[ 
https://issues.apache.org/jira/browse/YARN-6999?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16140488#comment-16140488
 ] 

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 
25s{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} 17m 
33s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m 
11s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
31s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 
44s{color} | {color:green} trunk passed {color} |
| {color:red}-1{color} | {color:red} findbugs {color} | {color:red}  1m  
2s{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 
26s{color} | {color:green} trunk passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  0m 
36s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
55s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 
55s{color} | {color:green} the patch passed {color} |
| {color:orange}-0{color} | {color:orange} checkstyle {color} | {color:orange}  
0m 21s{color} | {color:orange} 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager:
 The patch generated 6 new + 42 unchanged - 0 fixed = 48 total (was 42) {color} 
|
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 
34s{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 <<patch_file>>. Refer https://git-scm.com/docs/git-apply 
{color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  1m  
4s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
23s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 15m 39s{color} 
| {color:red} hadoop-yarn-server-nodemanager in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
21s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 43m 28s{color} | 
{color:black} {color} |
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|| Reason || Tests ||
| Failed junit tests | 
hadoop.yarn.server.nodemanager.containermanager.logaggregation.TestLogAggregationService
 |
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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/12883567/yarn-6999.002.patch |
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  
unit  findbugs  checkstyle  |
| uname | Linux 9d498ee3a4a5 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 / 8196a07 |
| Default Java | 1.8.0_144 |
| findbugs | v3.1.0-RC1 |
| findbugs | 
https://builds.apache.org/job/PreCommit-YARN-Build/17116/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/17116/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/17116/artifact/patchprocess/whitespace-eol.txt
 |
| unit | 
https://builds.apache.org/job/PreCommit-YARN-Build/17116/artifact/patchprocess/patch-unit-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-nodemanager.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-YARN-Build/17116/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/17116/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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