All I'm doing is persisting an entity in the datastore. No biggie. And now I get this super weird error. What is the deal here?
I have no idea how to fix this, especially when the stack trace says that some code is calling some code "which should be impossible." Has anyone run into this problem and / or know how to fix? The culprit code: Message message = new Message(); message.setActionPlan(actionPlan.getKey()); message.setBody(new Text(body)); message.setCoach(actionPlan.getActionPlanScript()); message.setCoachName(actionPlanScript.getName()); message.setMedium(Notifications.Medium.ANDROID); message.setSubject(subject); message.setUser(user.getId()); messageManager.saveMessage(message); Here's the stack trace: javax.servlet.ServletContext log: Exception while dispatching incoming RPC call com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public abstract java.lang.String com.todoroo.client.ActionPlanScriptUploadService.uploadActionPlanScript (java.lang.Long,java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String)' threw an unexpected exception: org.mozilla.javascript.WrappedException: Wrapped javax.persistence.PersistenceException: Somehow org.datanucleus.sco.UnsetOwners.storeStringField() was called, which should have been impossible (SimpleShort#5) at com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure (RPC.java:360) at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse (RPC.java:546) at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall (RemoteServiceServlet.java:166) at com.google.gwt.user.server.rpc.RemoteServiceServlet.doPost (RemoteServiceServlet.java:86) 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$CachedChain.doFilter (ServletHandler.java:1084) at org.mortbay.jetty.servlet.ServletHandler.handle (ServletHandler.java:360) at org.mortbay.jetty.security.SecurityHandler.handle (SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle (SessionHandler.java:181) at org.mortbay.jetty.handler.ContextHandler.handle (ContextHandler.java:712) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java: 405) at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle (AppVersionHandlerMap.java:237) at org.mortbay.jetty.handler.HandlerWrapper.handle (HandlerWrapper.java:139) at org.mortbay.jetty.Server.handle(Server.java:313) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java: 506) at org.mortbay.jetty.HttpConnection$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:235) at com.google.apphosting.base.RuntimePb$EvaluationRuntime $6.handleBlockingRequest(RuntimePb.java:4823) at com.google.apphosting.base.RuntimePb$EvaluationRuntime $6.handleBlockingRequest(RuntimePb.java:4821) at com.google.net.rpc.impl.BlockingApplicationHandler.handleRequest (BlockingApplicationHandler.java:24) at com.google.net.rpc.impl.RpcUtil.runRpcInApplication(RpcUtil.java: 359) at com.google.net.rpc.impl.Server$2.run(Server.java:820) at com.google.tracing.LocalTraceSpanRunnable.run (LocalTraceSpanRunnable.java:56) at com.google.tracing.LocalTraceSpanBuilder.internalContinueSpan (LocalTraceSpanBuilder.java:516) at com.google.net.rpc.impl.Server.startRpc(Server.java:775) at com.google.net.rpc.impl.Server.processRequest(Server.java:348) at com.google.net.rpc.impl.ServerConnection.messageReceived (ServerConnection.java:436) at com.google.net.rpc.impl.RpcConnection.parseMessages (RpcConnection.java:319) at com.google.net.rpc.impl.RpcConnection.dataReceived (RpcConnection.java:290) at com.google.net.async.Connection.handleReadEvent(Connection.java: 428) at com.google.net.async.EventDispatcher.processNetworkEvents (EventDispatcher.java:762) at com.google.net.async.EventDispatcher.internalLoop (EventDispatcher.java:207) at com.google.net.async.EventDispatcher.loop(EventDispatcher.java: 101) at com.google.net.rpc.RpcService.runUntilServerShutdown (RpcService.java:251) at com.google.apphosting.runtime.JavaRuntime$RpcRunnable.run (JavaRuntime.java:374) at java.lang.Thread.run(Unknown Source) Caused by: org.mozilla.javascript.WrappedException: Wrapped javax.persistence.PersistenceException: Somehow org.datanucleus.sco.UnsetOwners.storeStringField() was called, which should have been impossible (SimpleShort#5) at org.mozilla.javascript.Context.throwAsScriptRuntimeEx(Context.java: 1782) at org.mozilla.javascript.MemberBox.invoke(MemberBox.java:183) at org.mozilla.javascript.NativeJavaMethod.call(NativeJavaMethod.java: 247) at org.mozilla.javascript.optimizer.OptRuntime.call2(OptRuntime.java: 76) at org.mozilla.javascript.gen.SimpleShort_2._c_anonymous_2 (SimpleShort:5) at org.mozilla.javascript.gen.SimpleShort_2.call(SimpleShort) at org.mozilla.javascript.ContextFactory.doTopCall (ContextFactory.java:426) at org.mozilla.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java: 3092) at org.mozilla.javascript.gen.SimpleShort_2.call(SimpleShort) at com.todoroo.service.impl.JavaScriptManagerImpl.callActionPlanFn (JavaScriptManagerImpl.java:201) at com.todoroo.service.impl.JavaScriptManagerImpl.callActionPlanTransitionFn (JavaScriptManagerImpl.java:162) at com.todoroo.service.impl.JavaScriptManagerImpl.callActionPlanForFirstTime (JavaScriptManagerImpl.java:155) at com.todoroo.server.ActionPlanScriptUploadServiceImpl.uploadActionPlanScript (ActionPlanScriptUploadServiceImpl.java:80) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at com.google.apphosting.runtime.security.shared.intercept.java.lang.reflect.Method_ $3.run(Method_.java:149) at java.security.AccessController.doPrivileged(Native Method) at com.google.apphosting.runtime.security.shared.intercept.java.lang.reflect.Method_.privilegedInvoke (Method_.java:147) at com.google.apphosting.runtime.security.shared.intercept.java.lang.reflect.Method_.invoke (Method_.java:120) at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse (RPC.java:527) ... 43 more Caused by: javax.persistence.PersistenceException: Somehow org.datanucleus.sco.UnsetOwners.storeStringField() was called, which should have been impossible at org.datanucleus.jpa.NucleusJPAHelper.getJPAExceptionForJDOException (NucleusJPAHelper.java:214) at org.datanucleus.jpa.EntityManagerImpl.close(EntityManagerImpl.java: 157) at org.datanucleus.store.appengine.jpa.DatastoreEntityManager.close (DatastoreEntityManager.java:54) at com.todoroo.dao.impl.GenericDaoImpl.makePersistent (GenericDaoImpl.java:173) at com.todoroo.dao.impl.GenericDaoImpl.makePersistent (GenericDaoImpl.java:181) at com.todoroo.service.impl.MessageManagerImpl.saveMessage (MessageManagerImpl.java:44) at com.todoroo.service.impl.JavaScriptManagerImpl.createShortNotification (JavaScriptManagerImpl.java:600) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at com.google.apphosting.runtime.security.shared.intercept.java.lang.reflect.Method_ $3.run(Method_.java:149) at java.security.AccessController.doPrivileged(Native Method) at com.google.apphosting.runtime.security.shared.intercept.java.lang.reflect.Method_.privilegedInvoke (Method_.java:147) at com.google.apphosting.runtime.security.shared.intercept.java.lang.reflect.Method_.invoke (Method_.java:120) at org.mozilla.javascript.MemberBox.invoke(MemberBox.java:161) ... 63 more Caused by: org.datanucleus.exceptions.NucleusException: Somehow org.datanucleus.sco.UnsetOwners.storeStringField() was called, which should have been impossible at org.datanucleus.store.fieldmanager.AbstractFieldManager.storeStringField (AbstractFieldManager.java:123) at org.datanucleus.state.AbstractStateManager.providedStringFie... 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