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Clara Xiong commented on HBASE-25666: ------------------------------------- I reopened this Jira to add more logging but instead opened a new jira. Sorry. This Jira is good for now. > 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 > Assignee: Zhuoyue Huang > Priority: Major > Fix For: 3.0.0-alpha-1, 2.5.0, 2.4.4 > > > 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. > -- This message was sent by Atlassian Jira (v8.3.4#803005)