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https://issues.apache.org/jira/browse/SPARK-21553?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16104424#comment-16104424
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Donghui Xu commented on SPARK-21553:
------------------------------------

Please review the code on 
[https://github.com/apache/spark/pull/18755|https://github.com/apache/spark/pull/18755]

> Added the description of the default value of master parameter in the 
> spark-shell
> ---------------------------------------------------------------------------------
>
>                 Key: SPARK-21553
>                 URL: https://issues.apache.org/jira/browse/SPARK-21553
>             Project: Spark
>          Issue Type: Improvement
>          Components: Spark Shell
>    Affects Versions: 2.2.0
>            Reporter: Donghui Xu
>            Priority: Minor
>
> When I type spark-shell --help, I find that the default value description for 
> the master parameter is missing. The user does not know what the default 
> value is when the master parameter is not included, so we need to add the 
> master parameter default description to the help information.



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