Daniel Dai created HIVE-20549:
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Summary: Allow user set query tag, and kill query with tag
Key: HIVE-20549
URL: https://issues.apache.org/jira/browse/HIVE-20549
Project: Hive
Issue Type: Bug
Reporter: Daniel Dai
Assignee: Daniel Dai
HIVE-19924 add capacity for replication job set a query tag and kill the
replication distcp job with the tag. Here I make it more general, user can set
arbitrary "hive.query.tag" in sql script, and kill query with the tag. Hive
will cancel the corresponding operation in hs2, along with Tez/MR application
launched for the query. For example:
{code}
set hive.query.tag=mytag;
select ..... -- long running query
{code}
In another session:
{code}
kill query 'mytag';
{code}
There're limitations in the implementation:
1. No tag duplication check. There's nothing to prevent conflicting tag for
same user, and kill query will kill queries share the same tag. However, kill
query will not kill queries from different user unless admin. So different user
might share the same tag
2. In multiple hs2 environment, kill statement should be issued to all hs2 to
make sure the corresponding operation is canceled. When beeline/jdbc connects
to hs2 using regular way (zookeeper url), the session will connect to random
hs2, which might be different than the hs2 where query run on. User can use
HiveConnection.getAllUrls or beeline --getUrlsFromBeelineSite (HIVE-20507) to
get a list of all hs2 instances.
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