// Test regular RM restart/failover, new RM should not count
// AM failure towards the max-retry-account and should be able to
// re-launch the AM.
/// <exception cref="System.Exception"/>
public virtual void TestRMRestartOrFailoverNotCountedForAMFailures()
{
YarnConfiguration conf = new YarnConfiguration();
conf.SetClass(YarnConfiguration.RmScheduler, typeof(CapacityScheduler), typeof(ResourceScheduler
));
conf.SetBoolean(YarnConfiguration.RecoveryEnabled, true);
conf.SetBoolean(YarnConfiguration.RmWorkPreservingRecoveryEnabled, false);
conf.Set(YarnConfiguration.RmStore, typeof(MemoryRMStateStore).FullName);
// explicitly set max-am-retry count as 1.
conf.SetInt(YarnConfiguration.RmAmMaxAttempts, 1);
MemoryRMStateStore memStore = new MemoryRMStateStore();
memStore.Init(conf);
MockRM rm1 = new MockRM(conf, memStore);
rm1.Start();
MockNM nm1 = new MockNM("127.0.0.1:1234", 8000, rm1.GetResourceTrackerService());
nm1.RegisterNode();
RMApp app1 = rm1.SubmitApp(200);
// AM should be restarted even though max-am-attempt is 1.
MockAM am1 = MockRM.LaunchAndRegisterAM(app1, rm1, nm1);
RMAppAttempt attempt1 = app1.GetCurrentAppAttempt();
NUnit.Framework.Assert.IsTrue(((RMAppAttemptImpl)attempt1).MayBeLastAttempt());
// Restart rm.
MockRM rm2 = new MockRM(conf, memStore);
rm2.Start();
ApplicationStateData appState = memStore.GetState().GetApplicationState()[app1.GetApplicationId
()];
// re-register the NM
nm1.SetResourceTrackerService(rm2.GetResourceTrackerService());
NMContainerStatus status = Org.Apache.Hadoop.Yarn.Util.Records.NewRecord <NMContainerStatus
>();
status.SetContainerExitStatus(ContainerExitStatus.KilledByResourcemanager);
status.SetContainerId(attempt1.GetMasterContainer().GetId());
status.SetContainerState(ContainerState.Complete);
status.SetDiagnostics(string.Empty);
nm1.RegisterNode(Sharpen.Collections.SingletonList(status), null);
rm2.WaitForState(attempt1.GetAppAttemptId(), RMAppAttemptState.Failed);
NUnit.Framework.Assert.AreEqual(ContainerExitStatus.KilledByResourcemanager, appState
.GetAttempt(am1.GetApplicationAttemptId()).GetAMContainerExitStatus());
// Will automatically start a new AppAttempt in rm2
rm2.WaitForState(app1.GetApplicationId(), RMAppState.Accepted);
MockAM am2 = rm2.WaitForNewAMToLaunchAndRegister(app1.GetApplicationId(), 2, nm1);
MockRM.FinishAMAndVerifyAppState(app1, rm2, nm1, am2);
RMAppAttempt attempt3 = rm2.GetRMContext().GetRMApps()[app1.GetApplicationId()].GetCurrentAppAttempt
();
NUnit.Framework.Assert.IsTrue(attempt3.ShouldCountTowardsMaxAttemptRetry());
NUnit.Framework.Assert.AreEqual(ContainerExitStatus.Invalid, appState.GetAttempt(
am2.GetApplicationAttemptId()).GetAMContainerExitStatus());
rm1.Stop();
rm2.Stop();
}
// Test RM restarts after AM container is preempted, new RM should not count
// AM preemption failure towards the max-retry-account and should be able to
// re-launch the AM.
/// <exception cref="System.Exception"/>
public virtual void TestPreemptedAMRestartOnRMRestart()
{
YarnConfiguration conf = new YarnConfiguration();
conf.SetClass(YarnConfiguration.RmScheduler, typeof(CapacityScheduler), typeof(ResourceScheduler
));
conf.SetBoolean(YarnConfiguration.RecoveryEnabled, true);
conf.SetBoolean(YarnConfiguration.RmWorkPreservingRecoveryEnabled, false);
conf.Set(YarnConfiguration.RmStore, typeof(MemoryRMStateStore).FullName);
// explicitly set max-am-retry count as 1.
conf.SetInt(YarnConfiguration.RmAmMaxAttempts, 1);
MemoryRMStateStore memStore = new MemoryRMStateStore();
memStore.Init(conf);
MockRM rm1 = new MockRM(conf, memStore);
rm1.Start();
MockNM nm1 = new MockNM("127.0.0.1:1234", 8000, rm1.GetResourceTrackerService());
nm1.RegisterNode();
RMApp app1 = rm1.SubmitApp(200);
RMAppAttempt attempt1 = app1.GetCurrentAppAttempt();
MockAM am1 = MockRM.LaunchAndRegisterAM(app1, rm1, nm1);
CapacityScheduler scheduler = (CapacityScheduler)rm1.GetResourceScheduler();
ContainerId amContainer = ContainerId.NewContainerId(am1.GetApplicationAttemptId(
), 1);
// Forcibly preempt the am container;
scheduler.KillContainer(scheduler.GetRMContainer(amContainer));
am1.WaitForState(RMAppAttemptState.Failed);
NUnit.Framework.Assert.IsTrue(!attempt1.ShouldCountTowardsMaxAttemptRetry());
rm1.WaitForState(app1.GetApplicationId(), RMAppState.Accepted);
// state store has 1 attempt stored.
ApplicationStateData appState = memStore.GetState().GetApplicationState()[app1.GetApplicationId
()];
NUnit.Framework.Assert.AreEqual(1, appState.GetAttemptCount());
// attempt stored has the preempted container exit status.
NUnit.Framework.Assert.AreEqual(ContainerExitStatus.Preempted, appState.GetAttempt
(am1.GetApplicationAttemptId()).GetAMContainerExitStatus());
// Restart rm.
MockRM rm2 = new MockRM(conf, memStore);
nm1.SetResourceTrackerService(rm2.GetResourceTrackerService());
nm1.RegisterNode();
rm2.Start();
// Restarted RM should re-launch the am.
MockAM am2 = rm2.WaitForNewAMToLaunchAndRegister(app1.GetApplicationId(), 2, nm1);
MockRM.FinishAMAndVerifyAppState(app1, rm2, nm1, am2);
RMAppAttempt attempt2 = rm2.GetRMContext().GetRMApps()[app1.GetApplicationId()].GetCurrentAppAttempt
();
NUnit.Framework.Assert.IsTrue(attempt2.ShouldCountTowardsMaxAttemptRetry());
NUnit.Framework.Assert.AreEqual(ContainerExitStatus.Invalid, appState.GetAttempt(
am2.GetApplicationAttemptId()).GetAMContainerExitStatus());
rm1.Stop();
rm2.Stop();
}
/// <exception cref="System.Exception"/>
public virtual void TestAMRestartWithExistingContainers()
{
YarnConfiguration conf = new YarnConfiguration();
conf.SetInt(YarnConfiguration.RmAmMaxAttempts, 2);
MockRM rm1 = new MockRM(conf);
rm1.Start();
RMApp app1 = rm1.SubmitApp(200, "name", "user", new Dictionary <ApplicationAccessType
, string>(), false, "default", -1, null, "MAPREDUCE", false, true);
MockNM nm1 = new MockNM("127.0.0.1:1234", 10240, rm1.GetResourceTrackerService());
nm1.RegisterNode();
MockNM nm2 = new MockNM("127.0.0.1:2351", 4089, rm1.GetResourceTrackerService());
nm2.RegisterNode();
MockAM am1 = MockRM.LaunchAndRegisterAM(app1, rm1, nm1);
int NumContainers = 3;
// allocate NUM_CONTAINERS containers
am1.Allocate("127.0.0.1", 1024, NumContainers, new AList <ContainerId>());
nm1.NodeHeartbeat(true);
// wait for containers to be allocated.
IList <Container> containers = am1.Allocate(new AList <ResourceRequest>(), new AList
<ContainerId>()).GetAllocatedContainers();
while (containers.Count != NumContainers)
{
nm1.NodeHeartbeat(true);
Sharpen.Collections.AddAll(containers, am1.Allocate(new AList <ResourceRequest>(),
new AList <ContainerId>()).GetAllocatedContainers());
Sharpen.Thread.Sleep(200);
}
// launch the 2nd container, for testing running container transferred.
nm1.NodeHeartbeat(am1.GetApplicationAttemptId(), 2, ContainerState.Running);
ContainerId containerId2 = ContainerId.NewContainerId(am1.GetApplicationAttemptId
(), 2);
rm1.WaitForState(nm1, containerId2, RMContainerState.Running);
// launch the 3rd container, for testing container allocated by previous
// attempt is completed by the next new attempt/
nm1.NodeHeartbeat(am1.GetApplicationAttemptId(), 3, ContainerState.Running);
ContainerId containerId3 = ContainerId.NewContainerId(am1.GetApplicationAttemptId
(), 3);
rm1.WaitForState(nm1, containerId3, RMContainerState.Running);
// 4th container still in AQUIRED state. for testing Acquired container is
// always killed.
ContainerId containerId4 = ContainerId.NewContainerId(am1.GetApplicationAttemptId
(), 4);
rm1.WaitForState(nm1, containerId4, RMContainerState.Acquired);
// 5th container is in Allocated state. for testing allocated container is
// always killed.
am1.Allocate("127.0.0.1", 1024, 1, new AList <ContainerId>());
nm1.NodeHeartbeat(true);
ContainerId containerId5 = ContainerId.NewContainerId(am1.GetApplicationAttemptId
(), 5);
rm1.WaitForContainerAllocated(nm1, containerId5);
rm1.WaitForState(nm1, containerId5, RMContainerState.Allocated);
// 6th container is in Reserved state.
am1.Allocate("127.0.0.1", 6000, 1, new AList <ContainerId>());
ContainerId containerId6 = ContainerId.NewContainerId(am1.GetApplicationAttemptId
(), 6);
nm1.NodeHeartbeat(true);
SchedulerApplicationAttempt schedulerAttempt = ((AbstractYarnScheduler)rm1.GetResourceScheduler
()).GetCurrentAttemptForContainer(containerId6);
while (schedulerAttempt.GetReservedContainers().IsEmpty())
{
System.Console.Out.WriteLine("Waiting for container " + containerId6 + " to be reserved."
);
nm1.NodeHeartbeat(true);
Sharpen.Thread.Sleep(200);
}
// assert containerId6 is reserved.
NUnit.Framework.Assert.AreEqual(containerId6, schedulerAttempt.GetReservedContainers
()[0].GetContainerId());
// fail the AM by sending CONTAINER_FINISHED event without registering.
nm1.NodeHeartbeat(am1.GetApplicationAttemptId(), 1, ContainerState.Complete);
am1.WaitForState(RMAppAttemptState.Failed);
// wait for some time. previous AM's running containers should still remain
// in scheduler even though am failed
Sharpen.Thread.Sleep(3000);
rm1.WaitForState(nm1, containerId2, RMContainerState.Running);
// acquired/allocated containers are cleaned up.
NUnit.Framework.Assert.IsNull(rm1.GetResourceScheduler().GetRMContainer(containerId4
));
NUnit.Framework.Assert.IsNull(rm1.GetResourceScheduler().GetRMContainer(containerId5
));
// wait for app to start a new attempt.
rm1.WaitForState(app1.GetApplicationId(), RMAppState.Accepted);
// assert this is a new AM.
ApplicationAttemptId newAttemptId = app1.GetCurrentAppAttempt().GetAppAttemptId();
NUnit.Framework.Assert.IsFalse(newAttemptId.Equals(am1.GetApplicationAttemptId())
);
// launch the new AM
RMAppAttempt attempt2 = app1.GetCurrentAppAttempt();
nm1.NodeHeartbeat(true);
MockAM am2 = rm1.SendAMLaunched(attempt2.GetAppAttemptId());
RegisterApplicationMasterResponse registerResponse = am2.RegisterAppAttempt();
// Assert two containers are running: container2 and container3;
NUnit.Framework.Assert.AreEqual(2, registerResponse.GetContainersFromPreviousAttempts
().Count);
bool containerId2Exists = false;
bool containerId3Exists = false;
foreach (Container container in registerResponse.GetContainersFromPreviousAttempts
())
{
if (container.GetId().Equals(containerId2))
{
containerId2Exists = true;
}
if (container.GetId().Equals(containerId3))
{
containerId3Exists = true;
}
}
NUnit.Framework.Assert.IsTrue(containerId2Exists && containerId3Exists);
rm1.WaitForState(app1.GetApplicationId(), RMAppState.Running);
// complete container by sending the container complete event which has earlier
// attempt's attemptId
nm1.NodeHeartbeat(am1.GetApplicationAttemptId(), 3, ContainerState.Complete);
// Even though the completed container containerId3 event was sent to the
// earlier failed attempt, new RMAppAttempt can also capture this container
// info.
// completed containerId4 is also transferred to the new attempt.
RMAppAttempt newAttempt = app1.GetRMAppAttempt(am2.GetApplicationAttemptId());
// 4 containers finished, acquired/allocated/reserved/completed.
WaitForContainersToFinish(4, newAttempt);
bool container3Exists = false;
bool container4Exists = false;
bool container5Exists = false;
bool container6Exists = false;
foreach (ContainerStatus status in newAttempt.GetJustFinishedContainers())
{
if (status.GetContainerId().Equals(containerId3))
{
// containerId3 is the container ran by previous attempt but finished by the
// new attempt.
container3Exists = true;
}
if (status.GetContainerId().Equals(containerId4))
{
// containerId4 is the Acquired Container killed by the previous attempt,
// it's now inside new attempt's finished container list.
container4Exists = true;
}
if (status.GetContainerId().Equals(containerId5))
{
// containerId5 is the Allocated container killed by previous failed attempt.
container5Exists = true;
}
if (status.GetContainerId().Equals(containerId6))
{
// containerId6 is the reserved container killed by previous failed attempt.
container6Exists = true;
}
}
NUnit.Framework.Assert.IsTrue(container3Exists && container4Exists && container5Exists &&
container6Exists);
// New SchedulerApplicationAttempt also has the containers info.
rm1.WaitForState(nm1, containerId2, RMContainerState.Running);
// record the scheduler attempt for testing.
SchedulerApplicationAttempt schedulerNewAttempt = ((AbstractYarnScheduler)rm1.GetResourceScheduler
()).GetCurrentAttemptForContainer(containerId2);
// finish this application
MockRM.FinishAMAndVerifyAppState(app1, rm1, nm1, am2);
// the 2nd attempt released the 1st attempt's running container, when the
// 2nd attempt finishes.
NUnit.Framework.Assert.IsFalse(schedulerNewAttempt.GetLiveContainers().Contains(containerId2
));
// all 4 normal containers finished.
System.Console.Out.WriteLine("New attempt's just finished containers: " + newAttempt
.GetJustFinishedContainers());
WaitForContainersToFinish(5, newAttempt);
rm1.Stop();
}
