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From "Daniel Andersson (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (PIG-2581) HashFNV inconsistent/non-deterministic due to default platform encoding
Date Tue, 13 Mar 2012 14:29:38 GMT
HashFNV inconsistent/non-deterministic due to default platform encoding

                 Key: PIG-2581
                 URL: https://issues.apache.org/jira/browse/PIG-2581
             Project: Pig
          Issue Type: Bug
          Components: piggybank
    Affects Versions: 0.8.1
            Reporter: Daniel Andersson
            Priority: Minor

HashFNV (org/apache/pig/piggybank/evaluation/string/HashFNV) bases its computation on String.getBytes(),
which uses the platform default encoding. This leads to different results on different platforms.
Worse, if any character is not supported by the encoding, the behavior is completely undefined.
We have observed non-deterministic behavior that seems to be caused by this.

Suggested fix is to instead use String.getBytes("UTF-8"), which will be well-defined and consistent
on every platform.

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