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https://issues.apache.org/jira/browse/MAPREDUCE-6507?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14950154#comment-14950154
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Rohith Sharma K S commented on MAPREDUCE-6507:
----------------------------------------------
Looks like MiniMRYarnCluster start is not waiting for all the NodeManagers to
start and register with RM which causes random failure depends on the machine
load.
> TestRMNMInfo fails intermittently
> ---------------------------------
>
> Key: MAPREDUCE-6507
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6507
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Reporter: Rohith Sharma K S
>
> TestRMNMInfo fails intermittently. Below is trace for the failure
> {noformat}
> testRMNMInfo(org.apache.hadoop.mapreduce.v2.TestRMNMInfo) Time elapsed: 0.28
> sec <<< FAILURE!
> java.lang.AssertionError: Unexpected number of live nodes: expected:<4> but
> was:<3>
> 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.mapreduce.v2.TestRMNMInfo.testRMNMInfo(TestRMNMInfo.java:111)
> {noformat}
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