[HIVE-20687] Cancel Running Druid Query when a hive query is cancelled.

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: Druid integration
• Assignee: Nishant Bangarwa
• Reporter: Nishant Bangarwa
• Created: 03/Oct/18 19:23
• Updated: 05/Oct/18 00:19

Description

https://issues.apache.org/jira/browse/HIVE-20686 ensures that hive query id is passed to druid.
Druid also supports query cancellation by query id.
Queries can be cancelled explicitly using their queryId by sending a DELETE request to following endpoint on the broker or router -

 
DELETE /druid/v2/{queryId}

Implementation wise we need to cancel a druid query when a RecordReader is closed.
I believe Hive should already be calling close on open recordReaders when someone cancels a query.