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r->headers_out.status = 0

September 21, 2011 08:20AM
Hello colleagues,
Last week I wrote a module that generates custom access log and in
general it works fine. I found several records with status core 0.
In my test bed I have clear nginx 1.0.4 installation with configured
proxy_cache. The instance is used as a reverse proxy.

I found a strange case when in the log phase my log module receives
r->headers_out.status == 0, r->connection->sent also is 0. What could
be the reason for these values?

In the log file I found :
2011/09/21 11:40:21 [debug] 9246#0: *18075 http proxy status 200 "200 OK"
2011/09/21 11:40:21 [debug] 9246#0: *18075 http proxy header: "Server:
nginx 1.0.4"
2011/09/21 11:40:21 [debug] 9246#0: *18075 http proxy header: "Date:
Wed, 21 Sep 2011 11:40:20 GMT"
2011/09/21 11:40:21 [debug] 9246#0: *18075 http proxy header:
"Content-Type: application/octet-stream"
2011/09/21 11:40:21 [debug] 9246#0: *18075 http proxy header:
"Connection: close"
2011/09/21 11:40:21 [debug] 9246#0: *18075 http proxy header:
"Content-Length: 4312"
2011/09/21 11:40:21 [debug] 9246#0: *18075 http proxy header:
"Last-Modified: Thu, 24 Mar 2011 14:32:53 GMT"
2011/09/21 11:40:21 [debug] 9246#0: *18075 http proxy header: "Expires:
Wed, 21 Sep 2011 11:45:18 GMT"
2011/09/21 11:40:21 [debug] 9246#0: *18075 http proxy header:
"Cache-Control: max-age=300"
2011/09/21 11:40:21 [debug] 9246#0: *18075 http proxy header:
"Accept-Ranges: bytes"

2011/09/21 11:40:21 [debug] 9246#0: *18075 http finalize request: -2,
"/s/169/file_906?" a:1, c:2
2011/09/21 11:40:21 [debug] 9246#0: *18075 http request count:2 blk:0
2011/09/21 11:40:21 [debug] 9246#0: *18075 http finalize request: -4,
"/s/169/file_906?" a:1, c:1
2011/09/21 11:40:21 [debug] 9246#0: *18075 set http keepalive handler

First finalise request is called with NGX_AGAIN and second immediate
call is made with NGX_DONE.
There is not success at all and the client does not receive the file.

Whole log segment:
2011/09/21 11:40:21 [debug] 9246#0: *18075 delete posted event 962CE210
2011/09/21 11:40:21 [debug] 9246#0: *18075 malloc: 0810BBE8:664
2011/09/21 11:40:21 [debug] 9246#0: *18075 malloc: 081136D8:1024
2011/09/21 11:40:21 [debug] 9246#0: *18075 posix_memalign: 08182280:8192 @16
2011/09/21 11:40:21 [debug] 9246#0: *18075 http process request line
2011/09/21 11:40:21 [debug] 9246#0: *18075 recv: fd:20 64 of 1024
2011/09/21 11:40:21 [debug] 9246#0: *18075 http request line: "GET
/s/169/file_906 HTTP/1.1"
2011/09/21 11:40:21 [debug] 9246#0: *18075 http uri: "/s/169/file_906"
2011/09/21 11:40:21 [debug] 9246#0: *18075 http args: ""
2011/09/21 11:40:21 [debug] 9246#0: *18075 http exten: ""
2011/09/21 11:40:21 [debug] 9246#0: *18075 http process request header line
2011/09/21 11:40:21 [debug] 9246#0: *18075 http header: "Host:
alabalanica.info"
2011/09/21 11:40:21 [debug] 9246#0: *18075 http header done
2011/09/21 11:40:21 [debug] 9246#0: *18075 rewrite phase: 0
2011/09/21 11:40:21 [debug] 9246#0: *18075 test location: "/"
2011/09/21 11:40:21 [debug] 9246#0: *18075 using configuration "/"
2011/09/21 11:40:21 [debug] 9246#0: *18075 http cl:-1 max:1024
2011/09/21 11:40:21 [debug] 9246#0: *18075 rewrite phase: 2
2011/09/21 11:40:21 [debug] 9246#0: *18075 rewrite phase: 3
2011/09/21 11:40:21 [debug] 9246#0: *18075 rewrite phase: 4
2011/09/21 11:40:21 [debug] 9246#0: *18075 rewrite phase: 5
2011/09/21 11:40:21 [debug] 9246#0: *18075 rewrite phase: 6
2011/09/21 11:40:21 [debug] 9246#0: *18075 http script complex value
2011/09/21 11:40:21 [debug] 9246#0: *18075 post rewrite phase: 7
2011/09/21 11:40:21 [debug] 9246#0: *18075 access phase: 8
2011/09/21 11:40:21 [debug] 9246#0: *18075 access phase: 9
2011/09/21 11:40:21 [debug] 9246#0: *18075 post access phase: 10
2011/09/21 11:40:21 [debug] 9246#0: *18075 http init upstream, client
timer: 0
2011/09/21 11:40:21 [debug] 9246#0: *18075 epoll add event: fd:20 op:3
ev:80000005
2011/09/21 11:40:21 [debug] 9246#0: *18075 http script copy: "1.1"
2011/09/21 11:40:21 [debug] 9246#0: *18075 http script var:
"/s/169/file_906"
2011/09/21 11:40:21 [debug] 9246#0: *18075 http cache key:
"1.1/s/169/file_906"
2011/09/21 11:40:21 [debug] 9246#0: *18075 add cleanup: 08182CE0
2011/09/21 11:40:21 [debug] 9246#0: *18075 http file cache exists: 0 e:1
2011/09/21 11:40:21 [debug] 9246#0: *18075 cache file:
"/cache/59/eb/5d23017f16d094f3c0da5caad144eb59"
2011/09/21 11:40:21 [debug] 9246#0: *18075 add cleanup: 08182D20
2011/09/21 11:40:21 [debug] 9246#0: *18075 http file cache fd: 18
2011/09/21 11:40:21 [debug] 9246#0: *18075 read: 18, 08182D6C, 355, 0
2011/09/21 11:40:21 [debug] 9246#0: *18075 http upstream cache: 0
2011/09/21 11:40:21 [debug] 9246#0: *18075 http proxy status 200 "200 OK"
2011/09/21 11:40:21 [debug] 9246#0: *18075 http proxy header: "Server:
nginx 1.0.4"
2011/09/21 11:40:21 [debug] 9246#0: *18075 http proxy header: "Date:
Wed, 21 Sep 2011 11:40:20 GMT"
2011/09/21 11:40:21 [debug] 9246#0: *18075 http proxy header:
"Content-Type: application/octet-stream"
2011/09/21 11:40:21 [debug] 9246#0: *18075 http proxy header:
"Connection: close"
2011/09/21 11:40:21 [debug] 9246#0: *18075 http proxy header:
"Content-Length: 4312"
2011/09/21 11:40:21 [debug] 9246#0: *18075 http proxy header:
"Last-Modified: Thu, 24 Mar 2011 14:32:53 GMT"
2011/09/21 11:40:21 [debug] 9246#0: *18075 http proxy header: "Expires:
Wed, 21 Sep 2011 11:45:18 GMT"
2011/09/21 11:40:21 [debug] 9246#0: *18075 http proxy header:
"Cache-Control: max-age=300"
2011/09/21 11:40:21 [debug] 9246#0: *18075 http proxy header:
"Accept-Ranges: bytes"
2011/09/21 11:40:21 [debug] 9246#0: *18075 http finalize request: -2,
"/s/169/file_906?" a:1, c:2
2011/09/21 11:40:21 [debug] 9246#0: *18075 http request count:2 blk:0
2011/09/21 11:40:21 [debug] 9246#0: *18075 http finalize request: -4,
"/s/169/file_906?" a:1, c:1
2011/09/21 11:40:21 [debug] 9246#0: *18075 set http keepalive handler
2011/09/21 11:40:21 [debug] 9246#0: *18075 http close request
2011/09/21 11:40:21 [debug] 9246#0: *18075 http log handler
2011/09/21 11:40:21 [debug] 9246#0: *18075 ngx_http_write_statistic:141
- r->uri.len [15] r->uri.data [/s/169/file_906]
2011/09/21 11:40:21 [debug] 9246#0: *18075 ngx_http_write_statistic:160
- r->connection->sent [0]
2011/09/21 11:40:21 [debug] 9246#0: *18075 ngx_http_write_statistic:164
- r->headers_out.status [0]

What could be the reason for this behaviour?

Thanks in advance
Toli


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Subject Author Views Posted

r->headers_out.status = 0

toli 1237 September 21, 2011 08:20AM

Re: r->headers_out.status = 0

Maxim Dounin 448 September 21, 2011 12:20PM

Re: r->headers_out.status = 0 Attachments

toli 485 September 26, 2011 03:48AM

Re: r->headers_out.status = 0

Maxim Dounin 492 September 26, 2011 07:10AM

Re: r->headers_out.status = 0

toli 472 September 29, 2011 06:02AM

Re: r->headers_out.status = 0

Maxim Dounin 423 September 30, 2011 05:16AM

Re: r->headers_out.status = 0

toli 513 September 30, 2011 05:26AM

Re: r->headers_out.status = 0

Maxim Dounin 460 September 30, 2011 06:30AM

Re: r->headers_out.status = 0

toli 516 September 30, 2011 06:36AM



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