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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-11765) Fix:Performance regression due to incorrect use of DataChecksum
Date Mon, 08 May 2017 11:00:07 GMT

    [ https://issues.apache.org/jira/browse/HDFS-11765?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16000604#comment-16000604
] 

Hadoop QA commented on HDFS-11765:
----------------------------------

| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  0m 30s{color} | {color:blue}
Docker mode activated. {color} |
| {color:green}+1{color} | {color:green} @author {color} | {color:green}  0m  0s{color} |
{color:green} The patch does not contain any @author tags. {color} |
| {color:red}-1{color} | {color:red} test4tests {color} | {color:red}  0m  0s{color} | {color:red}
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} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 17m 40s{color}
| {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 17m 18s{color} |
{color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 37s{color}
| {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m  5s{color} |
{color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green}  0m 21s{color}
| {color:green} trunk passed {color} |
| {color:red}-1{color} | {color:red} findbugs {color} | {color:red}  1m 26s{color} | {color:red}
hadoop-common-project/hadoop-common in trunk has 19 extant Findbugs warnings. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 50s{color} |
{color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  0m 41s{color}
| {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 15m 24s{color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 15m 24s{color} | {color:green}
the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 36s{color}
| {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m  5s{color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green}  0m 20s{color}
| {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green}  0m  0s{color}
| {color:green} The patch has no whitespace issues. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  1m 34s{color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 51s{color} |
{color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red}  8m 10s{color} | {color:red}
hadoop-common in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 35s{color}
| {color:green} The patch does not generate ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 70m 11s{color} | {color:black}
{color} |
\\
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|| Reason || Tests ||
| Failed junit tests | hadoop.security.TestRaceWhenRelogin |
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|| Subsystem || Report/Notes ||
| Docker |  Image:yetus/hadoop:14b5c93 |
| JIRA Issue | HDFS-11765 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12866863/HDFS-11765.patch
|
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  unit  findbugs
 checkstyle  |
| uname | Linux f48e10de2cf1 3.13.0-116-generic #163-Ubuntu SMP Fri Mar 31 14:13:22 UTC 2017
x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/hadoop/patchprocess/precommit/personality/provided.sh |
| git revision | trunk / a9a3d21 |
| Default Java | 1.8.0_121 |
| findbugs | v3.1.0-RC1 |
| findbugs | https://builds.apache.org/job/PreCommit-HDFS-Build/19346/artifact/patchprocess/branch-findbugs-hadoop-common-project_hadoop-common-warnings.html
|
| unit | https://builds.apache.org/job/PreCommit-HDFS-Build/19346/artifact/patchprocess/patch-unit-hadoop-common-project_hadoop-common.txt
|
|  Test Results | https://builds.apache.org/job/PreCommit-HDFS-Build/19346/testReport/ |
| modules | C: hadoop-common-project/hadoop-common U: hadoop-common-project/hadoop-common
|
| Console output | https://builds.apache.org/job/PreCommit-HDFS-Build/19346/console |
| Powered by | Apache Yetus 0.5.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> Fix:Performance regression due to incorrect use of DataChecksum
> ---------------------------------------------------------------
>
>                 Key: HDFS-11765
>                 URL: https://issues.apache.org/jira/browse/HDFS-11765
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: native, performance
>    Affects Versions: 2.8.0, 3.0.0-alpha1
>            Reporter: LiXin Ge
>             Fix For: 3.0.0-alpha2
>
>         Attachments: HDFS-11765.patch
>
>
> Recently I have upgraded my Hadoop version from 2.6 to 3.0, and I find that the write
performance decreased by 13%. After some days comparative analysis, It's seems introduced
by HADOOP-10865. 
> Since James Thomas have done the work that native checksum can run against byte[] arrays
instead of just against byte buffers, we may use native method preferential because it runs
faster than others.
> [~szetszwo] and [~iwasakims] could you take a look at this to see if  it make bad effect
on your benchmark test? [~tlipcon] could you help to see if I have make mistakes in this patch?
> thanks!



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