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https://issues.apache.org/jira/browse/YARN-8763?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16609972#comment-16609972
 ] 

Hadoop QA commented on YARN-8763:
---------------------------------

| (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 
17s{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} 19m 
38s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m  
0s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
25s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 
39s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
12m 18s{color} | {color:green} branch has no errors when building and testing 
our client artifacts. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  0m 
54s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
25s{color} | {color:green} trunk passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:red}-1{color} | {color:red} mvninstall {color} | {color:red}  0m 
42s{color} | {color:red} hadoop-yarn-server-nodemanager in the patch failed. 
{color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
57s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 
57s{color} | {color:green} the patch passed {color} |
| {color:orange}-0{color} | {color:orange} checkstyle {color} | {color:orange}  
0m 22s{color} | {color:orange} 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager:
 The patch generated 6 new + 2 unchanged - 0 fixed = 8 total (was 2) {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 
34s{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} xml {color} | {color:green}  0m  
2s{color} | {color:green} The patch has no ill-formed XML file. {color} |
| {color:red}-1{color} | {color:red} shadedclient {color} | {color:red}  4m 
21s{color} | {color:red} patch has errors when building and testing our client 
artifacts. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  0m 
59s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
22s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 20m 12s{color} 
| {color:red} hadoop-yarn-server-nodemanager in the patch failed. {color} |
| {color:red}-1{color} | {color:red} asflicense {color} | {color:red}  0m 
28s{color} | {color:red} The patch generated 3 ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 64m 33s{color} | 
{color:black} {color} |
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|| Reason || Tests ||
| Failed junit tests | hadoop.yarn.server.nodemanager.TestNodeManagerReboot |
|   | 
hadoop.yarn.server.nodemanager.containermanager.resourceplugin.TestResourcePluginManager
 |
|   | hadoop.yarn.server.nodemanager.TestNodeManagerResync |
|   | hadoop.yarn.server.nodemanager.TestNodeStatusUpdater |
|   | hadoop.yarn.server.nodemanager.webapp.TestNMWebServer |
|   | hadoop.yarn.server.nodemanager.TestNodeStatusUpdaterForLabels |
|   | hadoop.yarn.server.nodemanager.TestNodeManagerShutdown |
\\
\\
|| Subsystem || Report/Notes ||
| Docker | Client=17.05.0-ce Server=17.05.0-ce Image:yetus/hadoop:ba1ab08 |
| JIRA Issue | YARN-8763 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12939182/YARN-8763-001.patch |
| Optional Tests |  dupname  asflicense  compile  javac  javadoc  mvninstall  
mvnsite  unit  shadedclient  xml  findbugs  checkstyle  |
| uname | Linux 426501e557fc 3.13.0-153-generic #203-Ubuntu SMP Thu Jun 14 
08:52:28 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/provided.sh |
| git revision | trunk / 987d819 |
| maven | version: Apache Maven 3.3.9 |
| Default Java | 1.8.0_181 |
| findbugs | v3.1.0-RC1 |
| mvninstall | 
https://builds.apache.org/job/PreCommit-YARN-Build/21805/artifact/out/patch-mvninstall-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-nodemanager.txt
 |
| checkstyle | 
https://builds.apache.org/job/PreCommit-YARN-Build/21805/artifact/out/diff-checkstyle-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-nodemanager.txt
 |
| unit | 
https://builds.apache.org/job/PreCommit-YARN-Build/21805/artifact/out/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/21805/testReport/ |
| asflicense | 
https://builds.apache.org/job/PreCommit-YARN-Build/21805/artifact/out/patch-asflicense-problems.txt
 |
| Max. process+thread count | 302 (vs. ulimit of 10000) |
| 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/21805/console |
| Powered by | Apache Yetus 0.8.0   http://yetus.apache.org |


This message was automatically generated.



> Add WebSocket logic to the Node Manager web server to establish servlet
> -----------------------------------------------------------------------
>
>                 Key: YARN-8763
>                 URL: https://issues.apache.org/jira/browse/YARN-8763
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Zian Chen
>            Assignee: Zian Chen
>            Priority: Major
>              Labels: Docker
>         Attachments: YARN-8763-001.patch
>
>
> The reason we want to use WebSocket servlet to serve the backend instead of 
> establishing the connection through HTTP is that WebSocket solves a few 
> issues with HTTP which needed for our scenario,
>  # In HTTP, the request is always initiated by the client and the response is 
> processed by the server — making HTTP a unidirectional protocol, while web 
> socket provides the Bi-directional protocol which means either client/server 
> can send a message to the other party.
>  # Full-duplex communication — client and server can talk to each other 
> independently at the same time
>  # Single TCP connection — After upgrading the HTTP connection in the 
> beginning, client and server communicate over that same TCP connection 
> throughout the lifecycle of WebSocket connection



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