[
https://issues.apache.org/jira/browse/HIVE-3270?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Navis resolved HIVE-3270.
-------------------------
Resolution: Duplicate
This is duplicated by HIVE-3403.
> SMBJoin should be applied atomically
> -------------------------------------
>
> Key: HIVE-3270
> URL: https://issues.apache.org/jira/browse/HIVE-3270
> Project: Hive
> Issue Type: Improvement
> Components: Query Processor
> Reporter: Navis
> Priority: Minor
>
> For using smbjoin, mapjoin hint(/*+MAPJOIN(..)*/) + bucket mapjoin
> configuration(hive.optimize.bucketmapjoin) also should be preceded.
> But when BucketMapJoinOptimizer or SortedMergeBucketMapJoinOptimizer fails to
> convert mapjoin to smbjoin by some reason, it will be executed as a (bucket)
> mapjoin, which possibly cause OOM in map task.
> I think there should be a hint for SMBJoin, which tries to convert
> common-join to smbjoin and when it fails, simply fallbacks to common-join.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
