[jira] [Created] (SLIDER-578) Change RoleHistory#failedNodes to Set

[Ted Yu (JIRA)]

Ted Yu created SLIDER-578:
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             Summary: Change RoleHistory#failedNodes to Set
                 Key: SLIDER-578
                 URL: https://issues.apache.org/jira/browse/SLIDER-578
             Project: Slider
          Issue Type: Improvement
            Reporter: Ted Yu
            Assignee: Ted Yu
            Priority: Minor


Currently RoleHistory#failedNodes is backed by a Map.

Using Set should suffice since every value is the dummy value.



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