[jira] [Created] (HDFS-12002) Ozone : SCM cli misc fixes/improvements

["Chen Liang (JIRA)" <ji...@apache.org>]

Chen Liang created HDFS-12002:
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             Summary: Ozone : SCM cli misc fixes/improvements
                 Key: HDFS-12002
                 URL: https://issues.apache.org/jira/browse/HDFS-12002
             Project: Hadoop HDFS
          Issue Type: Sub-task
            Reporter: Chen Liang
            Assignee: Chen Liang
             Fix For: ozone


Currently there are a few minor issues with the SCM CLI:

1. some commands do not use -c option to take container name. an issue with this is that arguments need to be in a certain order to be correctly parsed, e.g.:
{{./bin/hdfs scm -container -del c0 -f}} works, but
{{./bin/hdfs scm -container -del -f c0}} will not

2.some subcommands are not displaying the errors in the best way it could be, e.g.:
{{./bin/hdfs scm -container -del}} is wrong because it misses container name. So cli complains 
{code}
Missing argument for option: del
Unrecognized options:[-container, -del]
usage: hdfs scm <commands> [<options>]
where <commands> can be one of the following
 -container   Container related options
{code}
but this does not really show that it is container name it is missing

3. probably better to rename -del to -delete to be consistent with other commands like -create and -info

4. when passing in invalid argument e.g. -info on a non-existing container, an exception will be displayed. We probably should not scare the users, and only display just one error message. And move the exception display to debug mode display or something.



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