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Sangjin Lee commented on YARN-4761: ----------------------------------- To see this, you add this code to {{TestResourceTrackerService#testReconnectNode}}: {code} public void testReconnectNode() throws Exception { Configuration conf = new Configuration(); conf.set(YarnConfiguration.RM_SCHEDULER, "org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler"); rm = new MockRM(conf) { ... {code} and the test breaks: {noformat} testReconnectNode(org.apache.hadoop.yarn.server.resourcemanager.TestResourceTrackerService) Time elapsed: 1.188 sec <<< FAILURE! java.lang.AssertionError: expected:<15360> but was:<10240> at org.junit.Assert.fail(Assert.java:88) at org.junit.Assert.failNotEquals(Assert.java:743) at org.junit.Assert.assertEquals(Assert.java:118) at org.junit.Assert.assertEquals(Assert.java:555) at org.junit.Assert.assertEquals(Assert.java:542) at org.apache.hadoop.yarn.server.resourcemanager.TestResourceTrackerService.testReconnectNode(TestResourceTrackerService.java:1044) {noformat} > NMs reconnecting with changed capabilities can lead to wrong cluster resource > calculations on fair scheduler > ------------------------------------------------------------------------------------------------------------ > > Key: YARN-4761 > URL: https://issues.apache.org/jira/browse/YARN-4761 > Project: Hadoop YARN > Issue Type: Bug > Components: fairscheduler > Affects Versions: 2.6.4 > Reporter: Sangjin Lee > Assignee: Sangjin Lee > > YARN-3802 uncovered an issue with the scheduler where the resource > calculation can be incorrect due to async event handling. It was subsequently > fixed by YARN-4344, but it was never fixed for the fair scheduler. -- This message was sent by Atlassian JIRA (v6.3.4#6332)