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https://issues.apache.org/jira/browse/HBASE-22639?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16884276#comment-16884276
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Zheng Wang commented on HBASE-22639:
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I did some test for it .
My test env has 5 nodes,and my test table has 15 regions,each node has 3 
regions.
I moved 2 regions from node1 to node2,and then execute major_compact the last 
region on node1, it splited to 2 region.
I couldn't reproduce it by restart node,but it may happen theoretically,and 
happened in my live env in fact.
My advice is make an improvement of SteppingSplitPolicy , don't split the 
region when table is big enough even it is the only one on a node.

> Unexpected split when a big table has only one region on a regionServer 
> ------------------------------------------------------------------------
>
>                 Key: HBASE-22639
>                 URL: https://issues.apache.org/jira/browse/HBASE-22639
>             Project: HBase
>          Issue Type: Improvement
>          Components: regionserver
>    Affects Versions: 2.0.0
>            Reporter: Zheng Wang
>            Priority: Minor
>
> I am using the default policy named SteppingSplitPolicy.
> If restart some nodes,it may occur,because this policy didnot judge if the 
> table is big enough actually.
> It brings some unexpected small regions.



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