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