Gopal V created HIVE-7121:
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Summary: Use murmur hash to distribute HiveKey
Key: HIVE-7121
URL: https://issues.apache.org/jira/browse/HIVE-7121
Project: Hive
Issue Type: Bug
Components: Query Processor
Reporter: Gopal V
Assignee: Gopal V
The current hashCode implementation produces poor parallelism when dealing with
single integers or doubles.
And for partitioned inserts into a 1 bucket table, there is a significant
hotspot on Reducer #31.
Removing the magic number 31 and using a more normal hash algorithm would help
fix these hotspots.
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