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https://issues.apache.org/jira/browse/HIVE-21426?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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David Mollitor updated HIVE-21426:
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Status: Open (was: Patch Available)
> Remove Utilities Global Random
> ------------------------------
>
> Key: HIVE-21426
> URL: https://issues.apache.org/jira/browse/HIVE-21426
> Project: Hive
> Issue Type: Improvement
> Components: HiveServer2
> Affects Versions: 4.0.0, 3.2.0
> Reporter: David Mollitor
> Assignee: David Mollitor
> Priority: Minor
> Labels: pull-request-available
> Attachments: HIVE-21426.1.patch, HIVE-21426.1.patch
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/exec/Utilities.java#L253
> Remove global {{Random}} object in favor of {{ThreadLocalRandom}}.
> {quote}
> ThreadLocalRandom is initialized with an internally generated seed that may
> not otherwise be modified. When applicable, use of ThreadLocalRandom rather
> than shared Random objects in concurrent programs will typically encounter
> much less overhead and contention.
> {quote}
> https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ThreadLocalRandom.html
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