[jira] [Created] (HBASE-21338) [balancer] If balancer is an ill-fit for cluster size, it gives little indication

["stack (JIRA)" <ji...@apache.org>]

stack created HBASE-21338:
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             Summary: [balancer] If balancer is an ill-fit for cluster size, it gives little indication
                 Key: HBASE-21338
                 URL: https://issues.apache.org/jira/browse/HBASE-21338
             Project: HBase
          Issue Type: Sub-task
          Components: Balancer
            Reporter: stack


See parent issue. Running balancer on a cluster where the max steps was way inadequate, the balancer gave little to no indication that it was ill-configured. In fact, it only logged its starting and then that there was nothing to do though the cluster was obviously out-of-whack.

Ideally the balancer would complain when say the maxSteps limit is a small fraction of what the cluster's calculated max steps are, or it would notice that the balancer is making little progress on an imbalanced cluster and shout. Can we set balancer configs w/o having to restart Master?



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