Webdav & chunk encoding : error code 500

[smainklh at free.fr]

Hello,

We're trying to use an appliance with the Nginx Webdav server.
It is a streaming encoding plateform which is trying to send chunks. 

But for each chunks, we got a 500 error.

We noticed the following error logs :
2013/10/25 16:24:17 [error] 35861#0: *50524 no user/password was provided for basic authentication, client: 109.231.227.156, server: localhost, request: "PROPFIND /864/ HTTP/1.1", host: "95.81.159.200"
2013/10/25 16:24:17 [alert] 32000#0: worker process 35861 exited on signal 11
2013/10/25 16:24:19 [crit] 35865#0: *50527 chmod() "/data/ram/864/.tmp/0000036090" failed (2: No such file or directory), client: x.x.x.x, server: localhost, request: "PUT /864/test_300_00001.ts HTTP/1.1", host: "x.x.x.x"
2013/10/25 16:24:19 [crit] 35865#0: *50527 unlink() "/data/ram/864/.tmp/0000036090" failed (2: No such file or directory), client: x.x.x.x, server: localhost, request: "PUT /864/test_300_00001.ts HTTP/1.1", host: "x.x.x.x"
2013/10/25 16:24:19 [crit] 35865#0: *50528 chmod() "/data/ram/864/.tmp/0000036091" failed (2: No such file or directory), client: x.x.x.x, server: localhost, request: "PUT /864/test_600_00001.ts HTTP/1.1", host: "x.x.x.x"
2013/10/25 16:24:19 [crit] 35865#0: *50528 unlink() "/data/ram/864/.tmp/0000036091" failed (2: No such file or directory), client: x.x.x.x, server: localhost, request: "PUT /864/test_600_00001.ts HTTP/1.1", host: "x.x.x.x"
2013/10/25 16:24:19 [crit] 35865#0: *50529 chmod() "/data/ram/864/.tmp/0000036092" failed (2: No such file or directory), client: x.x.x.x, server: localhost, request: "PUT /864/test_1000_00001.ts HTTP/1.1", host: "x.x.x.x"
2013/10/25 16:24:19 [crit] 35865#0: *50529 unlink() "/data/ram/864/.tmp/0000036092" failed (2: No such file or directory), client: x.x.x.x, server: localhost, request: "PUT /864/test_1000_00001.ts HTTP/1.1", host: "x.x.x.x"
2013/10/25 16:24:19 [alert] 32000#0: worker process 35865 exited on signal 11

Please find enclose my nginx configuration.
Could you please help me ?

Regards,
Smana
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