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https://issues.apache.org/jira/browse/AVRO-1141?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Thiruvalluvan M. G. updated AVRO-1141:
--------------------------------------

    Attachment: AVRO-1141.patch

+1

Tested on Cygwin. Added a unit-test to catch the problem.
                
> Avro data files are created without O_TRUNC
> -------------------------------------------
>
>                 Key: AVRO-1141
>                 URL: https://issues.apache.org/jira/browse/AVRO-1141
>             Project: Avro
>          Issue Type: Bug
>          Components: c++
>    Affects Versions: 1.7.1
>            Reporter: Martin Nagy
>         Attachments: AVRO-1141.patch, cpp_filestream_o_trunc.patch
>
>
> Avro data files are created without O_TRUNC. If the file existed before and 
> the new file is smaller than the old one, the resulting data file will be 
> corrupted (containing remnants of the old file).

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