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Posted to dev@hive.apache.org by "David Mollitor (Jira)" <ji...@apache.org> on 2019/10/31 17:01:00 UTC

[jira] [Created] (HIVE-22441) Metrics Subsytem Improvements

David Mollitor created HIVE-22441:
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             Summary: Metrics Subsytem Improvements
                 Key: HIVE-22441
                 URL: https://issues.apache.org/jira/browse/HIVE-22441
             Project: Hive
          Issue Type: Improvement
    Affects Versions: 3.2.0
            Reporter: David Mollitor
            Assignee: David Mollitor


# CodahaleMetrics uses Guava LoadingCache, which is already thread-safe, and then puts an explicit lock around the structure.  Use Java 8 new Map API with ConcurrentHashMap.
# Introduce Java 8 APIs
# Simplifications
# Updated unit tests to no longer include a 'sleep'

https://github.com/apache/hive/blob/master/common/src/java/org/apache/hadoop/hive/common/metrics/metrics2/CodahaleMetrics.java#L91-L94




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