Clara Xiong created HBASE-25666:
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Summary: Explain why balancer is skipping runs
Key: HBASE-25666
URL: https://issues.apache.org/jira/browse/HBASE-25666
Project: HBase
Issue Type: Improvement
Components: Balancer, master, UI
Reporter: Clara Xiong
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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