcTask.runInContext(Server.java:
> > > 573)
> > >        at com.google.tracing.TraceContext$TraceContextRunnable
> > > $1.run(TraceContext.java:448)
> > >        at com.google.tracing.TraceContext.runInContext(TraceContext.java:
> > > 688)
> > >        at com.google.tracing.TraceContext
>
> > > $AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.jav
> > >  a:
> > > 326)
> > >        at com.google.tracing.TraceContext
> > > $AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:
> > > 318)
> > >        at com.google.tracing.TraceContext
> > > $TraceContextRunnable.run(TraceContext.java:446)
> > >        at
> > > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:
> > > 1110)
> > >        at java.util.concurrent.ThreadPoolExecutor
> > > $Worker.run(ThreadPoolExecutor.java:603)
> > >        at java.lang.Thread.run(Thread.java:636)
> > > W 2011-03-30 14:33:44.414
> > > Failed startup of context
> > > com.google.apphosting.utils.jetty.RuntimeAppEngineWebAppContext@13c33b7
> > > {/,/
> > > base/data/home/apps/sentiment-app/1.349208838425736194}
> > > java.lang.NullPointerException
> > >        at java.lang.Class.isAssignableFrom(Native Method)
> > >        at
> > > org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:
> > > 256)
> > >        at
> > > org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:
> > > 50)
> > >        at
> > > org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:
> > > 685)
> > >        at org.mortbay.jetty.servlet.Context.startContext(Context.java:140)
> > >        at
> > > org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:
> > > 1250)
> > >        at
> > > org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:
> > > 517)
> > >        at
> > > org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:
> > > 467)
> > >        at
> > > org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:
> > > 50)
> > >        at
>
> > > com.google.apphosting.runtime.jetty.AppVersionHandlerMap.createHandler(AppV
> > >  ersionHandlerMap.java:
> > > 191)
> > >        at
>
> > > com.google.apphosting.runtime.jetty.AppVersionHandlerMap.getHandler(AppVers
> > >  ionHandlerMap.java:
> > > 168)
> > >        at
>
> > > com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceReques
> > >  t(JettyServletEngineAdapter.java:
> > > 123)
> > >        at
> > > com.google.apphosting.runtime.JavaRuntime.handleRequest(JavaRuntime.java:
> > > 261)
> > >        at com.google.apphosting.base.RuntimePb$EvaluationRuntime
> > > $2.handleRequest(RuntimePb.java:9285)
> > >        at 
> > > com.google.net.rpc.impl.RpcUtil.runRpcInApplication(RpcUtil.java:
> > > 437)
> > >        at com.google.net.rpc.impl.Server$RpcTask.runInContext(Server.java:
> > > 573)
> > >        at com.google.tracing.TraceContext$TraceContextRunnable
> > > $1.run(TraceContext.java:448)
> > >        at com.google.tracing.TraceContext.runInContext(TraceContext.java:
> > > 688)
> > >        at com.google.tracing.TraceContext
>
> > > $AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.jav
> > >  a:
> > > 326)
> > >        at com.google.tracing.TraceContext
> > > $AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:
> > > 318)
> > >        at com.google.tracing.TraceContext
> > > $TraceContextRunnable.run(TraceContext.java:446)
> > >        at
> > > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:
> > > 1110)
> > >        at java.util.concurrent.ThreadPoolExecutor
> > > $Worker.run(ThreadPoolExecutor.java:603)
> > >        at java.lang.Thread.run(Thread.java:636)
> > > C 2011-03-30 14:33:44.418
> > > Uncaught exception from servlet
> > > javax.servlet.UnavailableException: Initialization failed.
> > >        at
>
> > > com.google.apphosting.runtime.jetty.AppVersionHandlerMap.createHandler(AppV
> > >  ersionHandlerMap.java:
> > > 200)
> > >        at
>
> > > com.google.apphosting.runtime.jetty.AppVersionHandlerMap.getHandler(AppVers
> > >  ionHandlerMap.java:
> > > 168)
> > >        at
>
> > > com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceReques
> > >  t(JettyServletEngineAdapter.java:
> > > 123)
> > >        at
> > > com.google.apphosting.runtime.JavaRuntime.handleRequest(JavaRuntime.java:
> > > 261)
> > >        at com.google.apphosting.base.RuntimePb$EvaluationRuntime
>
> ...
>
> read more »

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