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From "Chris Nauroth (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9370) TestDataNodeUGIProvider fails intermittently due to non-deterministic cache expiry.
Date Wed, 04 Nov 2015 18:28:28 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9370?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14990104#comment-14990104
] 

Chris Nauroth commented on HDFS-9370:
-------------------------------------

I am holding off on committing this, because HDFS-8855 has been reverted.  [~xiaobingo], please
feel free to sweep this into a revised HDFS-8855 patch.  Thank you.

> TestDataNodeUGIProvider fails intermittently due to non-deterministic cache expiry.
> -----------------------------------------------------------------------------------
>
>                 Key: HDFS-9370
>                 URL: https://issues.apache.org/jira/browse/HDFS-9370
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: test
>            Reporter: Chris Nauroth
>            Assignee: Chris Nauroth
>            Priority: Minor
>         Attachments: HDFS-9370.001.patch, HDFS-9370.002.patch
>
>
> {{TestDataNodeUGIProvider}} has hard-coded sleep times waiting for background expiration
of entries in a Guava cache.  I have seen this test suite fail intermittently, because expiration
is not guaranteed to happen strictly on the boundary of the period defined by the cache's
expiration time.



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