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https://issues.apache.org/jira/browse/HDFS-8118?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14710624#comment-14710624
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Harsh J commented on HDFS-8118:
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Thanks Casey,
You can run individual tests locally via {{mvn test
-Dtest=TestWebDelegationToken}} for example. The jenkins build cannot retrigger
specific tests, but you can always check past/future builds to also inspect if
the test has been generally flaky, and search JIRA/emails to see if this has/is
already been reported/being worked on.
It doesn't appear related to the behaviour fix we're making here, and the test
does pass locally for me, so I'm committing this shortly.
> Delay in checkpointing Trash can leave trash for 2 intervals before deleting
> ----------------------------------------------------------------------------
>
> Key: HDFS-8118
> URL: https://issues.apache.org/jira/browse/HDFS-8118
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 2.7.1
> Reporter: Casey Brotherton
> Assignee: Casey Brotherton
> Priority: Trivial
> Attachments: HDFS-8118.001.patch, HDFS-8118.patch
>
>
> When the fs.trash.checkpoint.interval and the fs.trash.interval are set
> non-zero and the same, it is possible for trash to be left for two intervals.
> The TrashPolicyDefault will use a floor and ceiling function to ensure that
> the Trash will be checkpointed every "interval" of minutes.
> Each user's trash is checkpointed individually. The time resolution of the
> checkpoint timestamp is to the second.
> If the seconds switch while one user is checkpointing, then the next user's
> timestamp will be later.
> This will cause the next user's checkpoint to not be deleted at the next
> interval.
> I have recreated this in a lab cluster
> I also have a suggestion for a patch that I can upload later tonight after
> testing it further.
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