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https://issues.apache.org/jira/browse/YARN-10075?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Siddharth Ahuja updated YARN-10075:
-----------------------------------
Description:
"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}
was:
"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 line 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#L131
completely and instantiate the HistoryClientService as follows:
{code}
@VisibleForTesting
protected HistoryClientService createHistoryClientService() {
return new HistoryClientService((HistoryContext)jobHistoryService,
this.jhsDTSecretManager);
}
{code}
> historyContext doesn't need to be a class attribute inside JobHistoryServer
> ---------------------------------------------------------------------------
>
> Key: YARN-10075
> URL: https://issues.apache.org/jira/browse/YARN-10075
> Project: Hadoop YARN
> Issue Type: Improvement
> Reporter: Siddharth Ahuja
> Assignee: Siddharth Ahuja
> Priority: Minor
>
> "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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