Gopal V created HIVE-16282: ------------------------------ Summary: 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
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)