I'm trying to use deRPC of GWT 2.0 RC1 on App Engine and i'm getting
the following exception. Is this because sun.misc.Unsafe is
unavailable on App Engine (i'm not sure it isn't, but it seems
possible)? Seems strange that GWT 2.0 RPC would not work on App
Engine. Did i fail to configure something correctly or is this an
intended incompatibility with App Engine?
javax.servlet.ServletContext log: Exception while dispatching incoming
RPC call
java.lang.ExceptionInInitializerError
at com.google.gwt.rpc.server.RPC.decodeRequest(RPC.java:158)
at com.google.gwt.rpc.server.RpcServlet.processCall(RpcServlet.java:
141)
at com.google.gwt.rpc.server.RpcServlet.processPost(RpcServlet.java:
203)
at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost
(AbstractRemoteServiceServlet.java:62)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:713)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:806)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:
487)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter
(ServletHandler.java:1093)
at com.google.apphosting.runtime.jetty.SaveSessionFilter.doFilter
(SaveSessionFilter.java:35)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter
(ServletHandler.java:1084)
at
com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter
(TransactionCleanupFilter.java:43)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter
(ServletHandler.java:1084)
at org.mortbay.jetty.servlet.ServletHandler.handle
(ServletHandler.java:360)
at org.mortbay.jetty.security.SecurityHandler.handle
(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle
(SessionHandler.java:181)
at org.mortbay.jetty.handler.ContextHandler.handle
(ContextHandler.java:712)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:
405)
at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle
(AppVersionHandlerMap.java:238)
at org.mortbay.jetty.handler.HandlerWrapper.handle
(HandlerWrapper.java:139)
at org.mortbay.jetty.Server.handle(Server.java:313)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:
506)
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete
(HttpConnection.java:830)
at com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable
(RpcRequestParser.java:76)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:381)
at
com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest
(JettyServletEngineAdapter.java:139)
at com.google.apphosting.runtime.JavaRuntime.handleRequest
(JavaRuntime.java:239)
at com.google.apphosting.base.RuntimePb$EvaluationRuntime
$6.handleBlockingRequest(RuntimePb.java:5135)
at com.google.apphosting.base.RuntimePb$EvaluationRuntime
$6.handleBlockingRequest(RuntimePb.java:5133)
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$2.run(Server.java:814)
at com.google.tracing.LocalTraceSpanRunnable.run
(LocalTraceSpanRunnable.java:56)
at com.google.tracing.LocalTraceSpanBuilder.internalContinueSpan
(LocalTraceSpanBuilder.java:516)
at com.google.net.rpc.impl.Server.startRpc(Server.java:769)
at com.google.net.rpc.impl.Server.processRequest(Server.java:351)
at com.google.net.rpc.impl.ServerConnection.messageReceived
(ServerConnection.java:437)
at com.google.net.rpc.impl.RpcConnection.parseMessages
(RpcConnection.java:319)
at com.google.net.rpc.impl.RpcConnection.dataReceived
(RpcConnection.java:290)
at com.google.net.async.Connection.handleReadEvent(Connection.java:
436)
at com.google.net.async.EventDispatcher.processNetworkEvents
(EventDispatcher.java:762)
at com.google.net.async.EventDispatcher.internalLoop
(EventDispatcher.java:207)
at com.google.net.async.EventDispatcher.loop(EventDispatcher.java:
101)
at com.google.net.rpc.RpcService.runUntilServerShutdown
(RpcService.java:251)
at com.google.apphosting.runtime.JavaRuntime$RpcRunnable.run
(JavaRuntime.java:396)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.RuntimeException: Unable to get Unsafe instance
at com.google.gwt.rpc.server.CommandSerializationUtil.<clinit>
(CommandSerializationUtil.java:443)
... 45 more
Caused by: java.lang.NoSuchFieldException: theUnsafe
at com.google.appengine.runtime.Request.process-c17519ba124c1455
(Request.java)
at java.lang.Class.getDeclaredField(Class.java:158)
at com.google.gwt.rpc.server.CommandSerializationUtil.<clinit>
(CommandSerializationUtil.java:430)
... 45 more
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