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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-9534) Short-Circuit Coprocessor HTable access when on the same server
Date Wed, 18 Sep 2013 08:50:54 GMT

    [ https://issues.apache.org/jira/browse/HBASE-9534?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13770577#comment-13770577
] 

Hadoop QA commented on HBASE-9534:
----------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12603762/9534-trunk.txt
  against trunk revision .

    {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 hadoop1.0{color}.  The patch compiles against the hadoop 1.0 profile.

    {color:green}+1 hadoop2.0{color}.  The patch compiles against the hadoop 2.0 profile.

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any warning messages.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version
1.3.9) 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 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/7288//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7288//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-protocol.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7288//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-client.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7288//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-examples.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7288//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop1-compat.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7288//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-prefix-tree.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7288//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-common.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7288//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-server.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7288//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop-compat.html
Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/7288//console

This message is automatically generated.
                
> Short-Circuit Coprocessor HTable access when on the same server
> ---------------------------------------------------------------
>
>                 Key: HBASE-9534
>                 URL: https://issues.apache.org/jira/browse/HBASE-9534
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Jesse Yates
>            Assignee: Jesse Yates
>              Labels: coprocessors, performance, regionserver
>             Fix For: 0.98.0, 0.94.12, 0.96.1
>
>         Attachments: 9534-0.94.txt, 9534-trunk.txt, hbase-9534-0.94-v0.patch, hbase-9534-0.94-v1.patch,
hbase-9534-trunk-v0.patch, hbase-9534-trunk-v1.patch, hbase-9534-trunk-v2.patch
>
>
> Coprocessors currently create a full HTable when they want to write. However, we know
that coprocessors must run from within an HBase server (either master or RS). For the master,
its rare that we are going to be doing performance sensitive operations, but RS calls could
be very time-intensive. 
> Therefore, we should be able to tell when a call from a CP attempts to talk to the RS
on which it lives and just short-circuit to calling that RS, rather than going the long way
around (which does the full marshalling/unmarshalling of data, as well as going over the loopback
interface).

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