GWT-RPC Call timing out

[harjit.singh]

Hi there,

I have bunch of data to read from the DataStore when a user clicks a
button. When I'm trying to read the data on the click handler via the
GWT RPC call, I get an timeout error . Any pointers as to how to
handle this type of situation would be appreciated. Here is the stack
trace of the error

#

69.140.89.63 - - [07/Jun/2009:13:40:36 -0700] "POST /datagov/greet
HTTP/1.1" 500 0 "http://1.latest.proxtox.appspot.com/datagov/
0E3CAA5EB66CC2D59C5C6A4CCA8A9588.cache.html" "Mozilla/5.0 (Windows; U;
Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/
3.0.10,gzip(gfe)" "1.latest.proxtox.appspot.com"

#
W 06-07 01:40PM 36.830

Error for /datagov/greet
com.google.apphosting.runtime.HardDeadlineExceededError: This request
(61b478bad38dde17) started at 2009/06/07 20:40:07.946 UTC and was
still executing at 2009/06/07 20:40:36.821 UTC.
at sun.misc.Unsafe.park(Native Method)
at java.util.concurrent.locks.LockSupport.parkNanos(Unknown
Source)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireSharedNanos
(Unknown Source)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.tryAcquireSharedNanos
(Unknown Source)
at java.util.concurrent.CountDownLatch.await(Unknown Source)
at com.google.net.rpc.util.RpcWaiter.waitForRpcsToFinish
(RpcWaiter.java:96)
at com.google.apphosting.runtime.ApiProxyImpl.doSyncCall
(ApiProxyImpl.java:81)
at com.google.apphosting.runtime.ApiProxyImpl.makeSyncCall
(ApiProxyImpl.java:54)
at com.google.apphosting.runtime.ApiProxyImpl.makeSyncCall
(ApiProxyImpl.java:32)
at com.google.apphosting.api.ApiProxy.makeSyncCall
(ApiProxy.java:72)
at
com.google.appengine.api.datastore.DatastoreApiHelper.makeSyncCall
(DatastoreApiHelper.java:47)
at com.google.appengine.api.datastore.DatastoreServiceImpl
$2.run
(DatastoreServiceImpl.java:169)
at
com.google.appengine.api.datastore.TransactionRunner.runInTransaction
(TransactionRunner.java:29)
at com.google.appengine.api.datastore.DatastoreServiceImpl.put
(DatastoreServiceImpl.java:157)
at com.google.appengine.api.datastore.DatastoreServiceImpl.put
(DatastoreServiceImpl.java:137)
at com.google.appengine.api.datastore.DatastoreServiceImpl.put
(DatastoreServiceImpl.java:129)
at
org.datanucleus.store.appengine.RuntimeExceptionWrappingDatastoreService.put
(RuntimeExceptionWrappingDatastoreService.java:92)
at
org.datanucleus.store.appengine.DatastorePersistenceHandler.put
(DatastorePersistenceHandler.java:108)
at
org.datanucleus.store.appengine.DatastorePersistenceHandler.put
(DatastorePersistenceHandler.java:94)
at
org.datanucleus.store.appengine.DatastorePersistenceHandler.insertObject
(DatastorePersistenceHandler.java:195)
at
org.datanucleus.state.JDOStateManagerImpl.internalMakePersistent
(JDOStateManagerImpl.java:3067)
at org.datanucleus.state.JDOStateManagerImpl.makePersistent
(JDOStateManagerImpl.java:3043)
at org.datanucleus.ObjectManagerImpl.persistObjectInternal
(ObjectManagerImpl.java:1258)
at org.datanucleus.ObjectManagerImpl.persistObject
(ObjectManagerImpl.java:1135)
at org.datanucleus.jdo.JDOPersistenceManager.jdoMakePersistent
(JDOPersistenceManager.java:668)
at org.datanucleus.jdo.JDOPersistenceManager.makePersistent
(JDOPersistenceManager.java:693)
at
com.mycompany.sampleProject.server.ReadEPAData.saveToDataStore
(ReadEPAData.java:67)
at
com.mycompany.sampleProject.server.ReadEPAData.readFileDataAndLoad
(ReadEPAData.java:52)
at
com.mycompany.sampleProject.server.GreetingServiceImpl.greetServer
(GreetingServiceImpl.java:26)
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)
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
$RequestHandler.headerComplete
(HttpConnection.java:830)
at
com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable
(RpcRequestParser.java:76)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:
381)
at
com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest
(JettyServletEngineAdapter.java:125)
at com.google.apphosting.runtime.JavaRuntime.handleRequest
(JavaRuntime.java:235)
at com.google.apphosting.base.RuntimePb$EvaluationRuntime
$6.handleBlockingRequest(RuntimePb.java:4755)
at com.google.apphosting.base.RuntimePb$EvaluationRuntime
$6.handleBlockingRequest(RuntimePb.java:4753)
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$2.run(Server.java:800)
at com.google.tracing.LocalTraceSpanRunnable.run
(LocalTraceSpanRunnable.java:56)
at
com.google.tracing.LocalTraceSpanBuilder.internalContinueSpan
(LocalTraceSpanBuilder.java:510)
at com.google.net.rpc.impl.Server.startRpc(Server.java:756)
at com.google.net.rpc.impl.Server.processRequest(Server.java:
348)
at com.google.net.rpc.impl.ServerConnection.messageReceived
(ServerConnection.java:459)
at com.google.net.rpc.impl.RpcConnection.parseMessages
(RpcConnection.java:319)
at com.google.net.rpc.impl.RpcConnection.dataReceived
(RpcConnection.java:290)
at com.google.net.async.Connection.handleReadEvent
(Connection.java:
419)
at com.google.net.async.EventDispatcher.processNetworkEvents
(EventDispatcher.java:762)
at com.google.net.async.EventDispatcher.internalLoop
(EventDispatcher.java:207)
at com.google.net.async.EventDispatcher.loop
(EventDispatcher.java:
101)
at com.google.net.rpc.RpcService.runUntilServerShutdown
(RpcService.java:251)
at com.google.apphosting.runtime.JavaRuntime$RpcRunnable.run
(JavaRuntime.java:373)
at java.lang.Thread.run(Unknown Source)

Thanks

- Harjit