As your snippet is very short I cannot be sure but some questions to guide
on debugging
- did you closed the file when finished to write? some bytes may be in
buffer and will be flushed after the close.
- the m->chain was used before to write its content to other place? If yes,
may be necessary to reset some internal pointers.
- what do you mean by "not csv file"? What is the content of 0000000001
file?

Regards

On Wed, Sep 24, 2014 at 6:03 AM, hungnguyen <nginx-forum@nginx.us> wrote:

> anyone? Please!
>
> Posted at Nginx Forum:
> http://forum.nginx.org/read.php?2,253477,253506#msg-253506
>
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