Hello,

In my module I do something like this:
nlog->action = "sending file to client";
r->headers_out.status = NGX_HTTP_OK;
r->headers_out.content_length_n = bucket->content_length;
r->headers_out.last_modified_time = of.mtime;
r->headers_out.content_type.len = sizeof ("text/html") - 1;
r->headers_out.content_type.data = (u_char *) "text/html";
rc = ngx_http_send_header(r);
if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
ngx_log_error(NGX_LOG_ALERT, nlog, ngx_errno, ngx_close_file_n "ngx_http_send_header failed");
return rc;
}


it’s ok when traffic is low, but when there are many user request to nginx, error log is full of these similar errors:

2015/09/17 08:57:16 [alert] 9915#0: *5205 close()ngx_http_send_header failed while sending file to client, client: 127.0.0.1, server: my.local, request: "GET /slides/128553.pdf?secl=LMz1w4xNwd9pt_88-ROxkw&sect=1442496276 HTTP/1.0", host: “m http://kvazar.china-cdn88nmbwacdnln8hq8qwe.com/y.server.com", referrer: "http://my.server.com/uppod.swf http://uakino.net/uppod.swf”



Is this a normal behavior, or there much be something wrong in my module cause nginx cannot send header to client?


Thanks,

Hưng

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