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https://issues.apache.org/jira/browse/HDFS-4801?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tsz Wo (Nicholas), SZE resolved HDFS-4801.
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Resolution: Fixed
I have committed this. Thanks Jing!
> lsSnapshottableDir throws IllegalArgumentException when root is made
> snapshottable
> ----------------------------------------------------------------------------------
>
> Key: HDFS-4801
> URL: https://issues.apache.org/jira/browse/HDFS-4801
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: namenode
> Reporter: Ramya Sunil
> Assignee: Jing Zhao
> Priority: Minor
> Fix For: Snapshot (HDFS-2802)
>
> Attachments: HDFS-4801.001.patch
>
>
> $ hadoop dfsadmin -allowSnapshot /
> Allowing snaphot on / succeeded
> $ hadoop lsSnapshottableDir
> Exception in thread "main" java.lang.IllegalArgumentException: Can not create
> a Path from an empty string
> at org.apache.hadoop.fs.Path.checkPathArg(Path.java:82)
> at org.apache.hadoop.fs.Path.<init>(Path.java:90)
> at org.apache.hadoop.fs.Path.<init>(Path.java:45)
> at
> org.apache.hadoop.hdfs.protocol.SnapshottableDirectoryStatus.getFullPath(SnapshottableDirectoryStatus.java:125)
> at
> org.apache.hadoop.hdfs.protocol.SnapshottableDirectoryStatus.print(SnapshottableDirectoryStatus.java:166)
> at
> org.apache.hadoop.hdfs.tools.snapshot.LsSnapshottableDir.main(LsSnapshottableDir.java:55)
> Whereas,
> $ hadoop dfsadmin -disallowSnapshot /
> Disallowing snaphot on / succeeded
> $ hadoop lsSnapshottableDir
> $
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