id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc,uname,nginx_version 2163,nginx suddenly stop accepting request & returns 499,vijaysridhar03@…,,"Hi , we have nginx in our production , where we have configured with below Server block . nginx is working fine for 1day , after that it slowly start returning 499 error code for some request & later all request were returning 499 . restart of nginx fix the issue for some time . we have other server block ( all other http based proxy_pass) in this same nginx which all are running fine . Also as part of OS upgrade nginx was upgraded from nginx-1:1.16.1-1 to nginx-1:1.16.1-3 , not sure if this is causing the issue added resolver as part of troubleshooting as we are using domain name in the proxypass . mysite.api.prod.vijay.com is the cloudfare where server { listen 9876; server_name 192.168.100.123; keepalive_timeout 10; location / { resolver 4.4.4.4; proxy_ssl_server_name on; proxy_pass https://mysite.api.prod.vijay.com/speed/send; } }",defect,closed,blocker,,nginx-core,1.16.x,invalid,,,Linux vijay.com 3.10.0-1160.15.2.el7.x86_64 #1 SMP Wed Feb 3 15:06:38 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux,"nginx version: nginx/1.16.1 built by gcc 4.8.5 20150623 (Red Hat 4.8.5-44) (GCC) built with OpenSSL 1.1.1c FIPS 28 May 2019 (running with OpenSSL 1.1.1g FIPS 21 Apr 2020) TLS SNI support enabled configure arguments: --prefix=/usr/share/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 --http-client-body-temp-path=/var/lib/nginx/tmp/client_body --http-proxy-temp-path=/var/lib/nginx/tmp/proxy --http-fastcgi-temp-path=/var/lib/nginx/tmp/fastcgi --http-uwsgi-temp-path=/var/lib/nginx/tmp/uwsgi --http-scgi-temp-path=/var/lib/nginx/tmp/scgi --pid-path=/run/nginx.pid --lock-path=/run/lock/subsys/nginx --user=nginx --group=nginx --with-file-aio --with-ipv6 --with-http_ssl_module --with-http_v2_module --with-http_realip_module --with-stream_ssl_preread_module --with-http_addition_module --with-http_xslt_module=dynamic --with-http_image_filter_module=dynamic --with-http_sub_module --with-http_dav_module --with-http_flv_module --with-http_mp4_module --with-http_gunzip_module --with-http_gzip_static_module --with-http_random_index_module --with-http_secure_link_module --with-http_degradation_module --with-http_slice_module --with-http_stub_status_module --with-http_perl_module=dynamic --with-http_auth_request_module --with-mail=dynamic --with-mail_ssl_module --with-pcre --with-pcre-jit --with-stream=dynamic --with-stream_ssl_module --with-google_perftools_module --with-debug --with-cc-opt='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -m64 -mtune=generic' --with-ld-opt='-Wl,-z,relro -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -Wl,-E' "