id summary reporter owner description type status priority milestone component version resolution keywords cc uname nginx_version 1870 Large file download is not completed with sendfile option. jinyongchoi@… "Hi there. I found some issue in downloading test. the problem is only use 'sendfile on'. If 'sendfile_max_chunk' option or sendfile off is set in conf, download is ok. And i seem the problem is epoll(EPOLLET) and sendfile is not working well. If i remove EPOLLET option when event is NGX_WRITE_EVENT at ngx_epoll_add_event function in ngx_epoll_module.c, it working well. or in testing, if it cached the content file in kernel, it working well. (no used this command. 'echo 3 > /proc/sys/vm/drop_caches') i found similar issue.[https://trac.nginx.org/nginx/ticket/1174 #1174]. So, how i resolve this issue? Testing Host : Ubuntu 19.04 Steps to Reproduce: {{{ > mkdir -p /data0/nginx-data/ > truncate -s 10G /data0/nginx-data/10G.dat > docker run --name nginx-10G-test -v /data0/nginx-data/:/usr/share/nginx/html:ro -d nginx:1.17.4 > sudo su > export docker_ip=`docker inspect -f ""{{ .NetworkSettings.IPAddress }}"" nginx-10G-test` > echo 3 > /proc/sys/vm/drop_caches; curl -v -o /dev/null http://${docker_ip}/10G.dat * Expire in 0 ms for 6 (transfer 0x557ba829a5c0) * Trying 172.17.0.2... * TCP_NODELAY set * Expire in 200 ms for 4 (transfer 0x557ba829a5c0) % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0* Connected to 172.17.0.2 (172.17.0.2) port 80 (#0) > GET /10G.dat HTTP/1.1 > Host: 172.17.0.2 > User-Agent: curl/7.64.0 > Accept: */* > < HTTP/1.1 200 OK < Server: nginx/1.17.4 < Date: Fri, 11 Oct 2019 07:29:02 GMT < Content-Type: application/octet-stream < Content-Length: 10737418240 < Last-Modified: Fri, 11 Oct 2019 02:23:06 GMT < Connection: keep-alive < ETag: ""5d9fe78a-280000000"" < Accept-Ranges: bytes < { [65536 bytes data] 19 10.0G 19 2047M 0 0 33.7M 0 0:05:03 0:01:00 0:04:03 0* transfer closed with 8589938688 bytes remaining to read 19 10.0G 19 2047M 0 0 33.7M 0 0:05:03 0:01:00 0:04:03 0 * Closing connection 0 curl: (18) transfer closed with 8589938688 bytes remaining to read }}}" defect closed minor nginx-core 1.17.x fixed sendfile Linux x 5.0.0-31-generic #33-Ubuntu SMP Mon Sep 30 18:51:59 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux "nginx version: nginx/1.17.4 built by gcc 8.3.0 (Debian 8.3.0-6) built with OpenSSL 1.1.1c 28 May 2019 TLS SNI support enabled configure arguments: --prefix=/etc/nginx --sbin-path=/usr/sbin/nginx --modules-path=/usr/lib/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='-g -O2 -fdebug-prefix-map=/data/builder/debuild/nginx-1.17.4/debian/debuild-base/nginx-1.17.4=. -fstack-protector-strong -Wformat -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fPIC' --with-ld-opt='-Wl,-z,relro -Wl,-z,now -Wl,--as-needed -pie'"