Opened 4 months ago

Last modified 4 months ago

#2012 accepted defect

Wrong header Connection, when keepalive is disabled

Reported by: seregaizsbera@… Owned by:
Priority: minor Milestone:
Component: nginx-core Version: 1.18.x
Keywords: keepalive Cc:
uname -a: Linux myhost 2.6.32-042stab142.1 #1 SMP Tue Jan 28 23:44:17 MSK 2020 x86_64 x86_64 x86_64 GNU/Linux
nginx -V: nginx version: nginx/1.18.0
built by gcc 4.8.5 20150623 (Red Hat 4.8.5-39) (GCC)
built with OpenSSL 1.0.2k-fips 26 Jan 2017
TLS SNI support enabled
configure arguments: --prefix=/etc/nginx --sbin-path=/usr/sbin/nginx --modules-path=/usr/lib64/nginx/modules --conf-path=/etc/nginx/nginx.conf --error-log-path=/var/log/nginx/error.log --http-log-path=/var/log/nginx/access.log --pid-path=/var/run/nginx.pid --lock-path=/var/run/nginx.lock --http-client-body-temp-path=/var/cache/nginx/client_temp --http-proxy-temp-path=/var/cache/nginx/proxy_temp --http-fastcgi-temp-path=/var/cache/nginx/fastcgi_temp --http-uwsgi-temp-path=/var/cache/nginx/uwsgi_temp --http-scgi-temp-path=/var/cache/nginx/scgi_temp --user=nginx --group=nginx --with-compat --with-file-aio --with-threads --with-http_addition_module --with-http_auth_request_module --with-http_dav_module --with-http_flv_module --with-http_gunzip_module --with-http_gzip_static_module --with-http_mp4_module --with-http_random_index_module --with-http_realip_module --with-http_secure_link_module --with-http_slice_module --with-http_ssl_module --with-http_stub_status_module --with-http_sub_module --with-http_v2_module --with-mail --with-mail_ssl_module --with-stream --with-stream_realip_module --with-stream_ssl_module --with-stream_ssl_preread_module --with-cc-opt='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic -fPIC' --with-ld-opt='-Wl,-z,relro -Wl,-z,now -pie'

Description

I disabled keepalive with directives keepalive_timeout 0 and keepalive_requests 0, but nginx continues to return header Connection: keep-alive.

Steps to reproduce

curl -v http://mydomain.org

Expected response

Server: nginx
Date: Sat, 04 Jul 2020 21:52:23 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 225
Connection: close
my-trace: myhost-abcd

Actual response

Server: nginx
Date: Sat, 04 Jul 2020 21:52:23 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 225
Connection: keep-alive
my-trace: myhost-abcd

My nginx -T output is in attached file.

Attachments (1)

nginx-T.txt (6.9 KB ) - added by seregaizsbera@… 4 months ago.
nginx -T

Download all attachments as: .zip

Change History (4)

by seregaizsbera@…, 4 months ago

Attachment: nginx-T.txt added

nginx -T

comment:1 by seregaizsbera@…, 4 months ago

When I rearrange this configuration

keepalive_requests 0;
keepalive_timeout 0;
server {
    listen 80;
    return 404 "some text";
}

into this

keepalive_requests 0;
keepalive_timeout 0;
server {
    listen 80;
    location / {
        return 404 "some text";
    }
}

nginx returns correct Connection header.

comment:2 by Maxim Dounin, 4 months ago

Thanks, it's a known issue that keepalive settings are applied incorrectly when a response is returned without selecting a location.

comment:3 by Maxim Dounin, 4 months ago

Status: newaccepted
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