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https://issues.apache.org/jira/browse/HIVE-23294?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17092543#comment-17092543
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Ashutosh Chauhan commented on HIVE-23294:
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[~rajesh.balamohan] what do you think of my patch. Arguably it might be faster
since we never hit synchronized method nor we need to worry about memory.
Though reflection access might be as fast as hashmap lookup.
> Remove sync bottleneck in TezConfigurationFactory
> -------------------------------------------------
>
> Key: HIVE-23294
> URL: https://issues.apache.org/jira/browse/HIVE-23294
> Project: Hive
> Issue Type: Improvement
> Reporter: Rajesh Balamohan
> Assignee: Rajesh Balamohan
> Priority: Major
> Attachments: HIVE-23294.1.patch, HIVE-23294.2.patch, Screenshot
> 2020-04-24 at 1.53.20 PM.png
>
>
> [https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/exec/tez/TezConfigurationFactory.java#L53]
> [https://github.com/apache/hadoop/blob/master/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/conf/Configuration.java#L1628]
> It ends up locking for property names in the config. For short running
> queries with concurrency, this is an issue.
>
> !Screenshot 2020-04-24 at 1.53.20 PM.png|width=1086,height=459!
>
>
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