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https://issues.apache.org/jira/browse/HDFS-5289?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13784539#comment-13784539
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Todd Lipcon commented on HDFS-5289:
-----------------------------------
+1, looks right to me.
> Race condition in TestRetryCacheWithHA#testCreateSymlink causes spurious test
> failure
> -------------------------------------------------------------------------------------
>
> Key: HDFS-5289
> URL: https://issues.apache.org/jira/browse/HDFS-5289
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: test
> Affects Versions: 2.1.1-beta
> Reporter: Aaron T. Myers
> Assignee: Aaron T. Myers
> Attachments: HDFS-5289.patch
>
>
> The code to check if the operation has been completed on the active NN can
> potentially execute before the thread actually doing the operation has run.
> In this case the checking code will retry the check if the result of the
> check is null. However, the test operation does not in fact return null,
> instead throwing an exception if the file doesn't exist yet. We need to catch
> the exception and retry.
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