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https://issues.apache.org/jira/browse/YARN-4002?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15281264#comment-15281264
 ] 

Hadoop QA commented on YARN-4002:
---------------------------------

| (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 14s 
{color} | {color:blue} Docker mode activated. {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} 8m 
22s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 37s 
{color} | {color:green} trunk passed with JDK v1.8.0_91 {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 36s 
{color} | {color:green} trunk passed with JDK v1.7.0_95 {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 
26s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 0m 42s 
{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 
18s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 1m 
23s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 30s 
{color} | {color:green} trunk passed with JDK v1.8.0_91 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 32s 
{color} | {color:green} trunk passed with JDK v1.7.0_95 {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 0m 
37s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 37s 
{color} | {color:green} the patch passed with JDK v1.8.0_91 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m 37s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 33s 
{color} | {color:green} the patch passed with JDK v1.7.0_95 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m 33s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 
24s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 0m 40s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 
15s {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:green}+1{color} | {color:green} findbugs {color} | {color:green} 1m 
30s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 28s 
{color} | {color:green} the patch passed with JDK v1.8.0_91 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 30s 
{color} | {color:green} the patch passed with JDK v1.7.0_95 {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 35m 18s {color} 
| {color:red} hadoop-yarn-server-resourcemanager in the patch failed with JDK 
v1.8.0_91. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 35m 16s {color} 
| {color:red} hadoop-yarn-server-resourcemanager in the patch failed with JDK 
v1.7.0_95. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m 
22s {color} | {color:green} Patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 91m 22s {color} 
| {color:black} {color} |
\\
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|| Reason || Tests ||
| JDK v1.8.0_91 Failed junit tests | 
hadoop.yarn.server.resourcemanager.TestClientRMTokens |
|   | hadoop.yarn.server.resourcemanager.TestAMAuthorization |
|   | hadoop.yarn.server.resourcemanager.TestRMRestart |
|   | hadoop.yarn.server.resourcemanager.recovery.TestZKRMStateStore |
|   | hadoop.yarn.server.resourcemanager.security.TestDelegationTokenRenewer |
| JDK v1.7.0_95 Failed junit tests | 
hadoop.yarn.server.resourcemanager.TestClientRMTokens |
|   | hadoop.yarn.server.resourcemanager.TestAMAuthorization |
|   | hadoop.yarn.server.resourcemanager.security.TestDelegationTokenRenewer |
|   | hadoop.yarn.server.resourcemanager.TestContainerResourceUsage |
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|| Subsystem || Report/Notes ||
| Docker |  Image:yetus/hadoop:cf2ee45 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12803569/YARN-4002-rwlock-v3-rebase.patch
 |
| JIRA Issue | YARN-4002 |
| Optional Tests |  asflicense  compile  javac  javadoc  mvninstall  mvnsite  
unit  findbugs  checkstyle  |
| uname | Linux 255f5ef244f8 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 | /testptch/hadoop/patchprocess/precommit/personality/provided.sh 
|
| git revision | trunk / d464f4d |
| Default Java | 1.7.0_95 |
| Multi-JDK versions |  /usr/lib/jvm/java-8-oracle:1.8.0_91 
/usr/lib/jvm/java-7-openjdk-amd64:1.7.0_95 |
| findbugs | v3.0.0 |
| unit | 
https://builds.apache.org/job/PreCommit-YARN-Build/11427/artifact/patchprocess/patch-unit-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager-jdk1.8.0_91.txt
 |
| unit | 
https://builds.apache.org/job/PreCommit-YARN-Build/11427/artifact/patchprocess/patch-unit-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager-jdk1.7.0_95.txt
 |
| unit test logs |  
https://builds.apache.org/job/PreCommit-YARN-Build/11427/artifact/patchprocess/patch-unit-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager-jdk1.8.0_91.txt
 
https://builds.apache.org/job/PreCommit-YARN-Build/11427/artifact/patchprocess/patch-unit-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager-jdk1.7.0_95.txt
 |
| JDK v1.7.0_95  Test Results | 
https://builds.apache.org/job/PreCommit-YARN-Build/11427/testReport/ |
| modules | C: 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager
 U: 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager
 |
| Console output | 
https://builds.apache.org/job/PreCommit-YARN-Build/11427/console |
| Powered by | Apache Yetus 0.2.0   http://yetus.apache.org |


This message was automatically generated.



> make ResourceTrackerService.nodeHeartbeat more concurrent
> ---------------------------------------------------------
>
>                 Key: YARN-4002
>                 URL: https://issues.apache.org/jira/browse/YARN-4002
>             Project: Hadoop YARN
>          Issue Type: Improvement
>            Reporter: Hong Zhiguo
>            Assignee: Hong Zhiguo
>            Priority: Critical
>         Attachments: 0001-YARN-4002.patch, YARN-4002-lockless-read.patch, 
> YARN-4002-rwlock-v2.patch, YARN-4002-rwlock-v2.patch, 
> YARN-4002-rwlock-v3-rebase.patch, YARN-4002-rwlock-v3.patch, 
> YARN-4002-rwlock.patch, YARN-4002-v0.patch
>
>
> We have multiple RPC threads to handle NodeHeartbeatRequest from NMs. By 
> design the method ResourceTrackerService.nodeHeartbeat should be concurrent 
> enough to scale for large clusters.
> But we have a "BIG" lock in NodesListManager.isValidNode which I think it's 
> unnecessary.
> First, the fields "includes" and "excludes" of HostsFileReader are only 
> updated on "refresh nodes".  All RPC threads handling node heartbeats are 
> only readers.  So RWLock could be used to  alow concurrent access by RPC 
> threads.
> Second, since he fields "includes" and "excludes" of HostsFileReader are 
> always updated by "reference assignment", which is atomic in Java, the reader 
> side lock could just be skipped.



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