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https://issues.apache.org/jira/browse/HDFS-10985?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15563210#comment-15563210
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Steve Loughran commented on HDFS-10985:
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+1
> o.a.h.ha.TestZKFailoverController should not use fixed time sleep before
> assertions
> -----------------------------------------------------------------------------------
>
> Key: HDFS-10985
> URL: https://issues.apache.org/jira/browse/HDFS-10985
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: ha, test
> Reporter: Mingliang Liu
> Assignee: Mingliang Liu
> Priority: Minor
> Attachments: HDFS-10985-branch-2.8.001.patch, HDFS-10985.000.patch,
> HDFS-10985.001.patch
>
>
> {{TestZKFailoverController#testGracefulFailoverMultipleZKfcs}} uses fixed
> time sleep before assertions. This may fail sometimes though 10 seconds are
> generally long enough. I think we can use {{GenericTestUtils.waitFor()}} to
> retry the assertions.
> This is also true to {{TestZKFailoverController#testGracefulFailover}}.
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