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https://issues.apache.org/jira/browse/HDFS-11481?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15897857#comment-15897857
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Andrew Wang commented on HDFS-11481:
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Hi Mavin, thanks for filing this issue and submitting a patch!
Have you looked at fixing this on the server-side? /.reserved/raw is a
server-side construct, so it makes more sense to handle it there. Generally, we
pass the paths through to the NameNode as directly as possible besides
qualification. Since both /.reserved/raw and .snapshot are "special"
directories, our path munging might not support both.
Please also [name your patches according to the
wiki|https://wiki.apache.org/hadoop/HowToContribute#Naming_your_patch] so
precommit can pick it up correctly.
> hdfs snapshotDiff /.reserved/raw/... fails on snapshottable directories
> -----------------------------------------------------------------------
>
> Key: HDFS-11481
> URL: https://issues.apache.org/jira/browse/HDFS-11481
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: hdfs-client
> Affects Versions: 2.6.0
> Reporter: Mavin Martin
> Assignee: Mavin Martin
> Priority: Minor
> Attachments: HDFS-11481.patch.1, HDFS-11481.patch.2
>
>
> Successful command:
> {code}
> #> hdfs snapshotDiff /tmp/dir s1 s2
> Difference between snapshot s1 and snapshot s2 under directory /tmp/dir:
> M .
> + ./file1.txt
> {code}
> Unsuccessful command:
> {code}
> #> hdfs snapshotDiff /.reserved/raw/tmp/dir s1 s2
> snapshotDiff: Directory does not exist: /.reserved/raw/tmp/dir
> {code}
> Prefixing with raw path should run successfully and return same output.
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