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https://issues.apache.org/jira/browse/HDFS-5360?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13797941#comment-13797941
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Hudson commented on HDFS-5360:
------------------------------
FAILURE: Integrated in Hadoop-Mapreduce-trunk #1581 (See
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1581/])
Move HDFS-5360 to 2.2.1 in CHANGES.txt (wang:
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1532935)
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
HDFS-5360. Improvement of usage message of renameSnapshot and deleteSnapshot.
Contributed by Shinichi Yamashita. (wang:
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1532930)
*
/hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/shell/SnapshotCommands.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/snapshot/TestSnapshotDeletion.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/snapshot/TestSnapshotRename.java
> 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
> Assignee: Shinichi Yamashita
> Priority: Minor
> Fix For: 2.2.1
>
> Attachments: HDFS-5360.patch, HDFS-5360.patch
>
>
> 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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