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From "Wilfred Spiegelenburg (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-8944) TestContainerAllocation.testUserLimitAllocationMultipleContainers failure after YARN-8896
Date Sun, 28 Oct 2018 23:29:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-8944?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16666601#comment-16666601

Wilfred Spiegelenburg commented on YARN-8944:

The two new failures in this junit test are caused by HADOOP-15864. It changes the return
value of the {{SecurityUtil.buildTokenService}}.
I have added a comment in that jira as it has far wider implications to the YARN and MR code

> TestContainerAllocation.testUserLimitAllocationMultipleContainers failure after YARN-8896
> -----------------------------------------------------------------------------------------
>                 Key: YARN-8944
>                 URL: https://issues.apache.org/jira/browse/YARN-8944
>             Project: Hadoop YARN
>          Issue Type: Test
>          Components: capacity scheduler
>    Affects Versions: 3.1.2, 3.2.1
>            Reporter: Wilfred Spiegelenburg
>            Assignee: Wilfred Spiegelenburg
>            Priority: Major
>         Attachments: YARN-8944.001.patch
> YARN-8896 changes the behaviour of the CapacityScheduler by limiting the number of containers
that can be allocated in one heartbeat. It is an undocumented change in behaviour.
> The change breaks the junit test: {{TestContainerAllocation.testUserLimitAllocationMultipleContainers}}
> The maximum number of containers that gets assigned via the on heartbeat is 100 and it
expects 199 to be assigned.

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