id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	uname	nginx_version
2403	http request has no response, the configure with 'master_process  off and listen reuseport'	bullerdu@…		"When the following configuration is used, no response is received when sending an http request.

{{{

user  root;

master_process              off;
worker_processes            4;
worker_cpu_affinity         auto;

error_log  logs/error.log  debug;

pid        logs/nginx.pid;

#load_module modules/ngx_http_image_filter_module.so;

events {
    use                 epoll;
    accept_mutex        off;
    worker_connections  102400;
}

http {
    include       mime.types;
    default_type  application/octet-stream;

    #log_format  main  '$remote_addr - $remote_user [$time_local] ""$request"" '
    #                  '$status $body_bytes_sent ""$http_referer"" '
    #                  '""$http_user_agent"" ""$http_x_forwarded_for""';

    #access_log  logs/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65;

    #gzip  on;

    server {
        listen 80 reuseport;

        location / {
            return 200 ""ok"";
        }
    }
}

}}}

the result with no response:

{{{

$curl -sv 'localhost:80/'
* About to connect() to localhost port 80 (#0)
*   Trying 127.0.0.1...
* Connected to localhost (127.0.0.1) port 80 (#0)
> GET / HTTP/1.1
> User-Agent: curl/7.29.0
> Host: localhost
> Accept: */*
>
^C

}}}


The fault occurs because worker_processes enable multiple processes with 'listen 80 reuseport;' in the master off mode. 
My question is, since master_process off conflicts with worker_processes, why does nginx not disable worker_processes to configure multiple processes in master off mode


A patch that solves this configuration problem is listed below.


{{{
diff --git a/src/core/ngx_connection.c b/src/core/ngx_connection.c
index fe729a78..ab210dd8 100644
--- a/src/core/ngx_connection.c
+++ b/src/core/ngx_connection.c
@@ -112,6 +112,10 @@ ngx_clone_listening(ngx_cycle_t *cycle, ngx_listening_t *ls)

     ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);

+    if (ccf->master == 0) {
+        return NGX_OK;
+    }
+
     for (n = 1; n < ccf->worker_processes; n++) {

         /* create a socket for each worker process */
}}}
"	defect	closed	minor		documentation	1.23.x	fixed	reuseport,master_process,worker_processes		Linux cdn-dev011164234021.na61 4.19.91-008.ali4000.alios7.x86_64 #1 SMP Fri Sep 4 17:33:26 CST 2020 x86_64 x86_64 x86_64 GNU/Linux	"nginx version: nginx/1.23.2
built by gcc 6.5.1 20220324 (GCC)
configure arguments: --prefix=/home/yefei.dyf/nginx"