public virtual void TestResourceOverCommit() { MockRM rm = new MockRM(conf); rm.Start(); MockNM nm1 = rm.RegisterNode("127.0.0.1:1234", 4 * Gb); RMApp app1 = rm.SubmitApp(2048); // kick the scheduling, 2 GB given to AM1, remaining 2GB on nm1 nm1.NodeHeartbeat(true); RMAppAttempt attempt1 = app1.GetCurrentAppAttempt(); MockAM am1 = rm.SendAMLaunched(attempt1.GetAppAttemptId()); am1.RegisterAppAttempt(); SchedulerNodeReport report_nm1 = rm.GetResourceScheduler().GetNodeReport(nm1.GetNodeId ()); // check node report, 2 GB used and 2 GB available NUnit.Framework.Assert.AreEqual(2 * Gb, report_nm1.GetUsedResource().GetMemory()); NUnit.Framework.Assert.AreEqual(2 * Gb, report_nm1.GetAvailableResource().GetMemory ()); // add request for containers am1.AddRequests(new string[] { "127.0.0.1", "127.0.0.2" }, 2 * Gb, 1, 1); AllocateResponse alloc1Response = am1.Schedule(); // send the request // kick the scheduler, 2 GB given to AM1, resource remaining 0 nm1.NodeHeartbeat(true); while (alloc1Response.GetAllocatedContainers().Count < 1) { Log.Info("Waiting for containers to be created for app 1..."); Sharpen.Thread.Sleep(1000); alloc1Response = am1.Schedule(); } IList <Container> allocated1 = alloc1Response.GetAllocatedContainers(); NUnit.Framework.Assert.AreEqual(1, allocated1.Count); NUnit.Framework.Assert.AreEqual(2 * Gb, allocated1[0].GetResource().GetMemory()); NUnit.Framework.Assert.AreEqual(nm1.GetNodeId(), allocated1[0].GetNodeId()); report_nm1 = rm.GetResourceScheduler().GetNodeReport(nm1.GetNodeId()); // check node report, 4 GB used and 0 GB available NUnit.Framework.Assert.AreEqual(0, report_nm1.GetAvailableResource().GetMemory()); NUnit.Framework.Assert.AreEqual(4 * Gb, report_nm1.GetUsedResource().GetMemory()); // check container is assigned with 2 GB. Container c1 = allocated1[0]; NUnit.Framework.Assert.AreEqual(2 * Gb, c1.GetResource().GetMemory()); // update node resource to 2 GB, so resource is over-consumed. IDictionary <NodeId, ResourceOption> nodeResourceMap = new Dictionary <NodeId, ResourceOption >(); nodeResourceMap[nm1.GetNodeId()] = ResourceOption.NewInstance(Org.Apache.Hadoop.Yarn.Api.Records.Resource .NewInstance(2 * Gb, 1), -1); UpdateNodeResourceRequest request = UpdateNodeResourceRequest.NewInstance(nodeResourceMap ); AdminService @as = rm.adminService; @as.UpdateNodeResource(request); // Now, the used resource is still 4 GB, and available resource is minus value. report_nm1 = rm.GetResourceScheduler().GetNodeReport(nm1.GetNodeId()); NUnit.Framework.Assert.AreEqual(4 * Gb, report_nm1.GetUsedResource().GetMemory()); NUnit.Framework.Assert.AreEqual(-2 * Gb, report_nm1.GetAvailableResource().GetMemory ()); // Check container can complete successfully in case of resource over-commitment. ContainerStatus containerStatus = BuilderUtils.NewContainerStatus(c1.GetId(), ContainerState .Complete, string.Empty, 0); nm1.ContainerStatus(containerStatus); int waitCount = 0; while (attempt1.GetJustFinishedContainers().Count < 1 && waitCount++ != 20) { Log.Info("Waiting for containers to be finished for app 1... Tried " + waitCount + " times already.."); Sharpen.Thread.Sleep(100); } NUnit.Framework.Assert.AreEqual(1, attempt1.GetJustFinishedContainers().Count); NUnit.Framework.Assert.AreEqual(1, am1.Schedule().GetCompletedContainersStatuses( ).Count); report_nm1 = rm.GetResourceScheduler().GetNodeReport(nm1.GetNodeId()); NUnit.Framework.Assert.AreEqual(2 * Gb, report_nm1.GetUsedResource().GetMemory()); // As container return 2 GB back, the available resource becomes 0 again. NUnit.Framework.Assert.AreEqual(0 * Gb, report_nm1.GetAvailableResource().GetMemory ()); rm.Stop(); }