Output filter is not finished

[Adelino Monteiro]

Hello,

I've build an output filter based on the guide from Evan Miller and some
other modules.

Everything has been working fine but lately I found that my next_body_filter
call is returning NGX_AGAIN.
This happens when I only have a very small  chain that won't get processed
(I put in the ctx to process the next time), so the call to
 ngx_http_next_body_filter(r, in)  basically don't has any output to
process.
Strangely I see that nginx put my request into a timer but what happens is
that after that time the request is broken and the rest of the file don't
get processed.

Have a look at the output please:

2011/08/08 15:45:41 [debug] 11461#0: *1 http postpone filter "/u2.mp4?"
0000000001A02790
2011/08/08 15:45:41 [debug] 11461#0: *1 write new buf t:0 f:0
0000000000000000, pos 0000000001A0A56C, size: 5 file: 0, size: 0
2011/08/08 15:45:41 [debug] 11461#0: *1 write new buf t:1 f:0
0000000001A6ACB0, pos 0000000001A6ACB0, size: -5 file: 0, size: 0
2011/08/08 15:45:41 [debug] 11461#0: *1 http write filter: l:0 f:1 s:0
2011/08/08 15:45:41 [debug] 11461#0: *1 Save left_bytes [13] in context
2011/08/08 15:45:41 [debug] 11461#0: *1 http copy filter: -2 "/u2.mp4?"
2011/08/08 15:45:41 [debug] 11461#0: *1 http finalize request: -2,
"/u2.mp4?" a:1, c:1
2011/08/08 15:45:41 [debug] 11461#0: *1 event timer add: 3:
60000:1312814801328
2011/08/08 15:46:41 [debug] 11461#0: *1 event timer del: 3: 1312814801328
2011/08/08 15:46:41 [debug] 11461#0: *1 http run request: "/u2.mp4?"
2011/08/08 15:46:41 [debug] 11461#0: *1 http writer handler: "/u2.mp4?"
2011/08/08 15:46:41 [info] 11461#0: *1 client timed out (110: Connection
timed out) while sending mp4 to client, client: 192.168.56.1, server:
localhost, request: "GET /u2.mp4 HTTP/1.1", host: "192.168.56.101:8080"
2011/08/08 15:46:41 [debug] 11461#0: *1 http finalize request: 408,
"/u2.mp4?" a:1, c:1
2011/08/08 15:46:41 [debug] 11461#0: *1 http terminate request count:1
2011/08/08 15:46:41 [debug] 11461#0: *1 http terminate cleanup count:1 blk:0
2011/08/08 15:46:41 [debug] 11461#0: *1 http posted request: "/u2.mp4?"
2011/08/08 15:46:41 [debug] 11461#0: *1 http terminate handler count:1
2011/08/08 15:46:41 [debug] 11461#0: *1 http request count:1 blk:0
2011/08/08 15:46:41 [debug] 11461#0: *1 http close request
2011/08/08 15:46:41 [debug] 11461#0: *1 http log handler
2011/08/08 15:46:41 [debug] 11461#0: *1 run cleanup: 0000000001A0A290
2011/08/08 15:46:41 [debug] 11461#0: *1 file cleanup: fd:12
2011/08/08 15:46:41 [debug] 11461#0: *1 free: 0000000000000000
2011/08/08 15:46:41 [debug] 11461#0: *1 free: 0000000001A6ACB0
2011/08/08 15:46:41 [debug] 11461#0: *1 free: 0000000001A546C0
2011/08/08 15:46:41 [debug] 11461#0: *1 free: 0000000001A098C0, unused: 8
2011/08/08 15:46:41 [debug] 11461#0: *1 free: 0000000001A02680, unused: 3527
2011/08/08 15:46:41 [debug] 11461#0: *1 close http connection: 3
2011/08/08 15:46:41 [debug] 11461#0: *1 reusable connection: 0
2011/08/08 15:46:41 [debug] 11461#0: *1 free: 0000000001A094B0
2011/08/08 15:46:41 [debug] 11461#0: *1 free: 0000000001A08EB0
2011/08/08 15:46:41 [debug] 11461#0: *1 free: 00000000019FDBE0, unused: 8
2011/08/08 15:46:41 [debug] 11461#0: *1 free: 0000000001A093A0, unused: 128

My question is what magic do I need to do in order to tell Nginx that I
don't have data to processe this time and to send me other content.

I googled around and found some information from 2007 that told me to use
timer but I can't find a example with that implementation and don't know if
that is any longer supported.

Any help is appreciated.

AM
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