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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-9098) Separate mtab file reader code and cgroups file system hierarchy parser code from CGroupsHandlerImpl and ResourceHandlerModule
Date Thu, 14 Feb 2019 17:01:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-9098?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16768515#comment-16768515
] 

Hadoop QA commented on YARN-9098:
---------------------------------

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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  0m 16s{color} | {color:blue}
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|| || || || {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 4 new or modified test files. {color} |
|| || || || {color:brown} trunk Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 16m 21s{color}
| {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m  2s{color} |
{color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 27s{color}
| {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 41s{color} |
{color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 11m 50s{color}
| {color:green} branch has no errors when building and testing our client artifacts. {color}
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| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  0m 56s{color} |
{color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 27s{color} |
{color:green} trunk passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  0m 35s{color}
| {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 58s{color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 58s{color} | {color:green}
the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 23s{color}
| {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 36s{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} 12m  3s{color}
| {color:green} patch has no errors when building and testing our client artifacts. {color}
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| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  1m  3s{color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 20s{color} |
{color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 21m 20s{color} | {color:green}
hadoop-yarn-server-nodemanager in the patch passed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 24s{color}
| {color:green} The patch does not generate ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 69m 47s{color} | {color:black}
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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-9098 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12958739/YARN-9098.007.patch
|
| Optional Tests |  dupname  asflicense  compile  javac  javadoc  mvninstall  mvnsite  unit
 shadedclient  findbugs  checkstyle  |
| uname | Linux 30b0d747527d 4.4.0-139-generic #165-Ubuntu SMP Wed Oct 24 10:58:50 UTC 2018
x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/provided.sh |
| git revision | trunk / 7a57974 |
| maven | version: Apache Maven 3.3.9 |
| Default Java | 1.8.0_191 |
| findbugs | v3.1.0-RC1 |
|  Test Results | https://builds.apache.org/job/PreCommit-YARN-Build/23408/testReport/ |
| Max. process+thread count | 445 (vs. ulimit of 10000) |
| modules | C: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager
U: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager |
| Console output | https://builds.apache.org/job/PreCommit-YARN-Build/23408/console |
| Powered by | Apache Yetus 0.8.0   http://yetus.apache.org |


This message was automatically generated.



> Separate mtab file reader code and cgroups file system hierarchy parser code from CGroupsHandlerImpl
and ResourceHandlerModule
> ------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: YARN-9098
>                 URL: https://issues.apache.org/jira/browse/YARN-9098
>             Project: Hadoop YARN
>          Issue Type: Improvement
>            Reporter: Szilard Nemeth
>            Assignee: Szilard Nemeth
>            Priority: Major
>         Attachments: YARN-9098.002.patch, YARN-9098.003.patch, YARN-9098.004.patch, YARN-9098.005.patch,
YARN-9098.006.patch, YARN-9098.007.patch
>
>
> Separate mtab file reader code and cgroups file system hierarchy parser code from CGroupsHandlerImpl
and ResourceHandlerModule
> CGroupsHandlerImpl has a method parseMtab that parses an mtab file and stores cgroups
data.
> CGroupsLCEResourcesHandler also has a method with the same name, with identical code.
> The parser code should be extracted from these places and be added in a new class as
this is a separate responsibility.
> As the output of the file parser is a Map<String, Set<String>>, it's better
to encapsulate it in a domain object, named 'CGroupsMountConfig' for instance.
> ResourceHandlerModule has a method named parseConfiguredCGroupPath, that is responsible
for producing the same results (Map<String, Set<String>>) to store cgroups data,
it does not operate on mtab file, but looking at the filesystem for cgroup settings. As the
output is the same, CGroupsMountConfig should be used here, too.
> Again, this could should not be part of ResourceHandlerModule as it is a different responsibility.
> One more thing which is strongly related to the methods above is CGroupsHandlerImpl.initializeFromMountConfig:
This method processes the result of a parsed mtab file or a parsed cgroups filesystem data
and stores file system paths for all available controllers. This method invokes findControllerPathInMountConfig,
which is a duplicated in CGroupsHandlerImpl and CGroupsLCEResourcesHandler, so it should be
moved to a single place. To store filesystem path and controller mappings, a new domain object
could be introduced.



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