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https://issues.apache.org/jira/browse/HADOOP-12352?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14710839#comment-14710839
]
Hudson commented on HADOOP-12352:
---------------------------------
FAILURE: Integrated in Hadoop-Yarn-trunk #1036 (See
[https://builds.apache.org/job/Hadoop-Yarn-trunk/1036/])
HADOOP-12352. Delay in checkpointing Trash can leave trash for 2 intervals
before deleting. Contributed by Casey Brotherton. (harsh: rev
af78767870b8296886c03f8be24cf13a4e2bd4b0)
* hadoop-common-project/hadoop-common/CHANGES.txt
*
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/TrashPolicyDefault.java
> Delay in checkpointing Trash can leave trash for 2 intervals before deleting
> ----------------------------------------------------------------------------
>
> Key: HADOOP-12352
> URL: https://issues.apache.org/jira/browse/HADOOP-12352
> Project: Hadoop Common
> Issue Type: Bug
> Components: trash
> Affects Versions: 2.7.1
> Reporter: Casey Brotherton
> Assignee: Casey Brotherton
> Priority: Trivial
> Fix For: 2.8.0
>
> 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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