[jira] [Created] (HDFS-5360) Improvement of usage message of renameSnapshot and deleteSnapshot

["Shinichi Yamashita (JIRA)" <ji...@apache.org>]

Shinichi Yamashita created HDFS-5360:
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             Summary: Improvement of usage message of renameSnapshot and deleteSnapshot
                 Key: HDFS-5360
                 URL: https://issues.apache.org/jira/browse/HDFS-5360
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: snapshots
    Affects Versions: 3.0.0
            Reporter: Shinichi Yamashita
            Priority: Minor


When the argument of "hdfs dfs -createSnapshot" comamnd is inappropriate, it is displayed as follows.

{code}
[hadoop@trunk ~]$ hdfs dfs -createSnapshot
-createSnapshot: <snapshotDir> is missing.
Usage: hadoop fs [generic options] -createSnapshot <snapshotDir> [<snapshotName>]
{code}

On the other hands, the commands of "-renameSnapshot" and "-deleteSnapshot" is displayed as follows. And there are not kind for the user.

{code}
[hadoop@trunk ~]$ hdfs dfs -renameSnapshot
renameSnapshot: args number not 3: 0

[hadoop@trunk ~]$ hdfs dfs -deleteSnapshot
deleteSnapshot: args number not 2: 0
{code}

It changes "-renameSnapshot" and "-deleteSnapshot" to output the message which is similar to "-createSnapshot".



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