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From "Mingliang Liu (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HDFS-10666) Über-jira: Unit tests should not use fixed sleep interval to wait for conditions
Date Sat, 12 Nov 2016 03:24:59 GMT

     [ https://issues.apache.org/jira/browse/HDFS-10666?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Mingliang Liu resolved HDFS-10666.
----------------------------------
          Resolution: Fixed
    Target Version/s: 2.8.0  (was: 3.0.0-alpha2)

> Über-jira: Unit tests should not use fixed sleep interval to wait for conditions
> --------------------------------------------------------------------------------
>
>                 Key: HDFS-10666
>                 URL: https://issues.apache.org/jira/browse/HDFS-10666
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: test
>            Reporter: Mingliang Liu
>            Assignee: Mingliang Liu
>
> There have been dozens of intermittent failing unit tests because they depend on fixed-interval
sleep to wait for conditions to reach before assertion. This umbrella jira is to replace these
sleep statements with:
> * {{GenericTestUtils.waitFor()}} to retry the conditions/assertions
> * Trigger internal state change of code to test, e.g. for {{MiniDFSCluster}} we can trigger
{BlockReports,HeartBeats,DeletionReports}
> * Fails fast if specific exceptions are caught
> * Coordinate the JUnit thread with activities of the internal threads
> * _ad-hoc fixes_...
> p.s. I don't know how closures in Java 8 comes into play but I'd like to see any effort.



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