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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14791) Batch Deletes in MapReduce jobs (0.98)
Date Wed, 18 Nov 2015 00:55:10 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14791?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15009962#comment-15009962
] 

Hadoop QA commented on HBASE-14791:
-----------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12772837/HBASE-14791-0.98.patch
  against 0.98 branch at commit dadfe7da0484be81ae09ad61f976967b9893c38d.
  ATTACHMENT ID: 12772837

    {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:red}-1 javadoc{color}.  The javadoc tool appears to have generated 28 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/16556//testReport/
Release Findbugs (version 2.0.3) 	warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/16556//artifact/patchprocess/newFindbugsWarnings.html
Checkstyle Errors: https://builds.apache.org/job/PreCommit-HBASE-Build/16556//artifact/patchprocess/checkstyle-aggregate.html

  Javadoc warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/16556//artifact/patchprocess/patchJavadocWarnings.txt
Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/16556//console

This message is automatically generated.

> Batch Deletes in MapReduce jobs (0.98)
> --------------------------------------
>
>                 Key: HBASE-14791
>                 URL: https://issues.apache.org/jira/browse/HBASE-14791
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.98.16
>            Reporter: Lars Hofhansl
>            Assignee: Alex Araujo
>              Labels: mapreduce
>             Fix For: 0.98.17
>
>         Attachments: HBASE-14791-0.98-v1.patch, HBASE-14791-0.98-v2.patch, HBASE-14791-0.98.patch
>
>
> We found that some of our copy table job run for many hours, even when there isn't that
much data to copy.
> [~vik.karma] did his magic and found that the issue is with copying delete markers (we
use raw mode to also move deletes across).
> Looking at the code in 0.98 it's immediately obvious that deletes (unlike puts) are not
batched and hence sent to the other side one by one, causing a network RTT for each delete
marker.
> Looks like in trunk it's doing the right thing (using BufferedMutators for all mutations
in TableOutputFormat). So likely only a 0.98 (and 1.0, 1.1, 1.2?) issue.



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