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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-18066) Get with closest_row_before on "hbase:meta" can return empty Cell during region merge/split
Date Tue, 23 May 2017 04:07:05 GMT

    [ https://issues.apache.org/jira/browse/HBASE-18066?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16020631#comment-16020631

stack commented on HBASE-18066:

bq. Yes, and I think , better to support getClosestRowBefore in master , otherwise request
from branch-1.x hbase-client to master branch server will fail.

Interesting [~openinx]. Yeah, we removed the code already but for example, asynchbase does
not current run against hbase2 because of the missing getClosestRowBefore (which messes up
my being able to use opentsdb studying hbase2 in operation).

> Get with closest_row_before on "hbase:meta" can return empty Cell during region merge/split
> -------------------------------------------------------------------------------------------
>                 Key: HBASE-18066
>                 URL: https://issues.apache.org/jira/browse/HBASE-18066
>             Project: HBase
>          Issue Type: Bug
>          Components: hbase, regionserver
>    Affects Versions: 1.3.1
>         Environment: Linux (16.04.2), MacOS 10.11.6.
> Standalone and distributed HBase setup.
>            Reporter: Andrey Elenskiy
>            Assignee: Zheng Hu
>         Attachments: TestGetWithClosestRowBeforeWhenSplit.java
> During region split/merge there's a brief period of time where doing a "Get" with "closest_row_before=true"
on "hbase:meta" may return empty "GetResponse.result.cell" field even though parent, splitA
and splitB regions are all in "hbase:meta". Both gohbase (https://github.com/tsuna/gohbase)
and AsyncHBase (https://github.com/OpenTSDB/asynchbase) interprets this as "TableDoesNotExist",
which is returned to the client.
> Here's a gist that reproduces this problem: https://gist.github.com/Timoha/c7a236b768be9220e85e53e1ca53bf96.
Note that you have to use older HTable client (I used 1.2.4) as current versions ignore `Get.setClosestRowBefore(bool)`

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