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From "Hudson (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4927) CatalogJanior:SplitParentFirstComparator doesn't sort as expected, for the last region when the endkey is empty
Date Thu, 08 Dec 2011 02:10:40 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4927?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13164933#comment-13164933
] 

Hudson commented on HBASE-4927:
-------------------------------

Integrated in HBase-0.92 #175 (See [https://builds.apache.org/job/HBase-0.92/175/])
    HBASE-4927 Addendum fixes case where start key is empty and end key is empty

tedyu : 
Files : 
* /hbase/branches/0.92/src/main/java/org/apache/hadoop/hbase/HRegionInfo.java
* /hbase/branches/0.92/src/main/java/org/apache/hadoop/hbase/master/CatalogJanitor.java

                
> CatalogJanior:SplitParentFirstComparator doesn't sort as expected, for the last region
when the endkey is empty
> ---------------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-4927
>                 URL: https://issues.apache.org/jira/browse/HBASE-4927
>             Project: HBase
>          Issue Type: Bug
>          Components: master
>    Affects Versions: 0.92.0, 0.94.0
>            Reporter: Jimmy Xiang
>            Assignee: Jimmy Xiang
>            Priority: Minor
>             Fix For: 0.92.0
>
>         Attachments: 0001-Fixed-TestOffline-failure-caused-by-HBASE-4927.patch, 0001-Fixed-TestOffline-failure-caused-by-HBASE-4927.patch,
0001-HBASE-4927-CatalogJanior-SplitParentFirstComparator-.patch, 0001-HBASE-4927-CatalogJanior-SplitParentFirstComparator_v2.patch,
hbase-4927-fix-ws.txt
>
>
> When reviewing HBASE-4238 backporting, Jon found this issue.
> What happens if the split points are  (empty end key is the last key, empty start key
is the first key)
> Parent     [A,)
> L daughter [A,B), 
> R daughter [B,)
> When sorted, we gets to end key comparision which results in this incorrector order:
> [A,B), [A,), [B,) 
> we wanted:
> [A,), [A,B), [B,)

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