id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	uname	nginx_version
1199	nginx sends traffic to all or some of the upstrems	shubhamitc@…		"Nginx is sending traffic to more than 1 upstream, that is causing us to process the same request in multiple backend systems. 
Creating multiple charging to end user. 
Nginx configuration,

events {
    worker_connections  1024;
}

worker_rlimit_nofile 10240;

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""';
   # log_format combinedt '$remote_addr - $remote_user [$time_local] '
    #                '""$request"" $status $body_bytes_sent '
    #                '""$http_referer"" ""$http_user_agent"" ""$request_time"" '
    #                '""$http_x_forwarded_for"" ""$http_x_operamini_phone_ua"" '
    #                '""$http_x_device_user_agent"" $upstream_addr';

    log_format combinedt '$remote_addr $host $server_name $remote_user [$time_local] '
                    '""$request"" $status $body_bytes_sent '
                    '""$http_referer"" ""$http_user_agent"" ""$request_time"" '
		    '""$http_x_forwarded_for"" ""$http_x_operamini_phone_ua"" '
		    '""$http_x_device_user_agent""' '""$http_x_up_calling_line_id""' '""$http_productId"" to: $upstream_addr  ""HE :: device_user_agent:"" $http_x_device_user_agent ""HE : : up_calling_line_id:"" $http_x_up_calling_line_id ""HE :: msisdn:"" $http_msisdn ""HE :: du_msisdn:"" $http_x_du_msisdn ""HE :: x_msisdn:"" $http_x_msisdn ""HE :: nokia_msisdn:"" $http_x_nokia_msisdn ""HE :: radius_1:"" $http_x_radius_1 ""HE :: radius_2:"" $http_x_radius_2 ""ARGS::"" $args ';

    #access_log  logs/access.log  main;

    sendfile        on;
    #tcp_nopush     on;
    tcp_nopush     on;
    tcp_nodelay    off;
    #keepalive_timeout  0;
    keepalive_timeout  65;

    #gzip  on;
    proxy_connect_timeout    25;
    proxy_read_timeout       60;
    proxy_send_timeout       25;
    proxy_buffer_size        16k;
    proxy_buffers            4 64k;
    proxy_busy_buffers_size 128k;
    proxy_temp_file_write_size 128k;
    proxy_temp_path  /dev/shm/vtemp_dir;
    proxy_cache_path /dev/shm/vcache_dir levels=1:2
                     keys_zone=cache_one:10m
                     inactive=3d max_size=3g;
upstream  vuconnect {
        server 192.168.254.81:8080;
        server 192.168.254.82:8080;
        server 192.168.254.83:8080;
        }

server {
        listen 7777;
        server_name     192.168.254.91;
        access_log      logs/access.log combinedt;

        location / {
        proxy_pass http://vuconnect;
        proxy_read_timeout 250s;
        proxy_redirect    off;
        proxy_set_header  Host $host;
        proxy_set_header  X-Real-IP $remote_addr;
        proxy_set_header  X-Forwarded-For    $proxy_add_x_forwarded_for;
        proxy_set_header  X-Forwarded-Proto  http;
        }
}
}

Log received,

eslog.2017-01-28.10.bz2:192.168.254.94 192.168.254.9 192.168.254.91 - [28/Jan/2017:10:46:03 +0000] ""GET /vuconnect/billing?msisdn=21629xxxxxx&transactionID=null&billingCode=1341343074&parentbillingCode=1341343074&activityType=renewal&callbackURL=http://xxxxxx.com&authToken=null&activityResult=Success&requestTypeId=2&chargingMode=backend&itemId=26817&itemTypeId=4&languageId=1&subscriptionStatusId=4 HTTP/1.1"" 200 490 ""-"" ""Jakarta Commons-HttpClient/3.1"" ""86.906"" ""-"" ""-"" ""-""""-""""-"" to: 192.168.254.81:8080, 192.168.254.82:8080  ""HE :: device_user_agent:"" - ""HE : : up_calling_line_id:"" - ""HE :: msisdn:"" - ""HE :: du_msisdn:"" - ""HE :: x_msisdn:"" - ""HE :: nokia_msisdn:"" - ""HE :: radius_1:"" - ""HE :: radius_2:"" - ""ARGS::"" msisdn=216296XXXXX&transactionID=null&billingCode=1341343074&parentbillingCode=1341343074&activityType=renewal&callbackURL=http://xxxxxxx.com&authToken=null&activityResult=Success&requestTypeId=2&chargingMode=backend&itemId=26817&itemTypeId=4&languageId=1&subscriptionStatusId=4

"	defect	closed	blocker		other	1.8.x	invalid	multiple upstream	ops@…	Linux nginx-baas91 2.6.32-504.el6.x86_64 #1 SMP Wed Oct 15 04:27:16 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux	"nginx version: nginx/1.8.1
built by gcc 4.4.7 20120313 (Red Hat 4.4.7-11) (GCC) 
built with OpenSSL 1.0.1e-fips 11 Feb 2013
TLS SNI support enabled
configure arguments: --prefix=/usr/local/nginx --with-http_stub_status_module --with-http_ssl_module"