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Gopal V commented on HIVE-6924: ------------------------------- I tracked down the version of MurmurHash checked into hadoop itself http://hadoop.apache.org/docs/r1.1.2/api/org/apache/hadoop/util/hash/MurmurHash.html With this inlined into the MapJoinKeyBytes, I get before: http://people.apache.org/~gopalv/mapjoin-flame.svg after: http://people.apache.org/~gopalv/mapjoin-murumur-flame.svg > MapJoinKeyBytes::hashCode() should use Murmur hash > -------------------------------------------------- > > Key: HIVE-6924 > URL: https://issues.apache.org/jira/browse/HIVE-6924 > Project: Hive > Issue Type: Improvement > Reporter: Sergey Shelukhin > Assignee: Sergey Shelukhin > Attachments: HIVE-6924.patch > > > Existing hashCode is bad, causes HashMap to cluster -- This message was sent by Atlassian JIRA (v6.2#6252)