/// <summary>
/// Whether this app has containers requests that could be satisfied on the
/// given node, if the node had full space.
/// </summary>
public virtual bool HasContainerForNode(Priority prio, FSSchedulerNode node)
{
ResourceRequest anyRequest = GetResourceRequest(prio, ResourceRequest.Any);
ResourceRequest rackRequest = GetResourceRequest(prio, node.GetRackName());
ResourceRequest nodeRequest = GetResourceRequest(prio, node.GetNodeName());
return(anyRequest != null && anyRequest.GetNumContainers() > 0 && (anyRequest.GetRelaxLocality
() || (rackRequest != null && rackRequest.GetNumContainers() > 0)) && (rackRequest
== null || rackRequest.GetRelaxLocality() || (nodeRequest != null && nodeRequest
.GetNumContainers() > 0)) && Resources.LessThanOrEqual(ResourceCalculator, null,
anyRequest.GetCapability(), node.GetRMNode().GetTotalCapability()));
}
public override Org.Apache.Hadoop.Yarn.Api.Records.Resource AssignContainer(FSSchedulerNode
node)
{
Org.Apache.Hadoop.Yarn.Api.Records.Resource assigned = Resources.None();
if (Log.IsDebugEnabled())
{
Log.Debug("Node " + node.GetNodeName() + " offered to queue: " + GetName());
}
if (!AssignContainerPreCheck(node))
{
return(assigned);
}
IComparer <Schedulable> comparator = policy.GetComparator();
writeLock.Lock();
try
{
runnableApps.Sort(comparator);
}
finally
{
writeLock.Unlock();
}
// Release write lock here for better performance and avoiding deadlocks.
// runnableApps can be in unsorted state because of this section,
// but we can accept it in practice since the probability is low.
readLock.Lock();
try
{
foreach (FSAppAttempt sched in runnableApps)
{
if (SchedulerAppUtils.IsBlacklisted(sched, node, Log))
{
continue;
}
assigned = sched.AssignContainer(node);
if (!assigned.Equals(Resources.None()))
{
break;
}
}
}
finally
{
readLock.Unlock();
}
return(assigned);
}
/// <summary>
/// Reserve a spot for
/// <paramref name="container"/>
/// on this
/// <paramref name="node"/>
/// . If
/// the container is
/// <paramref name="alreadyReserved"/>
/// on the node, simply
/// update relevant bookeeping. This dispatches ro relevant handlers
/// in
/// <see cref="FSSchedulerNode"/>
/// ..
/// </summary>
private void Reserve(Priority priority, FSSchedulerNode node, Container container
, bool alreadyReserved)
{
Log.Info("Making reservation: node=" + node.GetNodeName() + " app_id=" + GetApplicationId
());
if (!alreadyReserved)
{
GetMetrics().ReserveResource(GetUser(), container.GetResource());
RMContainer rmContainer = base.Reserve(node, priority, null, container);
node.ReserveResource(this, priority, rmContainer);
}
else
{
RMContainer rmContainer = node.GetReservedContainer();
base.Reserve(node, priority, rmContainer, container);
node.ReserveResource(this, priority, rmContainer);
}
}
private Org.Apache.Hadoop.Yarn.Api.Records.Resource AssignContainer(FSSchedulerNode
node, bool reserved)
{
if (Log.IsDebugEnabled())
{
Log.Debug("Node offered to app: " + GetName() + " reserved: " + reserved);
}
ICollection <Priority> prioritiesToTry = (reserved) ? Arrays.AsList(node.GetReservedContainer
().GetReservedPriority()) : GetPriorities();
// For each priority, see if we can schedule a node local, rack local
// or off-switch request. Rack of off-switch requests may be delayed
// (not scheduled) in order to promote better locality.
lock (this)
{
foreach (Priority priority in prioritiesToTry)
{
if (GetTotalRequiredResources(priority) <= 0 || !HasContainerForNode(priority, node
))
{
continue;
}
AddSchedulingOpportunity(priority);
// Check the AM resource usage for the leaf queue
if (GetLiveContainers().Count == 0 && !GetUnmanagedAM())
{
if (!((FSLeafQueue)GetQueue()).CanRunAppAM(GetAMResource()))
{
return(Resources.None());
}
}
ResourceRequest rackLocalRequest = GetResourceRequest(priority, node.GetRackName(
));
ResourceRequest localRequest = GetResourceRequest(priority, node.GetNodeName());
if (localRequest != null && !localRequest.GetRelaxLocality())
{
Log.Warn("Relax locality off is not supported on local request: " + localRequest);
}
NodeType allowedLocality;
if (scheduler.IsContinuousSchedulingEnabled())
{
allowedLocality = GetAllowedLocalityLevelByTime(priority, scheduler.GetNodeLocalityDelayMs
(), scheduler.GetRackLocalityDelayMs(), scheduler.GetClock().GetTime());
}
else
{
allowedLocality = GetAllowedLocalityLevel(priority, scheduler.GetNumClusterNodes(
), scheduler.GetNodeLocalityThreshold(), scheduler.GetRackLocalityThreshold());
}
if (rackLocalRequest != null && rackLocalRequest.GetNumContainers() != 0 && localRequest
!= null && localRequest.GetNumContainers() != 0)
{
return(AssignContainer(node, localRequest, NodeType.NodeLocal, reserved));
}
if (rackLocalRequest != null && !rackLocalRequest.GetRelaxLocality())
{
continue;
}
if (rackLocalRequest != null && rackLocalRequest.GetNumContainers() != 0 && (allowedLocality
.Equals(NodeType.RackLocal) || allowedLocality.Equals(NodeType.OffSwitch)))
{
return(AssignContainer(node, rackLocalRequest, NodeType.RackLocal, reserved));
}
ResourceRequest offSwitchRequest = GetResourceRequest(priority, ResourceRequest.Any
);
if (offSwitchRequest != null && !offSwitchRequest.GetRelaxLocality())
{
continue;
}
if (offSwitchRequest != null && offSwitchRequest.GetNumContainers() != 0)
{
if (!HasNodeOrRackLocalRequests(priority) || allowedLocality.Equals(NodeType.OffSwitch
))
{
return(AssignContainer(node, offSwitchRequest, NodeType.OffSwitch, reserved));
}
}
}
}
return(Resources.None());
}