BELUGA BEHR created YARN-8146:

             Summary: Remove LinkedList From 
resourcemanager.reservation.planning Package
                 Key: YARN-8146
             Project: Hadoop YARN
          Issue Type: Improvement
          Components: reservation system
    Affects Versions: 3.0.1
            Reporter: BELUGA BEHR

Remove {{LinkedList}} instances in favor of {{ArrayList}}.  {{ArrayList}} is 
generally more memory efficient, require less memory fragmentation, and with 
memory localization, faster to iterate.

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