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ASF GitHub Bot commented on YARN-5829: -------------------------------------- Github user szegedim commented on a diff in the pull request: https://github.com/apache/hadoop/pull/201#discussion_r106266603 --- Diff: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/TestFSSchedulerNode.java --- @@ -0,0 +1,360 @@ +package org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair; + +import org.apache.hadoop.yarn.api.records.Container; +import org.apache.hadoop.yarn.api.records.ContainerId; +import org.apache.hadoop.yarn.api.records.ExecutionType; +import org.apache.hadoop.yarn.api.records.Resource; +import org.apache.hadoop.yarn.server.resourcemanager.rmcontainer.RMContainer; +import org.apache.hadoop.yarn.server.resourcemanager.rmnode.RMNode; +import org.apache.hadoop.yarn.util.resource.Resources; +import org.junit.Test; +import org.mockito.invocation.InvocationOnMock; +import org.mockito.stubbing.Answer; + +import java.util.ArrayList; +import java.util.Collections; + +import static org.junit.Assert.assertEquals; +import static org.junit.Assert.assertNotEquals; +import static org.junit.Assert.assertTrue; +import static org.mockito.Mockito.mock; +import static org.mockito.Mockito.when; + +/** + * Test scheduler node, especially preemption reservations. --- End diff -- Only, if all the preemption classes are used by the test. This is a real unit test for the class FSSchedulerNode. In this case the unit test is restricted to mocks and only FSSchedulerNode is a real class. All in all, I see this as a test of a limited subset of preemption functionality restricted to FSSchedulerNode, so it should be in a class named TestFSSchedulerNode. If you want me to add additional functional tests to TestFairSchedulerPreemption, I am happy to do that. > FS preemption should reserve a node before considering containers on it for > preemption > -------------------------------------------------------------------------------------- > > Key: YARN-5829 > URL: https://issues.apache.org/jira/browse/YARN-5829 > Project: Hadoop YARN > Issue Type: Sub-task > Components: fairscheduler > Reporter: Karthik Kambatla > Assignee: Miklos Szegedi > > FS preemption evaluates nodes for preemption, and subsequently preempts > identified containers. If this node is not reserved for a specific > application, any other application could be allocated resources on this node. > Reserving the node for the starved application before preempting containers > would help avoid this. -- This message was sent by Atlassian JIRA (v6.3.15#6346) --------------------------------------------------------------------- To unsubscribe, e-mail: yarn-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: yarn-issues-h...@hadoop.apache.org