Margus Pala is fixing IT!

You finally get your JSF running on google appengine SDK, upload it to real appengine and of course this is not working, message states:

Error: Server Error
The server encountered an error and could not complete your request.
If the problem persists, please report your problem and mention this error message and the query that caused it

You get the stacktrace and logs from Google app engine managment site https://appengine.google.com/ an you see

1-19 11:55AM 06.087 / 500 2259ms 3130cpu_ms 0kb Mozilla/5.0 (X11; U; Linux x86_64; et; rv:1.9.1.7) Gecko/20100106 Ubuntu/9.10 (karmic) Firefox/3.5.7,gzip(gfe),gzip(gfe)
See details
90.191.101.95 - - [19/Jan/2010:11:55:08 -0800] "GET / HTTP/1.1" 500 0 - "Mozilla/5.0 (X11; U; Linux x86_64; et; rv:1.9.1.7) Gecko/20100106 Ubuntu/9.10 (karmic) Firefox/3.5.7,gzip(gfe),gzip(gfe)" "www.eurovoting.com"
1.I 01-19 11:55AM 08.282
com.sun.faces.config.ConfigureListener contextInitialized: Initializing Mojarra 2.0.0 (RC2 b22) for context ''
1.I 01-19 11:55AM 08.313
com.sun.faces.config.ConfigManager initialize: Unsanitized stacktrace from failed start...
java.security.AccessControlException: access denied (java.lang.RuntimePermission modifyThreadGroup)
        at java.security.AccessControlContext.checkPermission(AccessControlContext.java:355)
        at java.security.AccessController.checkPermission(AccessController.java:567)
        at java.lang.SecurityManager.checkPermission(Unknown Source)
        at com.google.apphosting.runtime.security.CustomSecurityManager.checkPermission(CustomSecurityManager.java:45)
        at com.google.apphosting.runtime.security.CustomSecurityManager.checkAccess(CustomSecurityManager.java:93)
        at java.lang.ThreadGroup.checkAccess(Unknown Source)
        at java.lang.Thread.init(Unknown Source)
        at java.lang.Thread.(Unknown Source)
        at java.util.concurrent.Executors$DefaultThreadFactory.newThread(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor.addThread(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor.addIfUnderCorePoolSize(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor.execute(Unknown Source)
        at com.sun.faces.config.ConfigManager.getConfigDocuments(ConfigManager.java:637)
        at com.sun.faces.config.ConfigManager.initialize(ConfigManager.java:306)
        at com.sun.faces.config.ConfigureListener.contextInitialized(ConfigureListener.java:219)
        at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:530)
        at org.mortbay.jetty.servlet.Context.startContext(Context.java:135)
        at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1218)
        at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:500)
        at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:448)
        at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:40)
        at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.createHandler(AppVersionHandlerMap.java:191)
        at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.getHandler(AppVersionHandlerMap.java:168)
        at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:123)
        at com.google.apphosting.runtime.JavaRuntime.handleRequest(JavaRuntime.java:235)
        at com.google.apphosting.base.RuntimePb$EvaluationRuntime$6.handleBlockingRequest(RuntimePb.java:5235)
        at com.google.apphosting.base.RuntimePb$EvaluationRuntime$6.handleBlockingRequest(RuntimePb.java:5233)
        at com.google.net.rpc.impl.BlockingApplicationHandler.handleRequest(BlockingApplicationHandler.java:24)
        at com.google.net.rpc.impl.RpcUtil.runRpcInApplication(RpcUtil.java:363)
        at com.google.net.rpc.impl.Server$2.run(Server.java:838)
        at com.google.tracing.LocalTraceSpanRunnable.run(LocalTraceSpanRunnable.java:56)
        at com.google.tracing.LocalTraceSpanBuilder.internalContinueSpan(LocalTraceSpanBuilder.java:536)
        at com.google.net.rpc.impl.Server.startRpc(Server.java:793)
        at com.google.net.rpc.impl.Server.processRequest(Server.java:368)
        at com.google.net.rpc.impl.ServerConnection.messageReceived(ServerConnection.java:448)
        at com.google.net.rpc.impl.RpcConnection.parseMessages(RpcConnection.java:319)
        at com.google.net.rpc.impl.RpcConnection.dataReceived(RpcConnection.java:290)
        at com.google.net.async.Connection.handleReadEvent(Connection.java:466)
        at com.google.net.async.EventDispatcher.processNetworkEvents(EventDispatcher.java:759)
        at com.google.net.async.EventDispatcher.internalLoop(EventDispatcher.java:205)
        at com.google.net.async.EventDispatcher.loop(EventDispatcher.java:101)
        at com.google.net.rpc.RpcService.runUntilServerShutdown(RpcService.java:251)
        at com.google.apphosting.runtime.JavaRuntime$RpcRunnable.run(JavaRuntime.java:394)
        at java.lang.Thread.run(Unknown Source)
1.W 01-19 11:55AM 08.321
Failed startup of context com.google.apphosting.utils.jetty.RuntimeAppEngineWebAppContext@2b1682{/,/base/data/home/apps/eurovisionvoting/1.339283857273534740}
java.security.AccessControlException: access denied (java.lang.RuntimePermission modifyThread)
        at java.security.AccessControlContext.checkPermission(AccessControlContext.java:355)
        at java.security.AccessController.checkPermission(AccessController.java:567)
        at java.lang.SecurityManager.checkPermission(Unknown Source)
        at com.google.apphosting.runtime.security.CustomSecurityManager.checkPermission(CustomSecurityManager.java:45)
        at java.util.concurrent.ThreadPoolExecutor.shutdown(Unknown Source)
        at com.sun.faces.config.ConfigManager.initialize(ConfigManager.java:358)
        at com.sun.faces.config.ConfigureListener.contextInitialized(ConfigureListener.java:219)
        at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:530)
        at org.mortbay.jetty.servlet.Context.startContext(Context.java:135)
        at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1218)
        at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:500)
        at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:448)
        at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:40)
        at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.createHandler(AppVersionHandlerMap.java:191)
        at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.getHandler(AppVersionHandlerMap.java:168)
        at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:123)
        at com.google.apphosting.runtime.JavaRuntime.handleRequest(JavaRuntime.java:235)
        at com.google.apphosting.base.RuntimePb$EvaluationRuntime$6.handleBlockingRequest(RuntimePb.java:5235)
        at com.google.apphosting.base.RuntimePb$EvaluationRuntime$6.handleBlockingRequest(RuntimePb.java:5233)
        at com.google.net.rpc.impl.BlockingApplicationHandler.handleRequest(BlockingApplicationHandler.java:24)
        at com.google.net.rpc.impl.RpcUtil.runRpcInApplication(RpcUtil.java:363)
        at com.google.net.rpc.impl.Server$2.run(Server.java:838)
        at com.google.tracing.LocalTraceSpanRunnable.run(LocalTraceSpanRunnable.java:56)
        at com.google.tracing.LocalTraceSpanBuilder.internalContinueSpan(LocalTraceSpanBuilder.java:536)
        at com.google.net.rpc.impl.Server.startRpc(Server.java:793)
        at com.google.net.rpc.impl.Server.processRequest(Server.java:368)
        at com.google.net.rpc.impl.ServerConnection.messageReceived(ServerConnection.java:448)
        at com.google.net.rpc.impl.RpcConnection.parseMessages(RpcConnection.java:319)
        at com.google.net.rpc.impl.RpcConnection.dataReceived(RpcConnection.java:290)
        at com.google.net.async.Connection.handleReadEvent(Connection.java:466)
        at com.google.net.async.EventDispatcher.processNetworkEvents(EventDispatcher.java:759)
        at com.google.net.async.EventDispatcher.internalLoop(EventDispatcher.java:205)
        at com.google.net.async.EventDispatcher.loop(EventDispatcher.java:101)
        at com.google.net.rpc.RpcService.runUntilServerShutdown(RpcService.java:251)
        at com.google.apphosting.runtime.JavaRuntime$RpcRunnable.run(JavaRuntime.java:394)
        at java.lang.Thread.run(Unknown Source)
1.C 01-19 11:55AM 08.328
Uncaught exception from servlet
javax.servlet.UnavailableException: Initialization failed.
        at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.createHandler(AppVersionHandlerMap.java:200)
        at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.getHandler(AppVersionHandlerMap.java:168)
        at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:123)
        at com.google.apphosting.runtime.JavaRuntime.handleRequest(JavaRuntime.java:235)
        at com.google.apphosting.base.RuntimePb$EvaluationRuntime$6.handleBlockingRequest(RuntimePb.java:5235)
        at com.google.apphosting.base.RuntimePb$EvaluationRuntime$6.handleBlockingRequest(RuntimePb.java:5233)
        at com.google.net.rpc.impl.BlockingApplicationHandler.handleRequest(BlockingApplicationHandler.java:24)
        at com.google.net.rpc.impl.RpcUtil.runRpcInApplication(RpcUtil.java:363)
        at com.google.net.rpc.impl.Server$2.run(Server.java:838)
        at com.google.tracing.LocalTraceSpanRunnable.run(LocalTraceSpanRunnable.java:56)
        at com.google.tracing.LocalTraceSpanBuilder.internalContinueSpan(LocalTraceSpanBuilder.java:536)
        at com.google.net.rpc.impl.Server.startRpc(Server.java:793)
        at com.google.net.rpc.impl.Server.processRequest(Server.java:368)
        at com.google.net.rpc.impl.ServerConnection.messageReceived(ServerConnection.java:448)
        at com.google.net.rpc.impl.RpcConnection.parseMessages(RpcConnection.java:319)
        at com.google.net.rpc.impl.RpcConnection.dataReceived(RpcConnection.java:290)
        at com.google.net.async.Connection.handleReadEvent(Connection.java:466)
        at com.google.net.async.EventDispatcher.processNetworkEvents(EventDispatcher.java:759)
        at com.google.net.async.EventDispatcher.internalLoop(EventDispatcher.java:205)
        at com.google.net.async.EventDispatcher.loop(EventDispatcher.java:101)
        at com.google.net.rpc.RpcService.runUntilServerShutdown(RpcService.java:251)
        at com.google.apphosting.runtime.JavaRuntime$RpcRunnable.run(JavaRuntime.java:394)
        at java.lang.Thread.run(Unknown Source)

<context-param>
 <param-name>com.sun.faces.enableThreading</param-name>
 <param-value>false</param-value>
 </context-param>

This problem is actually simple, appengine has its own ways of scaling your application and creating threads. To fix the issue just add following to your web.xml
Bit bigger problems is that when you upload and try again then nothing changes. Just check administration > Versions to see if you have latest version as default.