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https://issues.apache.org/jira/browse/HDFS-4868?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14544986#comment-14544986
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Rakesh R commented on HDFS-4868:
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[~cnauroth] shall we close this jira as we have done the necessary changes to
support snapshot methods in {{ViewFileSystem}}.
> Clean up error message when trying to snapshot using ViewFileSystem
> -------------------------------------------------------------------
>
> Key: HDFS-4868
> URL: https://issues.apache.org/jira/browse/HDFS-4868
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: snapshots
> Affects Versions: 3.0.0
> Reporter: Stephen Chu
> Priority: Minor
>
> Snapshots aren't supported for the ViewFileSystem. When users try to create a
> snapshot, they'll run into a message like the following:
> {code}
> schu-mbp:presentation schu$ hadoop fs -createSnapshot /user/schu
> -createSnapshot: Fatal internal error
> java.lang.UnsupportedOperationException: ViewFileSystem doesn't support
> createSnapshot
> at org.apache.hadoop.fs.FileSystem.createSnapshot(FileSystem.java:2285)
> at
> org.apache.hadoop.fs.shell.SnapshotCommands$CreateSnapshot.processArguments(SnapshotCommands.java:87)
> at
> org.apache.hadoop.fs.shell.Command.processRawArguments(Command.java:194)
> at org.apache.hadoop.fs.shell.Command.run(Command.java:155)
> at org.apache.hadoop.fs.FsShell.run(FsShell.java:255)
> at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
> at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:84)
> at org.apache.hadoop.fs.FsShell.main(FsShell.java:305)
> {code}
> To make things more readable and avoid confusion, it would be helpful to
> clean up the error message stacktrace and just state that ViewFileSystem
> doesn't support createSnapshot, similar to what was done in HDFS-4846. The
> "fatal internal error" message is a bit scary and it might be useful to
> remove that message to avoid confusion from operators.
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