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From "Sunitha Beeram (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-16206) Make Codahale metrics reporters pluggable
Date Tue, 14 Mar 2017 17:42:41 GMT
Sunitha Beeram created HIVE-16206:
-------------------------------------

             Summary: Make Codahale metrics reporters pluggable
                 Key: HIVE-16206
                 URL: https://issues.apache.org/jira/browse/HIVE-16206
             Project: Hive
          Issue Type: Improvement
          Components: Metastore
            Reporter: Sunitha Beeram
            Assignee: Sunitha Beeram


Hive metrics code currently allows pluggable metrics handlers - ie, handlers that take care
of providing interfaces for metrics collection as well as a reporting; one of the 'handlers'
is CodahaleMetrics. Codahale can work with different reporters - currently supported ones
are Console, JMX, JSON file and hadoop2 sink. However, adding a new reporter involves changing
that class. We would like to make this conf driven just the way MetricsFactory handles configurable
Metrics classes.

Scope of work:
- Provide a new configuration option, HIVE_CODAHALE_REPORTER_CLASSES that enumerates classes
(like HIVE_METRICS_CLASS and unlike HIVE_METRICS_REPORTER).
- Move JsonFileReporter into its own class.
- Update CodahaleMetrics.java to read new config option and if the new option is not present,
look for the old option and instantiate accordingly) - ie, make the code backward compatible.
- Update and add new tests.



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