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https://issues.apache.org/jira/browse/HBASE-14838?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15045941#comment-15045941
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Hadoop QA commented on HBASE-14838:
-----------------------------------
{color:red}-1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12776141/HBASE-14838.patch
against master branch at commit 8bf70144e40650ef972f005e2465bd0e2a087c40.
ATTACHMENT ID: 12776141
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:red}-1 tests included{color}. The patch doesn't appear to include
any new or modified tests.
Please justify why no new tests are needed for this
patch.
Also please list what manual steps were performed to
verify this patch.
{color:green}+1 hadoop versions{color}. The patch compiles with all
supported hadoop versions (2.4.0 2.4.1 2.5.0 2.5.1 2.5.2 2.6.0 2.6.1 2.7.0
2.7.1)
{color:green}+1 javac{color}. The applied patch does not increase the
total number of javac compiler warnings.
{color:green}+1 protoc{color}. The applied patch does not increase the
total number of protoc compiler warnings.
{color:green}+1 javadoc{color}. The javadoc tool did not generate any
warning messages.
{color:green}+1 checkstyle{color}. The applied patch does not generate new
checkstyle errors.
{color:green}+1 findbugs{color}. The patch does not introduce any new
Findbugs (version 2.0.3) warnings.
{color:green}+1 release audit{color}. The applied patch does not increase
the total number of release audit warnings.
{color:green}+1 lineLengths{color}. The patch does not introduce lines
longer than 100
{color:green}+1 site{color}. The mvn post-site goal succeeds with this
patch.
{color:green}+1 core tests{color}. The patch passed unit tests in .
{color:green}+1 zombies{color}. No zombie tests found running at the end of
the build.
Test results:
https://builds.apache.org/job/PreCommit-HBASE-Build/16783//testReport/
Release Findbugs (version 2.0.3) warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/16783//artifact/patchprocess/newFindbugsWarnings.html
Checkstyle Errors:
https://builds.apache.org/job/PreCommit-HBASE-Build/16783//artifact/patchprocess/checkstyle-aggregate.html
Console output:
https://builds.apache.org/job/PreCommit-HBASE-Build/16783//console
This message is automatically generated.
> Clarify that SimpleRegionNormalizer does not merge empty (<1MB) regions
> -----------------------------------------------------------------------
>
> Key: HBASE-14838
> URL: https://issues.apache.org/jira/browse/HBASE-14838
> Project: HBase
> Issue Type: Bug
> Affects Versions: 1.2.0
> Reporter: Romil Choksi
> Assignee: Josh Elser
> Priority: Trivial
> Fix For: 2.0.0, 1.2.0
>
> Attachments: HBASE-14838.patch
>
>
> SImpleRegionNormalizer does not merge empty region of a table
> Steps to repro:
> - Create an empty table with few, say 5-6 regions without any data in any of
> them
> - Verify hbase:meta table to verify the regions for the table or check
> HMaster UI
> - Enable normalizer switch and normalization for this table
> - Run normalizer, by 'normalize' command from hbase shell
> - Verify the regions for table by scanning hbase:meta table or checking
> HMaster web UI
> The empty regions are not merged on running the region normalizer. This seems
> to be an edge case with completely empty regions since the Normalizer checks
> for: smallestRegion (in this case 0 size) + smallestNeighborOfSmallestRegion
> (in this case 0 size) > avg region size (in this case 0 size)
> thanks to [~elserj] for verifying this from the source code side
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