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Posted to common-issues@hadoop.apache.org by "Andrzej Bialecki (JIRA)" <ji...@apache.org> on 2009/11/13 17:11:39 UTC

[jira] Commented: (HADOOP-6372) MurmurHash does not yield the same results as the reference C++ implementation when size % 4 >= 2

    [ https://issues.apache.org/jira/browse/HADOOP-6372?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12777539#action_12777539 ] 

Andrzej Bialecki  commented on HADOOP-6372:
-------------------------------------------

I confirm the bug, and the bugfix works as expected.

> MurmurHash does not yield the same results as the reference C++ implementation when size % 4 >= 2
> -------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-6372
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6372
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: util
>    Affects Versions: 0.20.1
>            Reporter: olivier gillet
>            Priority: Trivial
>         Attachments: HADOOP-6372.patch
>
>   Original Estimate: 1h
>  Remaining Estimate: 1h
>
> Last rounds of MurmurHash are done in reverse order. data[length - 3], data[length - 2] and data[length - 1] in the block processing the remaining bytes should be data[len_m +2], data[len_m + 1], data[len_m].

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