Hi all,
While executing a server method which talks to another system and
get details from there, I get a DeadlineExceededException at the appengine.
I don't have much control on the time taken by the other system. I just call
a method from an interface of that system and wait for the response. What is
the best practice in these situations? Below are the exceptions that I got
at server.
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.sanchu.clicks.client.GreetingService.greetServer(java.lang.String)'
threw an unexpected exception:
com.google.apphosting.api.DeadlineExceededException: This request
(e737f449255620d0) started at 2009/10/29 18:30:43.480 UTC and was
still executing at 2009/10/29 18:31:12.207 UTC.
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$CachedChain.doFilter(ServletHandler.java:1084)
at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:360)
at
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:712)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
at
com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:238)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
at org.mortbay.jetty.Server.handle(Server.java:313)
at
org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:506)
at
org.mortbay.jetty.HttpConnection$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: com.google.apphosting.api.DeadlineExceededException: This
request (e737f449255620d0) started at 2009/10/29 18:30:43.480 UTC and
was still executing at 2009/10/29 18:31:12.207 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.api.ApiProxy.makeSyncCall(ApiProxy.java:79)
at
com.google.appengine.api.urlfetch.URLFetchServiceImpl.fetch(URLFetchServiceImpl.java:40)
at com.aetrion.flickr.REST.get(REST.java:142)
at
com.aetrion.flickr.photosets.PhotosetsInterface.getPhotos(PhotosetsInterface.java:435)
at
com.aetrion.flickr.photosets.PhotosetsInterface.getPhotos(PhotosetsInterface.java:479)
at
com.sanchu.clicks.flickr.FlickrQuery.getAllPhotos(FlickrQuery.java:98)
at com.sanchu.clicks.datastore.LoadData.loadAllPhotos(LoadData.java:29)
at
com.sanchu.clicks.server.GreetingServiceImpl.greetServer(GreetingServiceImpl.java:18)
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(Method.java:40)
at
com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:527)
... 43 more
-Sanjith.
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