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From "Jim Kellerman (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-2451) [hbase] End key is incorrectly assigned in many region splits
Date Tue, 18 Dec 2007 03:59:43 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-2451?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jim Kellerman updated HADOOP-2451:
----------------------------------

    Status: Patch Available  (was: Open)

> [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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