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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-19850) The number of Offline Regions is wrong after restoring a snapshot
Date Tue, 17 Apr 2018 15:08:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-19850?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16440982#comment-16440982
] 

Ted Yu commented on HBASE-19850:
--------------------------------

The patch looks good.

Can you check https://builds.apache.org/job/PreCommit-HBASE-Build/12488/artifact/patchprocess/patch-javac-2.5.2.txt
and see why the compilation failed ?

> The number of Offline Regions is wrong after restoring a snapshot
> -----------------------------------------------------------------
>
>                 Key: HBASE-19850
>                 URL: https://issues.apache.org/jira/browse/HBASE-19850
>             Project: HBase
>          Issue Type: Bug
>          Components: snapshots
>            Reporter: Toshihiro Suzuki
>            Assignee: Toshihiro Suzuki
>            Priority: Major
>             Fix For: 1.5.0
>
>         Attachments: HBASE-19850-branch-1.patch, HBASE-19850.branch-1.001.patch, HBASE-19850.branch-1.001.patch,
The number of Offline Regions.png
>
>
> Steps to reproduce are as follows:
> 1. Create a table
> {code:java}
> create "test", "cf"
> {code}
> 2. Take a snapshot for the table
> {code:java}
> snapshot "test", "snap"
> {code}
> 3. Load data to the table
> {code:java}
> (0...2000).each{|i| put "test", "row#{i}", "cf:col", "val"}
> {code}
> 4. Split regions of the table
> {code:java}
> split "test"
> {code}
> 5. Restore the table from the snapshot
> {code:java}
> disable "test"
> restore_snapshot "snap"
> enable "test"
> {code}
>  
> The number of Offline Regions is as follows:
> !The number of Offline Regions.png!
> The number of Offline Regions should be zero.
> It seems like when regions are removed by restoring a snapshot, the number of Offline
Regions becomes wrong. And as far as I reviewed the code, it seems like the Offline Regions will
not be cleaned up. After restarting Master, the offline regions disappear.
>  



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