Opened 4 years ago
Closed 4 years ago
#2160 closed defect (worksforme)
Cache loader process doesn't exit after master process is stopped with SIGQUIT.
| Reported by: | Owned by: | ||
|---|---|---|---|
| Priority: | minor | Milestone: | |
| Component: | documentation | Version: | 1.15.x |
| Keywords: | Cc: | ||
| uname -a: | Linux store-lb-129k 4.19.0-14-cloud-amd64 #1 SMP Debian 4.19.171-2 (2021-01-30) x86_64 GNU/Linux | ||
| nginx -V: |
nginx version: openresty/1.15.8.2
built by gcc 8.3.0 (Debian 8.3.0-6) built with OpenSSL 1.1.1d 10 Sep 2019 TLS SNI support enabled configure arguments: --prefix=/usr/share/nginx/nginx --with-debug --with-cc-opt='-DNGX_LUA_USE_ASSERT -DNGX_LUA_ABORT_AT_PANIC -O2 -I/usr/include/ossp' --add-module=../ngx_devel_kit-0.3.1rc1 --add-module=../echo-nginx-module-0.61 --add-module=../xss-nginx-module-0.06 --add-module=../ngx_coolkit-0.2 --add-module=../set-misc-nginx-module-0.32 --add-module=../form-input-nginx-module-0.12 --add-module=../encrypted-session-nginx-module-0.08 --add-module=../srcache-nginx-module-0.31 --add-module=../ngx_lua-0.10.15 --add-module=../ngx_lua_upstream-0.07 --add-module=../headers-more-nginx-module-0.33 --add-module=../array-var-nginx-module-0.05 --add-module=../memc-nginx-module-0.19 --add-module=../redis2-nginx-module-0.15 --add-module=../redis-nginx-module-0.3.7 --add-module=../rds-json-nginx-module-0.15 --add-module=../rds-csv-nginx-module-0.09 --add-module=../ngx_stream_lua-0.0.7 --with-ld-opt='-Wl,-rpath,/usr/share/nginx/luajit/lib -lossp-uuid' --sbin-path=/usr/sbin/nginx --conf-path=/etc/nginx/nginx.conf --http-log-path=/var/log/nginx/access.log --error-log-path=/var/log/nginx/error.log --pid-path=/var/run/nginx.pid --with-compat --with-pcre-jit --with-http_ssl_module --with-ipv6 --lock-path=/var/lock/nginx.lock --http-client-body-temp-path=/var/lib/nginx/body --http-fastcgi-temp-path=/var/lib/nginx/fastcgi --http-proxy-temp-path=/var/lib/nginx/proxy --http-scgi-temp-path=/var/lib/nginx/scgi --http-uwsgi-temp-path=/var/lib/nginx/uwsgi --with-http_gzip_static_module --with-openssl=/build/openssl/openssl-1.1.1d --with-http_realip_module --with-http_ssl_module --with-http_realip_module --with-http_auth_request_module --with-http_gunzip_module --with-file-aio --with-threads --with-http_stub_status_module --with-http_geoip_module --with-http_gunzip_module --with-http_sub_module --with-http_v2_module --add-module=/build/modules/ngx_cache_purge-2.3 --add-module=/build/modules/nginx-module-vts-0.1.18 --with-stream --with-stream_ssl_module --with-stream_ssl_preread_module |
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Description
When gracefully shutting down nginx with SIGQUIT, if the cache loader process is still running (we have large caches of lots of small files) then it will hold up nginx from quitting. It seems like the master process isn't passing this signal onto the cache loader.
After SIGQUIT to nginx, workers are in process of shutting down:
# ps aux | grep nginx | grep -vE "(grep|mtail)" root 18737 0.0 0.0 2660400 16544 ? Ss 23:32 0:00 nginx: master process /usr/sbin/nginx -g daemon on; master_process on; www-data 19174 55.8 0.6 2746968 223120 ? S< 23:33 1:46 nginx: worker process is shutting down www-data 19178 17.2 0.4 2692984 134156 ? S< 23:33 0:32 nginx: worker process is shutting down www-data 19180 5.8 0.2 2674952 87192 ? S< 23:33 0:11 nginx: worker process is shutting down www-data 19187 16.6 0.4 2658824 163728 ? R 23:33 0:31 nginx: cache loader process root 22216 0.0 0.0 32828 3736 pts/1 S+ 23:35 0:00 systemctl stop nginx.service root 22220 0.1 0.0 2304 820 ? Ss 23:35 0:00 /sbin/start-stop-daemon --quiet --stop --retry QUIT/300/TERM/5/KILL/5 --pidfile /run/nginx.pid
After all the workers have stopped, nginx is lingering due to the cache loader still running:
# ps aux | grep nginx | grep -vE "(grep|mtail)" root 18737 0.0 0.0 2660400 16544 ? Ss 23:32 0:00 nginx: master process /usr/sbin/nginx -g daemon on; master_process on; www-data 19187 19.2 1.0 2658824 343776 ? S 23:33 0:56 nginx: cache loader process root 22216 0.0 0.0 32828 3736 pts/1 S+ 23:35 0:00 systemctl stop nginx.service root 22220 0.1 0.0 2304 820 ? Ss 23:35 0:00 /sbin/start-stop-daemon --quiet --stop --retry QUIT/300/TERM/5/KILL/5 --pidfile /run/nginx.pid
Sending SIGQUIT directly to the cache loader will stop it and allow nginx to finish up:
# kill -s SIGQUIT 19187 # ps aux | grep nginx | grep -vE "(grep|mtail)"
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It looks like you are using heavily patched fork of nginx and with many 3rd party modules. Are you able to reproduce the issue with vanilla nginx as available from nginx.org, without any 3rd party patches and modules?