/**
* Create and return a container object reflecting an allocation for the given appliction on the
* given node with the given capability and priority.
*/
public Container createContainer(FSSchedulerNode node, Resource capability, Priority priority) {
NodeId nodeId = node.getRMNode().getNodeID();
ContainerId containerId =
BuilderUtils.newContainerId(getApplicationAttemptId(), getNewContainerId());
// Create the container
Container container =
BuilderUtils.newContainer(
containerId, nodeId, node.getRMNode().getHttpAddress(), capability, priority, null);
return container;
}
/**
* Whether this app has containers requests that could be satisfied on the given node, if the node
* had full space.
*/
public boolean hasContainerForNode(Priority prio, FSSchedulerNode node) {
ResourceRequest anyRequest = getResourceRequest(prio, ResourceRequest.ANY);
ResourceRequest rackRequest = getResourceRequest(prio, node.getRackName());
ResourceRequest nodeRequest = getResourceRequest(prio, node.getNodeName());
return
// There must be outstanding requests at the given priority:
anyRequest != null
&& anyRequest.getNumContainers() > 0
&&
// If locality relaxation is turned off at *-level, there must be a
// non-zero request for the node's rack:
(anyRequest.getRelaxLocality()
|| (rackRequest != null && rackRequest.getNumContainers() > 0))
&&
// If locality relaxation is turned off at rack-level, there must be a
// non-zero request at the node:
(rackRequest == null
|| rackRequest.getRelaxLocality()
|| (nodeRequest != null && nodeRequest.getNumContainers() > 0))
&&
// The requested container must be able to fit on the node:
Resources.lessThanOrEqual(
RESOURCE_CALCULATOR,
null,
anyRequest.getCapability(),
node.getRMNode().getTotalCapability());
}
