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https://issues.apache.org/jira/browse/YARN-10014?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated YARN-10014:
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    Labels: pull-request-available  (was: )

> Refactor boolean flag based approach in SchedConfCLI#run
> --------------------------------------------------------
>
>                 Key: YARN-10014
>                 URL: https://issues.apache.org/jira/browse/YARN-10014
>             Project: Hadoop YARN
>          Issue Type: Improvement
>            Reporter: Prabhu Joseph
>            Assignee: Oleg Bonar
>            Priority: Major
>              Labels: pull-request-available
>
> Boolean-flag based approach in 
> org.apache.hadoop.yarn.client.cli.SchedConfCLI#run: 
> Everything is controlled with boolean flags here.
> The flag hasOption is set to true in each of the if-clauses just to make the 
> condition below the hasOption-conditions happy. The flag is set to true even 
> for parameter that don't have an option (like 'getConf') at all, this is very 
> misleading and hard to understand for the first read.
> Need below refactoring:
> a. Eliminates the hasOption boolean flag
> b. Where an option is misused, fail-fast: Have a method that contains this 
> code and call it for every option, in-place:
> {code}
> if (!hasOption) {
>  System.err.println("Invalid Command Usage: ");
>  printUsage();
>  return -1;
>  }
> {code}
> c. Remove the boolean flags: format and getConf as well. These are 
> unnecessary.
> cc [~snemeth]



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