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https://issues.apache.org/jira/browse/HADOOP-16753?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17014910#comment-17014910
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Akira Ajisaka commented on HADOOP-16753:
----------------------------------------

Thank you [~risyomei] for your patch. The patch mostly looks good to me.
Would you add the following check before checking in DFSHAAdmin?
{code}
    if (!cmd.startsWith("-")) {
      errOut.println("Bad command '" + cmd + "': expected command starting with 
'-'");
      printUsage(errOut);
      return -1;
    }
{code}
In addition, it would be better to create a function for checking the arguments 
in HAAdmin and call the function from DFSHAAdmin to avoid writing the same code 
twice.

> Refactor HAAdmin
> ----------------
>
>                 Key: HADOOP-16753
>                 URL: https://issues.apache.org/jira/browse/HADOOP-16753
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Akira Ajisaka
>            Assignee: Xieming Li
>            Priority: Major
>         Attachments: HADOOP-16753.001.patch, HADOOP-16753.002.patch, 
> HADOOP-16753.003.patch
>
>
> https://issues.apache.org/jira/browse/YARN-9985?focusedCommentId=16991414&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16991414
> We should move HDFS-specific haadmin options from HAAdmin to DFSHAAdmin to 
> remove unnecessary if-else statements from RMAdmin command.



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