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From "chenrongwei (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-15125) HBaseFsck's adoptHdfsOrphan function creates region with wrong end key boundary
Date Thu, 21 Jan 2016 08:05:40 GMT

    [ https://issues.apache.org/jira/browse/HBASE-15125?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15110250#comment-15110250
] 

chenrongwei commented on HBASE-15125:
-------------------------------------

I means maybe hbck did two steps to fix orphan regions. First create new region cover all
orphan HFiles. Second,just fix meta data which not refers to any actual physical data if there
still are holes in region chain. For example, the hole [cx\00,d) will be fixed by the next
step operation fix meta.

> HBaseFsck's adoptHdfsOrphan function creates region with wrong end key boundary
> -------------------------------------------------------------------------------
>
>                 Key: HBASE-15125
>                 URL: https://issues.apache.org/jira/browse/HBASE-15125
>             Project: HBase
>          Issue Type: Bug
>          Components: hbck
>    Affects Versions: 2.0.0
>            Reporter: chenrongwei
>            Assignee: chenrongwei
>         Attachments: HBASE-15125-V001.patch, HBASE-15125-v002.patch, HBASE-15125-v003.patch,
HBASE-15125-v004.patch
>
>
> There is a bug in HBaseFsck's adoptHdfsOrphan function.At the last of this function will
create a region,which want to cover all the orphan regions.But the end key of this new region
was set incorrectly.Correct region's boundary should be [startKey,endKey),but this function
create a region with boundary of [startKey,endKey],this bug will leads to scan operation omit
some data.
> I think we should create the region like bellow,
>     // create new region on hdfs. move data into place.
>     HRegionInfo hri = new HRegionInfo(template.getTableName(), orphanRegionRange.getFirst(),
>         Bytes.add(orphanRegionRange.getSecond(), new byte[1]));



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