[ 
https://issues.apache.org/jira/browse/YARN-7721?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16811816#comment-16811816
 ] 

Hadoop QA commented on YARN-7721:
---------------------------------

| (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:green}+1{color} | {color:green} test4tests {color} | {color:green}  0m 
 0s{color} | {color:green} The patch appears to include 1 new or modified test 
files. {color} |
|| || || || {color:brown} trunk Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 18m 
22s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
46s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
37s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 
49s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
11m 41s{color} | {color:green} branch has no errors when building and testing 
our client artifacts. {color} |
| {color:red}-1{color} | {color:red} findbugs {color} | {color:red}  1m 
18s{color} | {color:red} 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager
 in trunk has 2 extant Findbugs warnings. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
28s{color} | {color:green} trunk passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  0m 
41s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
39s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 
39s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
31s{color} | {color:green} 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager:
 The patch generated 0 new + 2 unchanged - 1 fixed = 2 total (was 3) {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 
43s{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} shadedclient {color} | {color:green} 
11m 55s{color} | {color:green} patch has no errors when building and testing 
our client artifacts. {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 
26s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 77m 
23s{color} | {color:green} hadoop-yarn-server-resourcemanager in the patch 
passed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
28s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black}128m 11s{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:8f97d6f |
| JIRA Issue | YARN-7721 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12945331/YARN-7721.001.patch |
| Optional Tests |  dupname  asflicense  compile  javac  javadoc  mvninstall  
mvnsite  unit  shadedclient  findbugs  checkstyle  |
| uname | Linux 77effa19d583 4.4.0-138-generic #164-Ubuntu SMP Tue Oct 2 
17:16:02 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/provided.sh |
| git revision | trunk / ec143cb |
| maven | version: Apache Maven 3.3.9 |
| Default Java | 1.8.0_191 |
| findbugs | v3.1.0-RC1 |
| findbugs | 
https://builds.apache.org/job/PreCommit-YARN-Build/23907/artifact/out/branch-findbugs-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager-warnings.html
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-YARN-Build/23907/testReport/ |
| Max. process+thread count | 891 (vs. ulimit of 10000) |
| 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/23907/console |
| Powered by | Apache Yetus 0.8.0   http://yetus.apache.org |


This message was automatically generated.



> TestContinuousScheduling fails sporadically with NPE
> ----------------------------------------------------
>
>                 Key: YARN-7721
>                 URL: https://issues.apache.org/jira/browse/YARN-7721
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: fairscheduler
>    Affects Versions: 3.1.0
>            Reporter: Jason Lowe
>            Assignee: Wilfred Spiegelenburg
>            Priority: Major
>         Attachments: YARN-7721.001.patch
>
>
> TestContinuousScheduling#testFairSchedulerContinuousSchedulingInitTime is 
> failing sporadically with an NPE in precommit builds, and I can usually 
> reproduce it locally after a few tries:
> {noformat}
> [ERROR] 
> testFairSchedulerContinuousSchedulingInitTime(org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.TestContinuousScheduling)
>   Time elapsed: 0.085 s  <<< ERROR!
> java.lang.NullPointerException
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.TestContinuousScheduling.testFairSchedulerContinuousSchedulingInitTime(TestContinuousScheduling.java:383)
>       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>       at 
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>       at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>       at java.lang.reflect.Method.invoke(Method.java:497)
>       at 
> org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
> [...]
> {noformat}



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