public virtual void Handle(ContainerAllocatorEvent @event)
{
if (@event.GetType() == ContainerAllocator.EventType.ContainerReq)
{
Log.Info("Processing the event " + @event.ToString());
// Assign the same container ID as the AM
ContainerId cID = ContainerId.NewContainerId(GetContext().GetApplicationAttemptId
(), this.containerId.GetContainerId());
Container container = recordFactory.NewRecordInstance <Container>();
container.SetId(cID);
NodeId nodeId = NodeId.NewInstance(this.nmHost, this.nmPort);
container.SetNodeId(nodeId);
container.SetContainerToken(null);
container.SetNodeHttpAddress(this.nmHost + ":" + this.nmHttpPort);
// send the container-assigned event to task attempt
if (@event.GetAttemptID().GetTaskId().GetTaskType() == TaskType.Map)
{
JobCounterUpdateEvent jce = new JobCounterUpdateEvent(@event.GetAttemptID().GetTaskId
().GetJobId());
// TODO Setting OTHER_LOCAL_MAP for now.
jce.AddCounterUpdate(JobCounter.OtherLocalMaps, 1);
eventHandler.Handle(jce);
}
eventHandler.Handle(new TaskAttemptContainerAssignedEvent(@event.GetAttemptID(),
container, applicationACLs));
}
}
private void RunTask(ContainerRemoteLaunchEvent launchEv, IDictionary <TaskAttemptID
, MapOutputFile> localMapFiles)
{
TaskAttemptId attemptID = launchEv.GetTaskAttemptID();
Org.Apache.Hadoop.Mapreduce.V2.App.Job.Job job = this._enclosing.context.GetAllJobs
()[attemptID.GetTaskId().GetJobId()];
int numMapTasks = job.GetTotalMaps();
int numReduceTasks = job.GetTotalReduces();
// YARN (tracking) Task:
Task ytask = job.GetTask(attemptID.GetTaskId());
// classic mapred Task:
Task remoteTask = launchEv.GetRemoteTask();
// after "launching," send launched event to task attempt to move
// state from ASSIGNED to RUNNING (also nukes "remoteTask", so must
// do getRemoteTask() call first)
//There is no port number because we are not really talking to a task
// tracker. The shuffle is just done through local files. So the
// port number is set to -1 in this case.
this._enclosing.context.GetEventHandler().Handle(new TaskAttemptContainerLaunchedEvent
(attemptID, -1));
if (numMapTasks == 0)
{
this.doneWithMaps = true;
}
try
{
if (remoteTask.IsMapOrReduce())
{
JobCounterUpdateEvent jce = new JobCounterUpdateEvent(attemptID.GetTaskId().GetJobId
());
jce.AddCounterUpdate(JobCounter.TotalLaunchedUbertasks, 1);
if (remoteTask.IsMapTask())
{
jce.AddCounterUpdate(JobCounter.NumUberSubmaps, 1);
}
else
{
jce.AddCounterUpdate(JobCounter.NumUberSubreduces, 1);
}
this._enclosing.context.GetEventHandler().Handle(jce);
}
this.RunSubtask(remoteTask, ytask.GetType(), attemptID, numMapTasks, (numReduceTasks
> 0), localMapFiles);
}
catch (RuntimeException)
{
JobCounterUpdateEvent jce = new JobCounterUpdateEvent(attemptID.GetTaskId().GetJobId
());
jce.AddCounterUpdate(JobCounter.NumFailedUbertasks, 1);
this._enclosing.context.GetEventHandler().Handle(jce);
// this is our signal that the subtask failed in some way, so
// simulate a failed JVM/container and send a container-completed
// event to task attempt (i.e., move state machine from RUNNING
// to FAIL_CONTAINER_CLEANUP [and ultimately to FAILED])
this._enclosing.context.GetEventHandler().Handle(new TaskAttemptEvent(attemptID,
TaskAttemptEventType.TaContainerCompleted));
}
catch (IOException ioe)
{
// if umbilical itself barfs (in error-handler of runSubMap()),
// we're pretty much hosed, so do what YarnChild main() does
// (i.e., exit clumsily--but can never happen, so no worries!)
LocalContainerLauncher.Log.Fatal("oopsie... this can never happen: " + StringUtils
.StringifyException(ioe));
ExitUtil.Terminate(-1);
}
finally
{
// remove my future
if (Sharpen.Collections.Remove(this.futures, attemptID) != null)
{
LocalContainerLauncher.Log.Info("removed attempt " + attemptID + " from the futures to keep track of"
);
}
}
}