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https://issues.apache.org/jira/browse/ARROW-340?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15793453#comment-15793453
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Wes McKinney commented on ARROW-340:
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This has been fixed, but needs a unit test.
> [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
>
> This can result in corrupted files. On creating a "new" file, it needs to be
> truncated to zero bytes.
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