Ashutosh Chauhan created HIVE-12164:
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Summary: Remove jdbc stats collection mechanism
Key: HIVE-12164
URL: https://issues.apache.org/jira/browse/HIVE-12164
Project: Hive
Issue Type: Task
Components: Statistics
Reporter: Ashutosh Chauhan
Assignee: Ashutosh Chauhan
Though there are some deployments using it, usually its painful to setup since
a valid hive-site.xml is needed on all task nodes (containing connection
details) and for large tasks (with thousands of tasks) results in a scalability
issue with all of them hammering DB at nearly same time.
Because of these pain points alternative stats collection mechanism were added.
FS stats based system is default for some time.
We should remove jdbc stats collection mechanism as it needlessly adds
complexity in TS and FS operators w.r.t key handling.
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