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  1. HBase
  2. HBASE-25666

Explain why balancer is skipping runs

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      Balancer needs to find the balance of keeping cluster balanced and stable. There is a configuration minCostNeedBalance as the threshold of imbalance to try to balance. Since we use a single score to combine all the factors we consider, it is hard for operation to understand why balancer is "stuck". We should add to master-status UI to show balancer is skipping runs and explain all factors considered, such as the weight and cost of all cost functions.

       

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              GeorryHuang Zhuoyue Huang
              claraxiong Clara Xiong
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