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https://issues.apache.org/jira/browse/MAPREDUCE-7266?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17067803#comment-17067803
 ] 

Hadoop QA commented on MAPREDUCE-7266:
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| (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 
24s{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:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
34s{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 18m 
25s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m 
44s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
39s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m  
3s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
14m 57s{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 
12s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
44s{color} | {color:green} trunk passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
12s{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  0m 
56s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m 
43s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  1m 
43s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
33s{color} | {color:green} hadoop-mapreduce-project/hadoop-mapreduce-client: 
The patch generated 0 new + 21 unchanged - 1 fixed = 21 total (was 22) {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 
51s{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 49s{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 
23s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
39s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  4m  
3s{color} | {color:green} hadoop-mapreduce-client-hs in the patch passed. 
{color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red}139m 32s{color} 
| {color:red} hadoop-mapreduce-client-jobclient in the patch passed. {color} |
| {color:red}-1{color} | {color:red} asflicense {color} | {color:red}  0m 
38s{color} | {color:red} The patch generated 1 ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black}202m 58s{color} | 
{color:black} {color} |
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|| Reason || Tests ||
| Failed junit tests | hadoop.mapred.TestNetworkedJob |
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|| Subsystem || Report/Notes ||
| Docker | Client=19.03.8 Server=19.03.8 Image:yetus/hadoop:4454c6d14b7 |
| JIRA Issue | MAPREDUCE-7266 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12997349/YARN-10075.001.patch |
| Optional Tests |  dupname  asflicense  compile  javac  javadoc  mvninstall  
mvnsite  unit  shadedclient  findbugs  checkstyle  |
| uname | Linux 2bd0cc9ef9d5 4.15.0-58-generic #64-Ubuntu SMP Tue Aug 6 
11:12:41 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/provided.sh |
| git revision | trunk / 3d5ade1 |
| maven | version: Apache Maven 3.3.9 |
| Default Java | 1.8.0_242 |
| findbugs | v3.1.0-RC1 |
| unit | 
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/7734/artifact/out/patch-unit-hadoop-mapreduce-project_hadoop-mapreduce-client_hadoop-mapreduce-client-jobclient.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/7734/testReport/ |
| asflicense | 
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/7734/artifact/out/patch-asflicense-problems.txt
 |
| Max. process+thread count | 1363 (vs. ulimit of 5500) |
| modules | C: 
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs 
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient
 U: hadoop-mapreduce-project/hadoop-mapreduce-client |
| Console output | 
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/7734/console |
| Powered by | Apache Yetus 0.8.0   http://yetus.apache.org |


This message was automatically generated.



> historyContext doesn't need to be a class attribute inside JobHistoryServer
> ---------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-7266
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-7266
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: jobhistoryserver
>            Reporter: Siddharth Ahuja
>            Assignee: Siddharth Ahuja
>            Priority: Minor
>         Attachments: YARN-10075.001.patch
>
>
> "historyContext" class attribute at 
> https://github.com/apache/hadoop/blob/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/main/java/org/apache/hadoop/mapreduce/v2/hs/JobHistoryServer.java#L67
>  is assigned a cast of another class attribute - "jobHistoryService" - 
> https://github.com/apache/hadoop/blob/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/main/java/org/apache/hadoop/mapreduce/v2/hs/JobHistoryServer.java#L131,
>  however it does not need to be stored separately because it is only ever 
> used once in the clas, and that too as an argument while instantiating the 
> HistoryClientService class at 
> https://github.com/apache/hadoop/blob/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/main/java/org/apache/hadoop/mapreduce/v2/hs/JobHistoryServer.java#L155.
> Therefore, we could just delete the lines at 
> https://github.com/apache/hadoop/blob/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/main/java/org/apache/hadoop/mapreduce/v2/hs/JobHistoryServer.java#L67
>  and 
> https://github.com/apache/hadoop/blob/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/main/java/org/apache/hadoop/mapreduce/v2/hs/JobHistoryServer.java#L131
>  completely and instantiate the HistoryClientService as follows:
> {code}
>   @VisibleForTesting
>   protected HistoryClientService createHistoryClientService() {
>     return new HistoryClientService((HistoryContext)jobHistoryService, 
>         this.jhsDTSecretManager);
>   }
> {code}



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