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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-12041) Implement another Reed-Solomon coder in pure Java
Date Mon, 02 Nov 2015 04:21:28 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-12041?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14984725#comment-14984725
] 

Hadoop QA commented on HADOOP-12041:
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| (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 7s {color} | {color:blue}
docker + precommit patch detected. {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:green}+1{color} | {color:green} test4tests {color} | {color:green} 0m 0s {color}
| {color:green} The patch appears to include 4 new or modified test files. {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 3m 39s {color}
| {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 5m 10s {color} |
{color:green} trunk passed with JDK v1.8.0_60 {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 4m 41s {color} |
{color:green} trunk passed with JDK v1.7.0_79 {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 16s {color}
| {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 13s {color}
| {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 1m 59s {color} |
{color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m 4s {color} | {color:green}
trunk passed with JDK v1.8.0_60 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m 16s {color} |
{color:green} trunk passed with JDK v1.7.0_79 {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 1m 33s {color}
| {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 5m 12s {color} |
{color:green} the patch passed with JDK v1.8.0_60 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 5m 12s {color} | {color:green}
the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 4m 50s {color} |
{color:green} the patch passed with JDK v1.7.0_79 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 4m 50s {color} | {color:green}
the patch passed {color} |
| {color:red}-1{color} | {color:red} checkstyle {color} | {color:red} 0m 16s {color} | {color:red}
Patch generated 17 new checkstyle issues in hadoop-common-project/hadoop-common (total was
4, now 21). {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 15s {color}
| {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} whitespace {color} | {color:red} 0m 0s {color} | {color:red}
The patch has 1 line(s) that end in whitespace. Use git apply --whitespace=fix. {color} |
| {color:red}-1{color} | {color:red} whitespace {color} | {color:red} 0m 0s {color} | {color:red}
The patch has 4 line(s) with tabs. {color} |
| {color:red}-1{color} | {color:red} findbugs {color} | {color:red} 2m 7s {color} | {color:red}
hadoop-common-project/hadoop-common introduced 1 new FindBugs issues. {color} |
| {color:red}-1{color} | {color:red} javadoc {color} | {color:red} 3m 31s {color} | {color:red}
hadoop-common-project_hadoop-common-jdk1.8.0_60 with JDK v1.8.0_60 has problems. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m 1s {color} | {color:green}
the patch passed with JDK v1.8.0_60 {color} |
| {color:red}-1{color} | {color:red} javadoc {color} | {color:red} 5m 8s {color} | {color:red}
hadoop-common-project_hadoop-common-jdk1.7.0_79 with JDK v1.7.0_79 has problems. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m 15s {color} |
{color:green} the patch passed with JDK v1.7.0_79 {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 8m 31s {color} | {color:green}
hadoop-common in the patch passed with JDK v1.8.0_60. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 7m 51s {color} | {color:red}
hadoop-common in the patch failed with JDK v1.7.0_79. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m 25s {color}
| {color:green} Patch does not generate ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 52m 51s {color} | {color:black}
{color} |
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|| Reason || Tests ||
| FindBugs | module:hadoop-common-project/hadoop-common |
|  |  Synchronization on Boolean in org.apache.hadoop.io.erasurecode.rawcoder.util.GF256.init()
 At GF256.java: At GF256.java:[line 145] |
| JDK v1.7.0_79 Failed junit tests | hadoop.ipc.TestDecayRpcScheduler |
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|| Subsystem || Report/Notes ||
| Docker | Client=1.7.1 Server=1.7.1 Image:test-patch-base-hadoop-date2015-11-02 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12770024/HADOOP-12041-v2.patch
|
| JIRA Issue | HADOOP-12041 |
| Optional Tests |  asflicense  javac  javadoc  mvninstall  unit  findbugs  checkstyle  compile
 |
| uname | Linux 290c2e82b4a2 3.13.0-36-lowlatency #63-Ubuntu SMP PREEMPT Wed Sep 3 21:56:12
UTC 2014 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /home/jenkins/jenkins-slave/workspace/PreCommit-HADOOP-Build/patchprocess/apache-yetus-e77b1ce/precommit/personality/hadoop.sh
|
| git revision | trunk / 6e4f8a4 |
| Default Java | 1.7.0_79 |
| Multi-JDK versions |  /usr/lib/jvm/java-8-oracle:1.8.0_60 /usr/lib/jvm/java-7-openjdk-amd64:1.7.0_79
|
| findbugs | v3.0.0 |
| checkstyle | https://builds.apache.org/job/PreCommit-HADOOP-Build/7996/artifact/patchprocess/diff-checkstyle-hadoop-common-project_hadoop-common.txt
|
| whitespace | https://builds.apache.org/job/PreCommit-HADOOP-Build/7996/artifact/patchprocess/whitespace-eol.txt
|
| whitespace | https://builds.apache.org/job/PreCommit-HADOOP-Build/7996/artifact/patchprocess/whitespace-tabs.txt
|
| findbugs | https://builds.apache.org/job/PreCommit-HADOOP-Build/7996/artifact/patchprocess/new-findbugs-hadoop-common-project_hadoop-common.html
|
| javadoc | hadoop-common-project_hadoop-common-jdk1.8.0_60: https://builds.apache.org/job/PreCommit-HADOOP-Build/7996/artifact/patchprocess/javadoc-hadoop-common-project_hadoop-common-jdk1.8.0_60-diff.txt
|
| javadoc | hadoop-common-project_hadoop-common-jdk1.7.0_79: https://builds.apache.org/job/PreCommit-HADOOP-Build/7996/artifact/patchprocess/javadoc-hadoop-common-project_hadoop-common-jdk1.7.0_79-diff.txt
|
| unit | https://builds.apache.org/job/PreCommit-HADOOP-Build/7996/artifact/patchprocess/patch-unit-hadoop-common-project_hadoop-common-jdk1.7.0_79.txt
|
| unit test logs |  https://builds.apache.org/job/PreCommit-HADOOP-Build/7996/artifact/patchprocess/patch-unit-hadoop-common-project_hadoop-common-jdk1.7.0_79.txt
|
| JDK v1.7.0_79  Test Results | https://builds.apache.org/job/PreCommit-HADOOP-Build/7996/testReport/
|
| modules | C: hadoop-common-project/hadoop-common U: hadoop-common-project/hadoop-common
|
| Max memory used | 227MB |
| Powered by | Apache Yetus   http://yetus.apache.org |
| Console output | https://builds.apache.org/job/PreCommit-HADOOP-Build/7996/console |


This message was automatically generated.



> Implement another Reed-Solomon coder in pure Java
> -------------------------------------------------
>
>                 Key: HADOOP-12041
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12041
>             Project: Hadoop Common
>          Issue Type: Sub-task
>            Reporter: Kai Zheng
>            Assignee: Kai Zheng
>         Attachments: HADOOP-12041-v1.patch, HADOOP-12041-v2.patch
>
>
> Currently existing Java RS coders based on {{GaloisField}} implementation have some drawbacks
or limitations:
> * The decoder computes not really erased units unnecessarily (HADOOP-11871);
> * The decoder requires parity units + data units order for the inputs in the decode API
(HADOOP-12040);
> * Need to support or align with native erasure coders regarding concrete coding algorithms
and matrix, so Java coders and native coders can be easily swapped in/out and transparent
to HDFS (HADOOP-12010);
> * It's unnecessarily flexible but incurs some overhead, as HDFS erasure coding is totally
a byte based data system, we don't need to consider other symbol size instead of 256.
> This desires to implement another  RS coder in pure Java, in addition to the existing
{{GaliosField}} from HDFS-RAID. The new Java RS coder will be favored and used by default
to resolve the related issues. The old HDFS-RAID originated coder will still be there for
comparing, and converting old data from HDFS-RAID systems.



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