nginx config spdy connection interrupted issue

gistfile1.txt

ssl_certificate /etc/ssl/private/mydomain.com.crt;
ssl_certificate_key /etc/ssl/private/mydomain.com.key;
ssl_session_cache shared:SSL:10m;
ssl_session_timeout 10m;
# forward secrecy config, from https://community.qualys.com/blogs/securitylabs/2013/08/05/configuring-apache-nginx-and-openssl-for-forward-secrecy
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_prefer_server_ciphers on;
ssl_ciphers ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-RC4-SHA:ECDHE-RSA-RC4-SHA:ECDH-ECDSA-RC4-SHA:ECDH-RSA-RC4-SHA:ECDHE-RSA-AES256-SHA:DHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA:RC4-SHA;

# redirect all http traffic to https
server {
	charset utf-8;
	listen 80;
	server_name mydomain.com www.mydomain.com;
	return 301 https://mydomain.com$request_uri;
}

server {
	charset utf-8;
	server_name mydomain.com;
	listen 443 ssl spdy;

	root /var/www/mydomain.com;
	index index.html;

	access_log /var/log/nginx/mydomain.com_access.log;
	error_log /var/log/nginx/mydomain.com_error.log;

	client_max_body_size 10m;

	location / {
		try_files $uri $uri/ /index.html;
	}

	location /packages {
		auth_basic "Restricted";
		auth_basic_user_file /etc/nginx/htpasswd-group;

		alias /backup/packages;
		try_files $uri $uri/ /packages/;
		fancyindex on;
		fancyindex_exact_size off;
		fancyindex_localtime on;
		fancyindex_header "/fancyindex/header.html";
		fancyindex_footer "/fancyindex/footer.html";
	}

	location /fancyindex {
		auth_basic "Restricted";
		auth_basic_user_file /etc/nginx/htpasswd-group;

		alias /var/www/fancyindex;

		try_files $uri $uri/;
	}
}