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https://issues.apache.org/jira/browse/YARN-9035?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16692396#comment-16692396
 ] 

Hadoop QA commented on YARN-9035:
---------------------------------

| (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 
12s{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 2 new or modified test 
files. {color} |
|| || || || {color:brown} trunk Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 22m 
12s{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 
40s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 
53s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
13m 31s{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}  1m 
17s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
30s{color} | {color:green} trunk passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  0m 
49s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
45s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 
45s{color} | {color:green} the patch passed {color} |
| {color:orange}-0{color} | {color:orange} checkstyle {color} | {color:orange}  
0m 35s{color} | {color:orange} 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager:
 The patch generated 21 new + 53 unchanged - 0 fixed = 74 total (was 53) 
{color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 
46s{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} 
13m 21s{color} | {color:green} patch has no errors when building and testing 
our client artifacts. {color} |
| {color:red}-1{color} | {color:red} findbugs {color} | {color:red}  1m 
37s{color} | {color:red} 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager
 generated 1 new + 0 unchanged - 0 fixed = 1 total (was 0) {color} |
| {color:red}-1{color} | {color:red} javadoc {color} | {color:red}  0m 
29s{color} | {color:red} 
hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager
 generated 1 new + 4 unchanged - 0 fixed = 5 total (was 4) {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:red}-1{color} | {color:red} unit {color} | {color:red}108m 35s{color} 
| {color:red} hadoop-yarn-server-resourcemanager in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
30s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black}167m 12s{color} | 
{color:black} {color} |
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|| Reason || Tests ||
| FindBugs | 
module:hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager
 |
|  |  Non-Boolean argument formatted using %b format specifier in 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.assignment.ValidReservationCheckResult.createFrom(HasContainerForNodeCheckResult,
 AMShareLimitCheckResult)  At ValidReservationCheckResult.java:format specifier 
in 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.assignment.ValidReservationCheckResult.createFrom(HasContainerForNodeCheckResult,
 AMShareLimitCheckResult)  At ValidReservationCheckResult.java:[line 34] |
| Failed junit tests | 
hadoop.yarn.server.resourcemanager.scheduler.fair.TestFSSchedulerNode |
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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-9035 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12948686/YARN-9035.001.patch |
| Optional Tests |  dupname  asflicense  compile  javac  javadoc  mvninstall  
mvnsite  unit  shadedclient  findbugs  checkstyle  |
| uname | Linux 44d837623fb0 3.13.0-143-generic #192-Ubuntu SMP Tue Feb 27 
10:45:36 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/provided.sh |
| git revision | trunk / b5d7b29 |
| maven | version: Apache Maven 3.3.9 |
| Default Java | 1.8.0_181 |
| findbugs | v3.1.0-RC1 |
| checkstyle | 
https://builds.apache.org/job/PreCommit-YARN-Build/22618/artifact/out/diff-checkstyle-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager.txt
 |
| findbugs | 
https://builds.apache.org/job/PreCommit-YARN-Build/22618/artifact/out/new-findbugs-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager.html
 |
| javadoc | 
https://builds.apache.org/job/PreCommit-YARN-Build/22618/artifact/out/diff-javadoc-javadoc-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager.txt
 |
| unit | 
https://builds.apache.org/job/PreCommit-YARN-Build/22618/artifact/out/patch-unit-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-YARN-Build/22618/testReport/ |
| Max. process+thread count | 956 (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/22618/console |
| Powered by | Apache Yetus 0.8.0   http://yetus.apache.org |


This message was automatically generated.



> Allow better troubleshooting of FS container assignments and lack of 
> container assignments
> ------------------------------------------------------------------------------------------
>
>                 Key: YARN-9035
>                 URL: https://issues.apache.org/jira/browse/YARN-9035
>             Project: Hadoop YARN
>          Issue Type: Improvement
>            Reporter: Szilard Nemeth
>            Assignee: Szilard Nemeth
>            Priority: Major
>         Attachments: YARN-9035.001.patch
>
>
> The call chain started from {{FairScheduler.attemptScheduling}}, to 
> {{FSQueue}} (parent / leaf).assignContainer and down to 
> {{FSAppAttempt#assignContainer}} has many calls and has many potential 
> conditions where {{Resources.none()}} can be returned, meaning container is 
> not allocated.
>  A bunch of these empty-assignments do not come with a debug log statement, 
> so it's very hard to tell what condition lead the {{FairScheduler}} to a 
> decision where containers are not allocated.
>  On top of that, in many places, it's difficult to tell either why a 
> container was allocated to an app attempt.
> The goal is to have a common place (i.e. class) that will do all the 
> loggings, so users conveniently can control all the logs if they are curious 
> why (and why not) container assigments happened.
>  Also, it would be handy if readers of the log could easily decide which 
> {{AppAttempt}} is the log record created for, in other words: every log 
> record should include the ID of the application / app attempt, if possible.
>  
> Details of implementation: 
>  As most of the already in-place debug messages were protected by a condition 
> that checks whether the debug level is enabled on loggers, I followed a 
> similar pattern. All the relevant log messages are created with the class 
> {{ResourceAssignment}}. 
>  This class is a wrapper for the assigned {{Resource}} object and has a 
> single logger, so clients should use its helper methods to create log 
> records. There is a helper method called {{shouldLogReservationActivity}} 
> that checks if DEBUG or TRACE level is activated on the logger. 
>  See the javadoc on this class for further information.
>  
> {{ResourceAssignment}} is also responsible for adding the app / appettempt ID 
> to every log record (with some exceptions).
>  A couple of check classes are introduced: They are responsible to run and 
> store results of checks that are dependency of a successful container 
> allocation.



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