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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-6999) Add log about how to solve Error: Could not find or load main class org.apache.hadoop.mapreduce.v2.app.MRAppMaster
Date Fri, 18 Aug 2017 05:28:01 GMT

    [ https://issues.apache.org/jira/browse/YARN-6999?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16131740#comment-16131740
] 

Hadoop QA commented on YARN-6999:
---------------------------------

| (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 19s{color} | {color:blue}
Docker mode activated. {color} |
|| || || || {color:brown} Prechecks {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:brown} trunk Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 13m 57s{color}
| {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 41s{color} |
{color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 19s{color}
| {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 29s{color} |
{color:green} trunk passed {color} |
| {color:red}-1{color} | {color:red} findbugs {color} | {color:red}  0m 44s{color} | {color:red}
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager in trunk
has 1 extant Findbugs warnings. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 18s{color} |
{color:green} trunk passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  0m 25s{color}
| {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 39s{color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 39s{color} | {color:green}
the patch passed {color} |
| {color:orange}-0{color} | {color:orange} checkstyle {color} | {color:orange}  0m 16s{color}
| {color:orange} hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager:
The patch generated 11 new + 41 unchanged - 1 fixed = 52 total (was 42) {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 25s{color} |
{color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} whitespace {color} | {color:red}  0m  0s{color} | {color:red}
The patch 11 line(s) with tabs. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  0m 48s{color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 15s{color} |
{color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 13m 26s{color} | {color:green}
hadoop-yarn-server-nodemanager in the patch passed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 13s{color}
| {color:green} The patch does not generate ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 34m 28s{color} | {color:black}
{color} |
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|| Subsystem || Report/Notes ||
| Docker |  Image:yetus/hadoop:14b5c93 |
| JIRA Issue | YARN-6999 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12881624/yarn-6999.patch
|
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  unit  findbugs
 checkstyle  |
| uname | Linux c584249b493a 3.13.0-119-generic #166-Ubuntu SMP Wed May 3 12:18:55 UTC 2017
x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/hadoop/patchprocess/precommit/personality/provided.sh |
| git revision | trunk / 99e558b |
| Default Java | 1.8.0_144 |
| findbugs | v3.1.0-RC1 |
| findbugs | https://builds.apache.org/job/PreCommit-YARN-Build/16982/artifact/patchprocess/branch-findbugs-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-nodemanager-warnings.html
|
| checkstyle | https://builds.apache.org/job/PreCommit-YARN-Build/16982/artifact/patchprocess/diff-checkstyle-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-nodemanager.txt
|
| whitespace | https://builds.apache.org/job/PreCommit-YARN-Build/16982/artifact/patchprocess/whitespace-tabs.txt
|
|  Test Results | https://builds.apache.org/job/PreCommit-YARN-Build/16982/testReport/ |
| modules | C: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager
U: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager |
| Console output | https://builds.apache.org/job/PreCommit-YARN-Build/16982/console |
| Powered by | Apache Yetus 0.6.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> Add log about how to solve Error: Could not find or load main class org.apache.hadoop.mapreduce.v2.app.MRAppMaster
> ------------------------------------------------------------------------------------------------------------------
>
>                 Key: YARN-6999
>                 URL: https://issues.apache.org/jira/browse/YARN-6999
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: documentation, security
>    Affects Versions: 3.0.0-beta1
>         Environment: All operating systems.
>            Reporter: Linlin Zhou
>            Assignee: Linlin Zhou
>            Priority: Minor
>              Labels: beginner
>             Fix For: 3.0.0-beta1
>
>         Attachments: yarn-6999.patch
>
>   Original Estimate: 1h
>  Remaining Estimate: 1h
>
> According Setting up a Single Node Cluster [https://hadoop.apache.org/docs/stable/hadoop-project-dist/hadoop-common/SingleCluster.html],
we would still failed to run the MapReduce job example. Due to a security fix, yarn use user's
environment variables to init, and user's environment variable usually doesn't include MapReduce
related settings. So we need to add the related config in etc/hadoop/mapred-site.xml manually.
Currently the log only tells there is an Error:
> Could not find or load main class org.apache.hadoop.mapreduce.v2.app.MRAppMaster, without
suggestion on how to solve it. I want to add the useful suggestion in log.



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