Using Nginx with chunking (1 reply)

Hello,

I have nginx configured to send files in chunks to remote clients. The clients will contact the server to send it in chunks of 1 MB each. I am using nginx version 1.8.0


[root@ph-rdu-external-download-01 sbin]# ./nginx -V

nginx version: nginx/1.8.0

built by gcc 4.4.7 20120313 (Red Hat 4.4.7-4) (GCC)

built with OpenSSL 1.0.1e-fips 11 Feb 2013

TLS SNI support enabled

configure arguments: --user=nginx --group=nginx --prefix=/usr/local/nginx --lock-path=/var/lock/subsys/nginx --with-ld-opt=-Wl,-rpath,/usr/lib64 --with-debug --add-module=/root/integ/ngx_devel_kit-master/ --add-module=/root/integ/lua-nginx-module-0.9.15 --error-log-path=/var/log/nginx/error.log --http-log-path=/var/log/nginx/access.log --without-http_autoindex_module --without-http_fastcgi_module --with-http_ssl_module --without-http_geo_module --without-http_empty_gif_module --without-http_ssi_module --without-http_userid_module --without-mail_pop3_module --without-mail_imap_module --without-mail_smtp_module --without-http_uwsgi_module --without-http_scgi_module --with-http_realip_module --with-http_gzip_static_module --with-http_stub_status_module --with-ipv6

Currently I am running into an issue, where if the last chunk size is very small (few bytes), the server doesn’t seem to the send the chunk correctly because of which the clients would re-try again for the same chunk. For some reason it is not able to send the last chunk. I have attached the debug logs to the thread. If you see the logs the last three writes seem to be for the same chunk of size 6672 bytes

However if the last chunk size relatively large, then download succeeds without any issues. The issue is seen when the last chunk size is very small.

My current nginx configuration is as follows



http {

# Logging format

log_format main '$remote_addr - $remote_user [$time_local] ' '"$request_length" "$request_time" '

'"$request" $status $bytes_sent ' '"$body_bytes_sent" "$bytes_sent" ';

default_type application/octet-stream;

include mime.types;

keepalive_timeout 300 300;

keepalive_requests 8000;

charset utf-8;

source_charset utf-8;

# Check if it makes errors.

ignore_invalid_headers off;

recursive_error_pages on;

sendfile on;

server_tokens off;

tcp_nodelay on;

tcp_nopush off;

}

Regards,
Arun







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