Package org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity

Class CSMaxRunningAppsEnforcer

java.lang.Object

org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CSMaxRunningAppsEnforcer

public class CSMaxRunningAppsEnforcer
extends java.lang.Object

Handles tracking and enforcement for user and queue maxRunningApps constraints.

Constructor Summary

Constructors

Constructor	Description
CSMaxRunningAppsEnforcer(CapacityScheduler scheduler)

Method Summary

Modifier and Type	Method	Description
boolean	checkRunnabilityWithUpdate(FiCaSchedulerApp attempt)	Checks whether making the application runnable would exceed any maxRunningApps limits.
void	trackApp(FiCaSchedulerApp app)
void	untrackApp(FiCaSchedulerApp app)
void	updateRunnabilityOnAppRemoval(FiCaSchedulerApp app)	Checks to see whether any other applications runnable now that the given application has been removed from the given queue.
void	updateRunnabilityOnReload()	This is called after reloading the allocation configuration when the scheduler is reinitialized Checks to see whether any non-runnable applications become runnable now that the max running apps of given queue has been changed Runs in O(n) where n is the number of apps that are non-runnable and in the queues that went from having no slack to having slack.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CSMaxRunningAppsEnforcer

public CSMaxRunningAppsEnforcer(CapacityScheduler scheduler)

Method Detail

checkRunnabilityWithUpdate

public boolean checkRunnabilityWithUpdate(FiCaSchedulerApp attempt)

Checks whether making the application runnable would exceed any maxRunningApps limits. Also sets the "runnable" flag on the attempt.

Parameters:

attempt - the app attempt being checked

Returns:

true if the application is runnable; false otherwise

trackApp

public void trackApp(FiCaSchedulerApp app)

updateRunnabilityOnReload

public void updateRunnabilityOnReload()

This is called after reloading the allocation configuration when the scheduler is reinitialized Checks to see whether any non-runnable applications become runnable now that the max running apps of given queue has been changed Runs in O(n) where n is the number of apps that are non-runnable and in the queues that went from having no slack to having slack.

updateRunnabilityOnAppRemoval

public void updateRunnabilityOnAppRemoval(FiCaSchedulerApp app)

Checks to see whether any other applications runnable now that the given application has been removed from the given queue. And makes them so. Runs in O(n log(n)) where n is the number of queues that are under the highest queue that went from having no slack to having slack.

Parameters:

app - FiCaSchedulerApp.

untrackApp

public void untrackApp(FiCaSchedulerApp app)