i was seeing a crap-ton of deadline exceeded exceptions on starmakerapp from about 9:30-10:00am PDT today. the exceptions were on datastore put calls, and caused instance thrashing (my average instance life was under 1 minute) and made my app unresponsive returning 500 errors to my users.
yup, i'm on master slave datastore. i'm still waiting for a response to http://code.google.com/p/googleappengine/issues/detail?id=7434 before i migrate. On Tuesday, June 5, 2012 10:03:15 AM UTC-7, aramanuj wrote: > > > 1. > > Hi, > > We are seeing several > "com.google.apphosting.api.ApiProxy$CancelledException: The API call > datastore_v3.Put() was explicitly cancelled." exceptions on any page trying > to access the datastore (at around 10:00am PDT). This is the first time we've > observed this on our application (samaanguru). It is using the master-slave > datastore. Clearly, the datastore writes are not happening. Can anyone throw > light on what's happening? > > The stack-trace is as below. > > Thanks, > Arun > > > com.google.apphosting.api.ApiProxy$CancelledException: The API call > datastore_v3.Put() was explicitly cancelled. > at > com.google.apphosting.runtime.ApiProxyImpl$5.get(ApiProxyImpl.java:361) > at > com.google.apphosting.runtime.ApiProxyImpl$5.get(ApiProxyImpl.java:359) > at > com.google.appengine.api.utils.FutureWrapper.get(FutureWrapper.java:90) > at > com.google.appengine.api.datastore.FutureHelper$CumulativeAggregateFuture.get(FutureHelper.java:145) > at > com.google.appengine.api.utils.FutureWrapper.get(FutureWrapper.java:90) > at > com.google.appengine.api.datastore.FutureHelper.getInternal(FutureHelper.java:72) > at > com.google.appengine.api.datastore.FutureHelper.quietGet(FutureHelper.java:33) > at > com.google.appengine.api.datastore.DatastoreServiceImpl$2.runInternal(DatastoreServiceImpl.java:113) > at > com.google.appengine.api.datastore.DatastoreServiceImpl$2.runInternal(DatastoreServiceImpl.java:110) > at > com.google.appengine.api.datastore.TransactionRunner.runInTransaction(TransactionRunner.java:31) > at > com.google.appengine.api.datastore.DatastoreServiceImpl.put(DatastoreServiceImpl.java:110) > at > com.google.appengine.api.datastore.DatastoreServiceImpl.put(DatastoreServiceImpl.java:94) > at > com.google.apphosting.runtime.jetty.DatastoreSessionStore.saveSession(DatastoreSessionStore.java:93) > at > com.google.apphosting.runtime.jetty.SessionManager$AppEngineSession.save(SessionManager.java:164) > at > com.google.apphosting.runtime.jetty.SaveSessionFilter.doFilter(SaveSessionFilter.java:41) > at > org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) > at > com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43) > at > org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) > at > org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388) > at > org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) > at > org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) > at > org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) > at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) > at > com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:249) > at > org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) > at org.mortbay.jetty.Server.handle(Server.java:326) > at > org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) > at > org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923) > at > com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable(RpcRequestParser.java:76) > at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) > at > com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:135) > at > com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run(JavaRuntime.java:477) > at > com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:449) > at > com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:455) > at com.google.tracing.TraceContext.runInContext(TraceContext.java:695) > at > com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:333) > at > com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:325) > at > com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:453) > at > com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:251) > at java.lang.Thread.run(Thread.java:679) > > 2. W > > -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To view this discussion on the web visit https://groups.google.com/d/msg/google-appengine/-/dAH2BYYM9IMJ. To post to this group, send email to google-appengine@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
