Wangda Tan created YARN-3581:

             Summary: Drop -directlyAccessNodeLabelStore in RMAdminCLI
                 Key: YARN-3581
             Project: Hadoop YARN
          Issue Type: Sub-task
            Reporter: Wangda Tan
            Assignee: Wangda Tan

In 2.6.0, we added an option called "-directlyAccessNodeLabelStore" to make RM 
can start with label-configured queue settings. After YARN-2918, we don't need 
this option any more, admin can configure queue setting, start RM and configure 
node label via RMAdminCLI without any error.

In addition, this option is very restrictive, first it needs to run on the same 
node where RM is running if admin configured to store labels in local disk.

Second, when admin run the option when RM is running, multiple process write to 
a same file can happen, this could make node label store becomes invalid.

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