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https://issues.apache.org/jira/browse/YARN-8696?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16624248#comment-16624248
 ] 

Hadoop QA commented on YARN-8696:
---------------------------------

| (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:blue}0{color} | {color:blue} findbugs {color} | {color:blue}  0m  
0s{color} | {color:blue} Findbugs executables are not available. {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:brown} branch-2 Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
27s{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 14m 
17s{color} | {color:green} branch-2 passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  7m 
12s{color} | {color:green} branch-2 passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  1m 
 0s{color} | {color:green} branch-2 passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  6m 
34s{color} | {color:green} branch-2 passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  4m 
26s{color} | {color:green} branch-2 passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
14s{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  5m 
36s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  6m 
42s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  6m 
42s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
56s{color} | {color:green} hadoop-yarn-project/hadoop-yarn: The patch generated 
0 new + 232 unchanged - 2 fixed = 232 total (was 234) {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  6m 
23s{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} javadoc {color} | {color:green}  4m  
1s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  0m 
42s{color} | {color:green} hadoop-yarn-api in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  3m 
36s{color} | {color:green} hadoop-yarn-common in the patch passed. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 79m 39s{color} 
| {color:red} hadoop-yarn-server in the patch failed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  2m 
52s{color} | {color:green} hadoop-yarn-server-common in the patch passed. 
{color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 16m  
8s{color} | {color:green} hadoop-yarn-server-nodemanager in the patch passed. 
{color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 70m  
9s{color} | {color:green} hadoop-yarn-server-resourcemanager in the patch 
passed. {color} |
| {color:red}-1{color} | {color:red} asflicense {color} | {color:red}  0m 
40s{color} | {color:red} The patch generated 1 ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black}233m 51s{color} | 
{color:black} {color} |
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|| Subsystem || Report/Notes ||
| Docker | Client=17.05.0-ce Server=17.05.0-ce Image:yetus/hadoop:a716388 |
| JIRA Issue | YARN-8696 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12940811/YARN-8696-branch-2.v6.patch
 |
| Optional Tests |  dupname  asflicense  compile  javac  javadoc  mvninstall  
mvnsite  unit  shadedclient  findbugs  checkstyle  |
| uname | Linux 840a61e355de 4.4.0-133-generic #159-Ubuntu SMP Fri Aug 10 
07:31:43 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/provided.sh |
| git revision | branch-2 / 6056597 |
| maven | version: Apache Maven 3.3.9 
(bb52d8502b132ec0a5a3f4c09453c07478323dc5; 2015-11-10T16:41:47+00:00) |
| Default Java | 1.7.0_181 |
| unit | 
https://builds.apache.org/job/PreCommit-YARN-Build/21930/artifact/out/patch-unit-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-YARN-Build/21930/testReport/ |
| asflicense | 
https://builds.apache.org/job/PreCommit-YARN-Build/21930/artifact/out/patch-asflicense-problems.txt
 |
| Max. process+thread count | 849 (vs. ulimit of 10000) |
| modules | C: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager
 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager
 U: hadoop-yarn-project/hadoop-yarn |
| Console output | 
https://builds.apache.org/job/PreCommit-YARN-Build/21930/console |
| Powered by | Apache Yetus 0.8.0   http://yetus.apache.org |


This message was automatically generated.



> [AMRMProxy] FederationInterceptor upgrade: home sub-cluster heartbeat async
> ---------------------------------------------------------------------------
>
>                 Key: YARN-8696
>                 URL: https://issues.apache.org/jira/browse/YARN-8696
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Botong Huang
>            Assignee: Botong Huang
>            Priority: Major
>         Attachments: YARN-8696-branch-2.v6.patch, YARN-8696.v1.patch, 
> YARN-8696.v2.patch, YARN-8696.v3.patch, YARN-8696.v4.patch, 
> YARN-8696.v5.patch, YARN-8696.v6.patch
>
>
> Today in _FederationInterceptor_, the heartbeat to home sub-cluster is 
> synchronous. After the heartbeat is sent out to home sub-cluster, it waits 
> for the home response to come back before merging and returning the (merged) 
> heartbeat result to back AM. If home sub-cluster is suffering from connection 
> issues, or down during an YarnRM master-slave switch, all heartbeat threads 
> in _FederationInterceptor_ will be blocked waiting for home response. As a 
> result, the successful UAM heartbeats from secondary sub-clusters will not be 
> returned to AM at all. Additionally, because of the fact that we kept the 
> same heartbeat responseId between AM and home RM, lots of tricky handling are 
> needed regarding the responseId resync when it comes to 
> _FederationInterceptor_ (part of AMRMProxy, NM) work preserving restart 
> (YARN-6127, YARN-1336), home RM master-slave switch etc. 
> In this patch, we change the heartbeat to home sub-cluster to asynchronous, 
> same as the way we handle UAM heartbeats in secondaries. So that any 
> sub-cluster down or connection issues won't impact AM getting responses from 
> other sub-clusters. The responseId is also managed separately for home 
> sub-cluster and AM, and they increment independently. The resync logic 
> becomes much cleaner. 



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