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https://issues.apache.org/jira/browse/YARN-10849?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17389897#comment-17389897
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Hadoop QA commented on YARN-10849:
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|| Vote || Subsystem || Runtime ||  Logfile || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  0m 
55s{color} | {color:blue}{color} | {color:blue} Docker mode activated. {color} |
|| || || || {color:brown} Prechecks {color} || ||
| {color:green}+1{color} | {color:green} dupname {color} | {color:green}  0m  
1s{color} | {color:green}{color} | {color:green} No case conflicting files 
found. {color} |
| {color:green}+1{color} | {color:green} @author {color} | {color:green}  0m  
0s{color} | {color:green}{color} | {color:green} The patch does not contain any 
@author tags. {color} |
| {color:green}+1{color} | {color:green} {color} | {color:green}  0m  0s{color} 
| {color:green}test4tests{color} | {color:green} The patch appears to include 1 
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|| || || || {color:brown} trunk Compile Tests {color} || ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 20m 
27s{color} | {color:green}{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
37s{color} | {color:green}{color} | {color:green} trunk passed with JDK 
Ubuntu-11.0.11+9-Ubuntu-0ubuntu2.20.04 {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
33s{color} | {color:green}{color} | {color:green} trunk passed with JDK Private 
Build-1.8.0_292-8u292-b10-0ubuntu1~20.04-b10 {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
27s{color} | {color:green}{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 
37s{color} | {color:green}{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
14m 34s{color} | {color:green}{color} | {color:green} branch has no errors when 
building and testing our client artifacts. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
23s{color} | {color:green}{color} | {color:green} trunk passed with JDK 
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| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
22s{color} | {color:green}{color} | {color:green} trunk passed with JDK Private 
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| {color:blue}0{color} | {color:blue} spotbugs {color} | {color:blue} 16m 
20s{color} | {color:blue}{color} | {color:blue} Both FindBugs and SpotBugs are 
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| {color:green}+1{color} | {color:green} spotbugs {color} | {color:green}  1m  
1s{color} | {color:green}{color} | {color:green} trunk passed {color} |
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| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  0m 
30s{color} | {color:green}{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
30s{color} | {color:green}{color} | {color:green} the patch passed with JDK 
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| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 
30s{color} | {color:green}{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
27s{color} | {color:green}{color} | {color:green} the patch passed with JDK 
Private Build-1.8.0_292-8u292-b10-0ubuntu1~20.04-b10 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 
27s{color} | {color:green}{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
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| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 
29s{color} | {color:green}{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green}  0m 
 0s{color} | {color:green}{color} | {color:green} The patch has no whitespace 
issues. {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
13m 11s{color} | {color:green}{color} | {color:green} patch has no errors when 
building and testing our client artifacts. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
19s{color} | {color:green}{color} | {color:green} the patch passed with JDK 
Ubuntu-11.0.11+9-Ubuntu-0ubuntu2.20.04 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
20s{color} | {color:green}{color} | {color:green} the patch passed with JDK 
Private Build-1.8.0_292-8u292-b10-0ubuntu1~20.04-b10 {color} |
| {color:green}+1{color} | {color:green} spotbugs {color} | {color:green}  1m  
7s{color} | {color:green}{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} || ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 20m 
37s{color} | {color:green}{color} | {color:green} hadoop-yarn-services-core in 
the patch passed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
31s{color} | {color:green}{color} | {color:green} The patch does not generate 
ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 79m 19s{color} | 
{color:black}{color} | {color:black}{color} |
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|| Subsystem || Report/Notes ||
| Docker | ClientAPI=1.41 ServerAPI=1.41 base: 
https://ci-hadoop.apache.org/job/PreCommit-YARN-Build/1163/artifact/out/Dockerfile
 |
| JIRA Issue | YARN-10849 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/13031202/YARN-10849.003.patch |
| Optional Tests | dupname asflicense compile javac javadoc mvninstall mvnsite 
unit shadedclient findbugs checkstyle spotbugs |
| uname | Linux 61a4abc4c675 4.15.0-112-generic #113-Ubuntu SMP Thu Jul 9 
23:41:39 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | personality/hadoop.sh |
| git revision | trunk / 54f9fff218e |
| Default Java | Private Build-1.8.0_292-8u292-b10-0ubuntu1~20.04-b10 |
| Multi-JDK versions | 
/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.11+9-Ubuntu-0ubuntu2.20.04 
/usr/lib/jvm/java-8-openjdk-amd64:Private 
Build-1.8.0_292-8u292-b10-0ubuntu1~20.04-b10 |
|  Test Results | 
https://ci-hadoop.apache.org/job/PreCommit-YARN-Build/1163/testReport/ |
| Max. process+thread count | 847 (vs. ulimit of 5500) |
| modules | C: 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-services/hadoop-yarn-services-core
 U: 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-services/hadoop-yarn-services-core
 |
| Console output | 
https://ci-hadoop.apache.org/job/PreCommit-YARN-Build/1163/console |
| versions | git=2.25.1 maven=3.6.3 spotbugs=4.2.2 |
| Powered by | Apache Yetus 0.13.0-SNAPSHOT https://yetus.apache.org |


This message was automatically generated.



> Clarify testcase documentation for 
> TestServiceAM#testContainersReleasedWhenPreLaunchFails
> -----------------------------------------------------------------------------------------
>
>                 Key: YARN-10849
>                 URL: https://issues.apache.org/jira/browse/YARN-10849
>             Project: Hadoop YARN
>          Issue Type: Improvement
>            Reporter: Szilard Nemeth
>            Assignee: Szilard Nemeth
>            Priority: Minor
>         Attachments: YARN-10849.001.patch, YARN-10849.002.patch, 
> YARN-10849.003.patch
>
>
> There's a small comment added to testcase: 
> org.apache.hadoop.yarn.service.TestServiceAM#testContainersReleasedWhenPreLaunchFails:
> {code}
>   // Test to verify that the containers are released and the
>   // component instance is added to the pending queue when building the launch
>   // context fails.
> {code}
> However, it was not clear for me why the "launch context" would fail.
> While the test passes, it throws an Exception that tells the story. 
> {code}
> 2021-07-06 18:31:04,438 ERROR [pool-275-thread-1] 
> containerlaunch.ContainerLaunchService (ContainerLaunchService.java:run(122)) 
> - [COMPINSTANCE compa-0 : container_1625589063422_0001_01_000001]: Failed to 
> launch container.
> java.lang.IllegalArgumentException: Can not create a Path from a null string
>       at org.apache.hadoop.fs.Path.checkPathArg(Path.java:164)
>       at org.apache.hadoop.fs.Path.<init>(Path.java:180)
>       at 
> org.apache.hadoop.yarn.service.provider.tarball.TarballProviderService.processArtifact(TarballProviderService.java:39)
>       at 
> org.apache.hadoop.yarn.service.provider.AbstractProviderService.buildContainerLaunchContext(AbstractProviderService.java:144)
>       at 
> org.apache.hadoop.yarn.service.containerlaunch.ContainerLaunchService$ContainerLauncher.run(ContainerLaunchService.java:107)
>       at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
>       at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
>       at java.lang.Thread.run(Thread.java:748)
> {code}
> This exception is thrown because the id of the Artifact object is unset 
> (null) and TarballProviderService.processArtifact verifies it and it does not 
> allow such artifacts.
> The aim of this jira is to add a clarification comment or javadoc to this 
> method.



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