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https://issues.apache.org/jira/browse/YARN-4353?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15005961#comment-15005961
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Hadoop QA commented on YARN-4353:
---------------------------------

| (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: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} 3m 
40s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 29s 
{color} | {color:green} trunk passed with JDK v1.8.0_60 {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 25s 
{color} | {color:green} trunk passed with JDK v1.7.0_79 {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 
12s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 0m 26s 
{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 
15s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 1m 2s 
{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 23s 
{color} | {color:green} trunk passed with JDK v1.8.0_60 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 25s 
{color} | {color:green} trunk passed with JDK v1.7.0_79 {color} |
| {color:red}-1{color} | {color:red} mvninstall {color} | {color:red} 0m 17s 
{color} | {color:red} hadoop-yarn-server-nodemanager in the patch failed. 
{color} |
| {color:red}-1{color} | {color:red} compile {color} | {color:red} 0m 15s 
{color} | {color:red} hadoop-yarn-server-nodemanager in the patch failed with 
JDK v1.8.0_60. {color} |
| {color:red}-1{color} | {color:red} javac {color} | {color:red} 0m 15s {color} 
| {color:red} hadoop-yarn-server-nodemanager in the patch failed with JDK 
v1.8.0_60. {color} |
| {color:red}-1{color} | {color:red} compile {color} | {color:red} 0m 18s 
{color} | {color:red} hadoop-yarn-server-nodemanager in the patch failed with 
JDK v1.7.0_79. {color} |
| {color:red}-1{color} | {color:red} javac {color} | {color:red} 0m 18s {color} 
| {color:red} hadoop-yarn-server-nodemanager in the patch failed with JDK 
v1.7.0_79. {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 
11s {color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} mvnsite {color} | {color:red} 0m 21s 
{color} | {color:red} hadoop-yarn-server-nodemanager in the patch failed. 
{color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 
13s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green} 0m 
0s {color} | {color:green} Patch has no whitespace issues. {color} |
| {color:red}-1{color} | {color:red} findbugs {color} | {color:red} 0m 17s 
{color} | {color:red} hadoop-yarn-server-nodemanager in the patch failed. 
{color} |
| {color:red}-1{color} | {color:red} javadoc {color} | {color:red} 0m 58s 
{color} | {color:red} 
hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-nodemanager-jdk1.8.0_60
 with JDK v1.8.0_60 generated 1 new issues (was 100, now 100). {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 21s 
{color} | {color:green} the patch passed with JDK v1.8.0_60 {color} |
| {color:red}-1{color} | {color:red} javadoc {color} | {color:red} 1m 47s 
{color} | {color:red} 
hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-nodemanager-jdk1.7.0_79
 with JDK v1.7.0_79 generated 1 new issues (was 1, now 2). {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 24s 
{color} | {color:green} the patch passed with JDK v1.7.0_79 {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 0m 16s {color} 
| {color:red} hadoop-yarn-server-nodemanager in the patch failed with JDK 
v1.8.0_60. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 0m 17s {color} 
| {color:red} hadoop-yarn-server-nodemanager 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} 12m 0s {color} | 
{color:black} {color} |
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|| Subsystem || Report/Notes ||
| Docker | Client=1.7.1 Server=1.7.1 
Image:test-patch-base-hadoop-date2015-11-15 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12772411/YARN-4353.prelim.patch
 |
| JIRA Issue | YARN-4353 |
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  
unit  findbugs  checkstyle  |
| uname | Linux 4bf0bce1fd21 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-YARN-Build/patchprocess/apache-yetus-fa12328/precommit/personality/hadoop.sh
 |
| git revision | trunk / 855d529 |
| findbugs | v3.0.0 |
| mvninstall | 
https://builds.apache.org/job/PreCommit-YARN-Build/9692/artifact/patchprocess/patch-mvninstall-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-nodemanager.txt
 |
| compile | 
https://builds.apache.org/job/PreCommit-YARN-Build/9692/artifact/patchprocess/patch-compile-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-nodemanager-jdk1.8.0_60.txt
 |
| javac | 
https://builds.apache.org/job/PreCommit-YARN-Build/9692/artifact/patchprocess/patch-compile-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-nodemanager-jdk1.8.0_60.txt
 |
| compile | 
https://builds.apache.org/job/PreCommit-YARN-Build/9692/artifact/patchprocess/patch-compile-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-nodemanager-jdk1.7.0_79.txt
 |
| javac | 
https://builds.apache.org/job/PreCommit-YARN-Build/9692/artifact/patchprocess/patch-compile-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-nodemanager-jdk1.7.0_79.txt
 |
| mvnsite | 
https://builds.apache.org/job/PreCommit-YARN-Build/9692/artifact/patchprocess/patch-mvnsite-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-nodemanager.txt
 |
| findbugs | 
https://builds.apache.org/job/PreCommit-YARN-Build/9692/artifact/patchprocess/patch-findbugs-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-nodemanager.txt
 |
| javadoc | 
hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-nodemanager-jdk1.8.0_60:
 
https://builds.apache.org/job/PreCommit-YARN-Build/9692/artifact/patchprocess/diff-javadoc-javadoc-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-nodemanager-jdk1.8.0_60.txt
 |
| javadoc | 
hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-nodemanager-jdk1.7.0_79:
 
https://builds.apache.org/job/PreCommit-YARN-Build/9692/artifact/patchprocess/diff-javadoc-javadoc-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-nodemanager-jdk1.7.0_79.txt
 |
| unit | 
https://builds.apache.org/job/PreCommit-YARN-Build/9692/artifact/patchprocess/patch-unit-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-nodemanager-jdk1.8.0_60.txt
 |
| unit | 
https://builds.apache.org/job/PreCommit-YARN-Build/9692/artifact/patchprocess/patch-unit-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-nodemanager-jdk1.7.0_79.txt
 |
| JDK v1.7.0_79  Test Results | 
https://builds.apache.org/job/PreCommit-YARN-Build/9692/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
 |
| Max memory used | 229MB |
| Powered by | Apache Yetus   http://yetus.apache.org |
| Console output | 
https://builds.apache.org/job/PreCommit-YARN-Build/9692/console |


This message was automatically generated.



> Provide short circuit user group mapping for NM/AM
> --------------------------------------------------
>
>                 Key: YARN-4353
>                 URL: https://issues.apache.org/jira/browse/YARN-4353
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: nodemanager
>    Affects Versions: 2.7.1
>            Reporter: Daniel Templeton
>            Assignee: Daniel Templeton
>         Attachments: YARN-4353.prelim.patch
>
>
> When the NM launches an AM, the {{ContainerLocalizer}} gets the current user 
> from {{UserGroupInformation}}, which triggers user group mapping, even though 
> the user groups are never accessed.  If secure LDAP is configured for group 
> mapping, then there are some additional complications created by the 
> unnecessary group resolution.  Additionally, it adds unnecessary latency to 
> the container launch time.
> To address the issue, before getting the current user, the 
> {{ContainerLocalizer}} should configure {{UserGroupInformation}} with a null 
> group mapping service that quickly and quietly returns an empty group list 
> for all users.



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