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https://issues.apache.org/jira/browse/HADOOP-2451?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jim Kellerman updated HADOOP-2451:
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Resolution: Fixed
Status: Resolved (was: Patch Available)
Tests passed. Committed.
> [hbase] End key is incorrectly assigned in many region splits
> -------------------------------------------------------------
>
> Key: HADOOP-2451
> URL: https://issues.apache.org/jira/browse/HADOOP-2451
> Project: Hadoop
> Issue Type: Bug
> Components: contrib/hbase
> Affects Versions: 0.16.0
> Reporter: Jim Kellerman
> Assignee: Jim Kellerman
> Priority: Critical
> Fix For: 0.16.0
>
> Attachments: patch.txt
>
>
> When a region is split, the new child region for the upper half of the key
> range is always assigned as null (meaning end of table). If splits only
> happen at the end of the table, this is harmless. However under a random
> write load, an inner region is just as likely to split.
> This would explain why we have seen cases where after a split, there are
> multiple regions whose end key is the end of the table (null)
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