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https://issues.apache.org/jira/browse/YARN-5613?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Daniel Templeton updated YARN-5613:
-----------------------------------
    Attachment: YARN-5613.001.patch

The issue shows up when running 
{{TestAMRMClient.testAMRMClientWithBlacklist()}} using fair scheduler as the 
default.  The error is:

{noformat}
expected:<0> but was:<1>
Stacktrace

java.lang.AssertionError: expected:<0> but was:<1>
        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.client.api.impl.TestAMRMClient.testAllocationWithBlacklist(TestAMRMClient.java:537)
Standard Output
{noformat}

This patch appears to resolve the issue, but I'm still testing.

> Fair Scheduler can assign containers from blacklisted nodes
> -----------------------------------------------------------
>
>                 Key: YARN-5613
>                 URL: https://issues.apache.org/jira/browse/YARN-5613
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: fairscheduler
>    Affects Versions: 2.8.0
>            Reporter: Daniel Templeton
>            Assignee: Daniel Templeton
>         Attachments: YARN-5613.001.patch
>
>
> The {{FairScheduler.allocate()}} makes its resource request before it updates 
> the blacklist.  If the scheduler processes the resource request before the 
> allocating thread updates the blacklist, the scheduler can assign containers 
> that are on nodes in the blacklist.



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