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https://issues.apache.org/jira/browse/HDFS-9125?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14909235#comment-14909235
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Vinayakumar B commented on HDFS-9125:
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Thanks [~nijel] for the patch.
You cannot change the usage from 'fs' to 'dfs'. Though it looks to be changed,
since we are calling FsShell by invoking 'hdfs dfs' from HDFS perspective, But
FSShell is generic and any other FileSystem can use this shell. Other file
systems will call this by 'hadoop fs'. Actual FileSystem referred inside
depends on the 'fs.defaultFS' configuration or "-fs" argument from the client
side.
So you might need to keep the usage as previous. And update the new test
accordingly. Also another test failure fix may not be necessary after revert of
usage.
> Display help if the command option to "hdfs dfs " is not valid
> ---------------------------------------------------------------
>
> Key: HDFS-9125
> URL: https://issues.apache.org/jira/browse/HDFS-9125
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: nijel
> Assignee: nijel
> Priority: Minor
> Attachments: HDFS-9125_1.patch, HDFS-9125_2.patch, HDFS-9125_3.patch
>
>
> {noformat}
> master:/home/nijel/hadoop-3.0.0-SNAPSHOT/bin # ./hdfs dfs -mkdirs
> -mkdirs: Unknown command
> {noformat}
> Better to display the help info.
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