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Posted to common-issues@hadoop.apache.org by "Zsolt Venczel (JIRA)" <ji...@apache.org> on 2017/12/07 12:21:00 UTC

[jira] [Updated] (HADOOP-15098) TestClusterTopology#testChooseRandom fails intermittently

     [ https://issues.apache.org/jira/browse/HADOOP-15098?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Zsolt Venczel updated HADOOP-15098:
-----------------------------------
    Attachment: HADOOP-15098.01.patch

Check ChiSquareTest three times as suggested by Knuth, Donald E.The Art of Computer Programming.vol.2.2 ed.Reading, MA: Addison-Wesley,1981, page 44 

> TestClusterTopology#testChooseRandom fails intermittently
> ---------------------------------------------------------
>
>                 Key: HADOOP-15098
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15098
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: test
>    Affects Versions: 3.0.0
>            Reporter: Zsolt Venczel
>            Assignee: Zsolt Venczel
>              Labels: flaky-test
>         Attachments: HADOOP-15098.01.patch
>
>
> Flaky test failure:
> {code:java}
> java.lang.AssertionError
> Error
> Not choosing nodes randomly
> Stack Trace
> java.lang.AssertionError: Not choosing nodes randomly
> at org.apache.hadoop.net.TestClusterTopology.testChooseRandom(TestClusterTopology.java:170)
> {code}



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