[FFmpeg-user] [hls @ 0x1db8850]failed to rename file .tmp to

[MMY]

Hello

I have problem with ffserver and HLS .
When user request the test.m3u8, ffserver write this error :
[hls @ 0x1db8850]failed to rename file .tmp to

FFServer :
ffserver -f ffserver.conf

ffserver.conf :
HTTPPort 8090
<Feed feed1.ffm>
File /tmp/feed1.ffm
FileMaxSize 200K
</Feed>
# HLS compatible
<Stream test.m3u8>
Feed feed1.ffm
Format hls
VideoFrameRate 15
VideoSize 352x240
VideoBitRate 256
VideoBufferSize 40
VideoGopSize 30
AudioBitRate 64
StartSendOnKey
</Stream>

ffmpeg -i 2.mp4 http://127.0.0.1:8090/feed1.ffm

vlc http://localhost:8090/test.m3u8

Got this error :
[hls @ 0x1db8850]failed to rename file tmp to

FFMpeg Version :
ffmpeg version 2.8.5 Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04)

http://pastebin.com/kzxJdUVu

Thank you in advance