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From "Hadoop QA (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4298) Support to drain RS nodes through ZK
Date Thu, 03 Nov 2011 01:07:33 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4298?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13142744#comment-13142744
] 

Hadoop QA commented on HBASE-4298:
----------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12502063/drainingservertest-v2.txt
  against trunk revision .

    +1 @author.  The patch does not contain any @author tags.

    +1 tests included.  The patch appears to include 2 new or modified tests.

    -1 javadoc.  The javadoc tool appears to have generated -164 warning messages.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    -1 findbugs.  The patch appears to introduce 46 new Findbugs (version 1.3.9) warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit
warnings.

     -1 core tests.  The patch failed these unit tests:
     

Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/147//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/147//artifact/trunk/patchprocess/newPatchFindbugsWarnings.html
Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/147//console

This message is automatically generated.
                
> Support to drain RS nodes through ZK
> ------------------------------------
>
>                 Key: HBASE-4298
>                 URL: https://issues.apache.org/jira/browse/HBASE-4298
>             Project: HBase
>          Issue Type: Improvement
>          Components: master
>    Affects Versions: 0.90.4
>         Environment: all
>            Reporter: Aravind Gottipati
>            Priority: Critical
>              Labels: patch
>             Fix For: 0.92.0, 0.90.5
>
>         Attachments: 4298-trunk-v2.txt, 90_hbase.patch, drainingservertest-v2.txt, drainingservertest.txt,
trunk_hbase.patch
>
>
> HDFS currently has a way to exclude certain datanodes and prevent them from getting new
blocks.  HDFS goes one step further and even drains these nodes for you.  This enhancement
is a step in that direction.
> The idea is that we mark nodes in zookeeper as draining nodes.  This means that they
don't get any more new regions.  These draining nodes look exactly the same as the corresponding
nodes in /rs, except they live under /draining.
> Eventually, support for draining them can be added.  I am submitting two patches for
review - one for the 0.90 branch and one for trunk (in git).
> Here are the two patches
> 0.90 - https://github.com/aravind/hbase/commit/181041e72e7ffe6a4da6d82b431ef7f8c99e62d2
> trunk - https://github.com/aravind/hbase/commit/e127b25ae3b4034103b185d8380f3b7267bc67d5
> I have tested both these patches and they work as advertised.

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