[ https://issues.apache.org/jira/browse/HIVE-16282?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Deepak Jaiswal updated HIVE-16282: ---------------------------------- Attachment: HIVE-16282.4.patch Dont import java.util.* > Semijoin: Disable slow-start for the bloom filter aggregate task > ---------------------------------------------------------------- > > Key: HIVE-16282 > URL: https://issues.apache.org/jira/browse/HIVE-16282 > Project: Hive > Issue Type: Bug > Affects Versions: 2.2.0 > Reporter: Gopal V > Assignee: Deepak Jaiswal > Attachments: extended plan.rtf, HIVE-16282.1.patch, > HIVE-16282.2.patch, HIVE-16282.3.patch, HIVE-16282.4.patch > > > The slow-start of the bloom filter vertex is a scheduling problem which > causes more pre-emption than is useful. > When the bloom filters are arranged as follows > Map 1(10 tasks)->Reducer 2(1 task)->Map 3(100 tasks) > Map 3 and Map 1 are immediately active since Reducer 2 -> Map 3 is a > broadcast edge. > Once 3 tasks in Map 1 finish, the engine kills one active task from Map 3 to > make room for Reducer 2. -- This message was sent by Atlassian JIRA (v6.3.15#6346)