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YARN-335. Fair scheduler doesn't check whether rack needs containers before assigning to node. Contributed by Sandy Ryza. 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1433484 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Thomas White 2013-01-15 16:12:33 +00:00
parent fabecd7f25
commit 8447557333
3 changed files with 58 additions and 6 deletions
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3
hadoop-yarn-project/CHANGES.txt
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@ -189,6 +189,9 @@ Release 2.0.3-alpha - Unreleased
YARN-330. Fix flakey test: TestNodeManagerShutdown#testKillContainersOnShutdown.
(Sandy Ryza via hitesh)
YARN-335. Fair scheduler doesn't check whether rack needs containers
before assigning to node. (Sandy Ryza via tomwhite)
Release 2.0.2-alpha - 2012-09-07

19
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/AppSchedulable.java
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@ -307,20 +307,27 @@ public class AppSchedulable extends Schedulable {
// (not scheduled) in order to promote better locality.
synchronized (app) {
for (Priority priority : prioritiesToTry) {
if (app.getTotalRequiredResources(priority) <= 0) {
continue;
}
app.addSchedulingOpportunity(priority);
ResourceRequest rackLocalRequest = app.getResourceRequest(priority,
node.getRackName());
ResourceRequest localRequest = app.getResourceRequest(priority,
node.getHostName());
NodeType allowedLocality = app.getAllowedLocalityLevel(priority,
scheduler.getNumClusterNodes(), scheduler.getNodeLocalityThreshold(),
scheduler.getRackLocalityThreshold());
ResourceRequest localRequest = app.getResourceRequest(priority,
node.getHostName());
if (localRequest != null && localRequest.getNumContainers() != 0) {
if (rackLocalRequest != null && rackLocalRequest.getNumContainers() != 0
&& localRequest != null && localRequest.getNumContainers() != 0) {
return assignContainer(node, app, priority,
localRequest, NodeType.NODE_LOCAL, reserved);
}
ResourceRequest rackLocalRequest = app.getResourceRequest(priority,
node.getRackName());
if (rackLocalRequest != null && rackLocalRequest.getNumContainers() != 0
&& (allowedLocality.equals(NodeType.RACK_LOCAL) ||
allowedLocality.equals(NodeType.OFF_SWITCH))) {

42
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/TestFairScheduler.java
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@ -1275,4 +1275,46 @@ public class TestFairScheduler {
FSSchedulerApp app2 = scheduler.applications.get(attId2);
assertNull("The application was allowed", app2);
}
@Test
public void testMultipleNodesSingleRackRequest() throws Exception {
RMNode node1 = MockNodes.newNodeInfo(1, Resources.createResource(1024));
RMNode node2 = MockNodes.newNodeInfo(1, Resources.createResource(1024));
RMNode node3 = MockNodes.newNodeInfo(2, Resources.createResource(1024));
NodeAddedSchedulerEvent nodeEvent1 = new NodeAddedSchedulerEvent(node1);
scheduler.handle(nodeEvent1);
NodeAddedSchedulerEvent nodeEvent2 = new NodeAddedSchedulerEvent(node2);
scheduler.handle(nodeEvent2);
ApplicationAttemptId appId = createAppAttemptId(this.APP_ID++, this.ATTEMPT_ID++);
scheduler.addApplication(appId, "queue1", "user1");
// 1 request with 2 nodes on the same rack. another request with 1 node on
// a different rack
List<ResourceRequest> asks = new ArrayList<ResourceRequest>();
asks.add(createResourceRequest(1024, node1.getHostName(), 1, 1));
asks.add(createResourceRequest(1024, node2.getHostName(), 1, 1));
asks.add(createResourceRequest(1024, node3.getHostName(), 1, 1));
asks.add(createResourceRequest(1024, node1.getRackName(), 1, 1));
asks.add(createResourceRequest(1024, node3.getRackName(), 1, 1));
asks.add(createResourceRequest(1024, RMNode.ANY, 1, 2));
scheduler.allocate(appId, asks, new ArrayList<ContainerId>());
// node 1 checks in
scheduler.update();
NodeUpdateSchedulerEvent updateEvent1 = new NodeUpdateSchedulerEvent(node1,
new ArrayList<ContainerStatus>(), new ArrayList<ContainerStatus>());
scheduler.handle(updateEvent1);
// should assign node local
assertEquals(1, scheduler.applications.get(appId).getLiveContainers().size());
// node 2 checks in
scheduler.update();
NodeUpdateSchedulerEvent updateEvent2 = new NodeUpdateSchedulerEvent(node2,
new ArrayList<ContainerStatus>(), new ArrayList<ContainerStatus>());
scheduler.handle(updateEvent2);
// should assign rack local
assertEquals(2, scheduler.applications.get(appId).getLiveContainers().size());
}
}