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https://issues.apache.org/jira/browse/HBASE-4627?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13131944#comment-13131944
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Nicolas Spiegelberg commented on HBASE-4627:
--------------------------------------------
Found a bug in HBASE-4489 when working on this patch. The last key in the
split algorithm is assumed to be inclusive ["0000","FFFF"] but we are treating
it as exclusive in the split() algorithm. This causes an off-by-one error in
very granular cases such as split("0", "2", 3). Will fix that bug in this
patch.
> Ability to specify a custom start/end to RegionSplitter
> -------------------------------------------------------
>
> Key: HBASE-4627
> URL: https://issues.apache.org/jira/browse/HBASE-4627
> Project: HBase
> Issue Type: Improvement
> Affects Versions: 0.94.0
> Reporter: Nicolas Spiegelberg
> Assignee: Nicolas Spiegelberg
>
> HBASE-4489 changed the default endKey on HexStringSplit from 7FFF... to
> FFFF... While this is correct, existing users of 0.90 RegionSplitter have
> 7FFF as the end key in their schema and the last region will not split
> properly under this new code. We need to let the user specify a custom
> start/end key range for when situations like this arise. Optimally, we
> should also write the start/end key in META so we could figure this out
> implicitly instead of requiring the user to explicitly specify it.
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