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https://issues.apache.org/jira/browse/ARROW-340?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wes McKinney resolved ARROW-340.
--------------------------------
    Resolution: Fixed
      Assignee: Wes McKinney

Resolved in 
https://github.com/apache/arrow/commit/d9df556791fc6051b2c8582668df9c256f675116

> [C++] Opening a writeable file on disk that already exists does not truncate 
> to zero
> ------------------------------------------------------------------------------------
>
>                 Key: ARROW-340
>                 URL: https://issues.apache.org/jira/browse/ARROW-340
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: C++
>            Reporter: Wes McKinney
>            Assignee: Wes McKinney
>
> This can result in corrupted files. On creating a "new" file, it needs to be 
> truncated to zero bytes. 



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