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From "Prashant Kommireddi (Assigned) (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (PIG-2581) HashFNV inconsistent/non-deterministic due to default platform encoding
Date Wed, 14 Mar 2012 23:44:40 GMT

     [ https://issues.apache.org/jira/browse/PIG-2581?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Prashant Kommireddi reassigned PIG-2581:
----------------------------------------

    Assignee: Prashant Kommireddi
    
> 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
>            Assignee: Prashant Kommireddi
>            Priority: Minor
>         Attachments: PIG-2581.patch
>
>
> 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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