Add reset operation to Metrics MBean.
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Key: HIVE-2490
URL: https://issues.apache.org/jira/browse/HIVE-2490
Project: Hive
Issue Type: New Feature
Reporter: Kevin Wilfong
Assignee: Kevin Wilfong
We should add a reset operation to the Metrics MBean, which will set all the
counters to 0.
Note: Deleting the counters from the map of attributes was not suggested
because that could break any scripts that get the list of attributes from the
bean and then the values of each attribute. Also, 0 is unlikely to be an
actual value for any counter, and it will not break the increment
functionality.
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