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https://issues.apache.org/jira/browse/HIVE-6924?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13973253#comment-13973253
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Ashutosh Chauhan commented on HIVE-6924:
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Not sure, but I hear Cuckoo hashing is even better. We have internal 
implementation of it in ql/exec/vector/expressions/CuckooSetBytes.java Shall we 
use that?

> 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



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