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https://issues.apache.org/jira/browse/HDFS-12730?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16254707#comment-16254707
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Yongjun Zhang commented on HDFS-12730:
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Hi [~manojg],
Thanks for the diligence on adding the tests. It looks good to me, one
question: the test you added started with disabling the feature, then create
snapshot. Can we also have a test that starts with the feature enabled, create
snapshots, then disable the feature?
> Verify open files captured in the snapshots across config disable and enable
> ----------------------------------------------------------------------------
>
> Key: HDFS-12730
> URL: https://issues.apache.org/jira/browse/HDFS-12730
> Project: Hadoop HDFS
> Issue Type: Test
> Components: hdfs
> Affects Versions: 3.0.0
> Reporter: Manoj Govindassamy
> Assignee: Manoj Govindassamy
> Attachments: HDFS-12730.01.patch
>
>
> Open files captured in the snapshots have their meta data preserved based on
> the config
> _dfs.namenode.snapshot.capture.openfiles_ (refer HDFS-11402). During the
> upgrade scenario or when the NameNode gets restarted with config turned on or
> off, the attributes of the open files captured in the snapshots are
> influenced accordingly. Better to have a test case to verify open file
> attributes across config turn on and off, and the current expected behavior
> with HDFS-11402 so as to catch any regressions in the future.
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