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https://issues.apache.org/jira/browse/HDFS-8118?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Casey Brotherton updated HDFS-8118:
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Attachment: HDFS-8118.001.patch
This is a simplified patch addressing only the defect, and not the testcases.
> 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
> 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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