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https://issues.apache.org/jira/browse/HBASE-21338?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16661230#comment-16661230
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stack commented on HBASE-21338:
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I pushed to branch-2.0+ Resolving (because I want to make an RC). [~xucang] I
made HBASE-21373 to backport this patch to branch-1 as per [~apurtell]. I tried
to backport but it does not go in clean. If you put up a patch on HBASE-21373,
I'll commit. Thanks.
> [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, Operability
> Reporter: stack
> Assignee: Xu Cang
> Priority: Major
> Fix For: 3.0.0, 1.5.0, 2.2.0, 2.0.3, 1.4.9, 2.1.2
>
> Attachments: HBASE-21338.master.001.patch
>
>
> 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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