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https://issues.apache.org/jira/browse/HBASE-14643?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14965003#comment-14965003
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Hadoop QA commented on HBASE-14643:
-----------------------------------
{color:green}+1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12767554/HBASE-14643_v5.patch
against master branch at commit c9523a569d45e9edc2c2d7b8d4d9cbf05f46a100.
ATTACHMENT ID: 12767554
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:green}+1 tests included{color}. The patch appears to include 4 new
or modified tests.
{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 increase the
total number of 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 .
Test results:
https://builds.apache.org/job/PreCommit-HBASE-Build/16115//testReport/
Release Findbugs (version 2.0.3) warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/16115//artifact/patchprocess/newFindbugsWarnings.html
Checkstyle Errors:
https://builds.apache.org/job/PreCommit-HBASE-Build/16115//artifact/patchprocess/checkstyle-aggregate.html
Console output:
https://builds.apache.org/job/PreCommit-HBASE-Build/16115//console
This message is automatically generated.
> Avoid Splits from once again opening a closed reader for fetching the first
> and last key
> ----------------------------------------------------------------------------------------
>
> Key: HBASE-14643
> URL: https://issues.apache.org/jira/browse/HBASE-14643
> Project: HBase
> Issue Type: Improvement
> Components: regionserver
> Affects Versions: 2.0.0
> Reporter: ramkrishna.s.vasudevan
> Assignee: Heng Chen
> Attachments: HBASE-14643.patch, HBASE-14643_v1.patch,
> HBASE-14643_v2.patch, HBASE-14643_v3.patch, HBASE-14643_v4.patch,
> HBASE-14643_v5.patch
>
>
> Currently split flow is such that we close the parent region and all its
> store file readers are also closed. After that inorder to split the
> reference files we need the first and last keys for which once again open the
> readers on those store files. This could be costlier operation considering
> the fact that it has to contact the HDFS for this close and open operation.
> This JIRA is to see if we can improve this.
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