[jira] [Created] (YARN-6249) TestFairSchedulerPreemption is inconsistently failing on trunk

["Sean Po (JIRA)" <ji...@apache.org>]

Sean Po created YARN-6249:
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             Summary: TestFairSchedulerPreemption is inconsistently failing on trunk
                 Key: YARN-6249
                 URL: https://issues.apache.org/jira/browse/YARN-6249
             Project: Hadoop YARN
          Issue Type: Bug
          Components: fairscheduler, resourcemanager
            Reporter: Sean Po


Tests in TestFairSchedulerPreemption.java will inconsistently fail on trunk. An example stack trace: 

Tests run: 24, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 24.879 sec <<< FAILURE! - in org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.TestFairSchedulerPreemption
testPreemptionSelectNonAMContainer[MinSharePreemptionWithDRF](org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.TestFairSchedulerPreemption)  Time elapsed: 10.475 sec  <<< FAILURE!
java.lang.AssertionError: Incorrect number of containers on the greedy app expected:<4> but was:<8>
	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.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.TestFairSchedulerPreemption.verifyPreemption(TestFairSchedulerPreemption.java:288)
	at org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.TestFairSchedulerPreemption.testPreemptionSelectNonAMContainer(TestFairSchedulerPreemption.java:363)



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