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  1. Hadoop YARN
  2. YARN-11663

[Federation] Add Cache Entity Nums Limit.

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      hi slfan1989 After apply this feature to our prod env, I found the memory of the router keeps growing over time. This is because after jobs finished, we won't access the expired key to trigger cleanup mechanism. Is it better to add cache maximum number limit?

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          Yuan Luo
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              slfan1989 Shilun Fan
              luoyuan Yuan Luo
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