Issue with uploading 1 GB file via nginx - node.js

Question

We are using nginx as used as load balancer behind sails server is running. We have to upload 1 Gb file to the server. We are using angular js as front end. When we upload 1 GB file into the server it shows upload progress as 99% then after that it shows 400 error code.
While looking in to the error logs it show client prematurely closed connection
We tried client_body_in_file_only and upload module. But fails
How can we solve this issue?
Our Nginx conf is
load_module modules/ngx_http_upload_module.so;
user www-data;
worker_processes auto;
pid /run/nginx.pid;
events {
worker_connections 768;
}
http {
##
# Basic Settings
##
sendfile on;
tcp_nopush on;
tcp_nodelay on;
keepalive_timeout 360;
types_hash_max_size 2048;
proxy_ignore_client_abort on;
proxy_buffering off;
include /etc/nginx/mime.types;
default_type application/octet-stream;
##
# SSL Settings
##
ssl_protocols TLSv1 TLSv1.1 TLSv1.2; # Dropping SSLv3, ref: POODLE
ssl_prefer_server_ciphers on;
##
# Logging Settings
##
access_log /var/log/nginx/access.log;
error_log /var/log/nginx/error.log info;
##
# Gzip Settings
##
gzip on;
gzip_disable "msie6";
upstream api{
ip_hash;
server 127.0.0.1:1337;
}
server {
client_max_body_size 2048M;
client_body_buffer_size 2048M;
client_body_timeout 50m;
client_header_timeout 50m;
send_timeout 50m;
listen 80;
# location /test/upload {
# add_header 'Access-Control-Allow-Origin' *;
# #add_header 'Access-Control-Allow-Headers' 'Content-Type';
# add_header 'Access-Control-Allow-Credentials' 'true' always;
# add_header 'Access-Control-Allow-Methods' 'GET, POST, PUT, DELETE, OPTIONS' always;
# add_header 'Access-Control-Allow-Headers' 'Accept,Authorization,Cache-Control,Content-Type,DNT,If-Modified-Since,Keep-Alive,Origin,User-Agent,X-Requested-With' always;
# # required to be able to read Authorization header in frontend
# add_header 'Access-Control-Expose-Headers' 'Authorization' always;
# # Pass altered request body to this location
# upload_pass #upload;
#
# # Store files to this directory
# # The directory is hashed, subdirectories 0 1 2 3 4 5 6 7 8 9 should exist
# upload_store /tmp;
#
# # Allow uploaded files to be read only by user
# upload_store_access user:r;
#
# # Set specified fields in request body
# upload_set_form_field $upload_field_name.name "$upload_file_name";
# upload_set_form_field $upload_field_name.content_type "$upload_content_type";
# upload_set_form_field $upload_field_name.path "$upload_tmp_path";
#
# # Inform backend about hash and size of a file
# upload_aggregate_form_field "$upload_field_name.md5" "$upload_file_md5";
# upload_aggregate_form_field "$upload_field_name.size" "$upload_file_size";
#
# upload_pass_form_field "^submit$|^description$|^account$";
#
# upload_cleanup 400 404 499 500-505;
# }
location #upload {
proxy_send_timeout 50m;
proxy_read_timeout 50m;
proxy_pass http://api;
proxy_http_version 1.1;
proxy_redirect off;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Real-IP $remote_addr;
}
location / {
proxy_send_timeout 50m;
proxy_read_timeout 50m;
proxy_pass http://api;
proxy_http_version 1.1;
proxy_redirect off;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Real-IP $remote_addr;
}
location /test/upload {
proxy_send_timeout 50m;
proxy_read_timeout 50m;
proxy_pass http://api;
proxy_http_version 1.1;
proxy_redirect off;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Real-IP $remote_addr;
client_body_in_file_only clean;
client_body_buffer_size 16K;
client_body_temp_path /tmp;
}
}
}