Final Cut Server is a Java application (made by Apple) which launches from a web page. I have Nginx in front of this web server (amongst others) and, whilst the web server can be browsed externally, the Java app fails to launch correctly and throws the errors below. Can anyone offer clues as to what additional config I many have to add to Nginx to get this working?

My existing Nginx config:

user xxxx;
worker_processes 4;
pid /var/run/nginx.pid;


events {
        worker_connections 1024;
        # multi_accept on;
}

http {

        sendfile on;
        tcp_nopush on;
        tcp_nodelay on;
        keepalive_timeout 65;
        types_hash_max_size 2048;

        include /etc/nginx/conf/mime.types;
        default_type application/octet-stream;

        access_log /var/log/nginx/access.log;
        error_log /var/log/nginx/error.log;

        gzip on;
        gzip_disable "msie6";

        server {
                server_name _;
                return 444;
        }

upstream fcs-site {
    server 10.10.5.20:8080;
}

server {

        listen                  80;
        server_name             example.com 10.10.5.90;

        access_log  /var/log/nginx/fcs_access.log;
        error_log  /var/log/nginx/fcs_error.log;

        location / {
                proxy_set_header        Host $host;
                proxy_set_header        X-Real-IP $remote_addr;
                proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
                proxy_set_header        X-Forwarded-Proto $scheme;

                client_max_body_size    10m;
                client_body_buffer_size 128k;
                proxy_connect_timeout   60s;
                proxy_send_timeout      90s;
                proxy_read_timeout      90s;
                proxy_buffering         off;
                proxy_temp_file_write_size 64k;
                proxy_pass http://fcs-site;
                proxy_redirect          off;
                }

        }

upstream myapp-site {
    server 127.0.0.1:6543;
}

server {

        listen                  80;
        server_name             otherexample.com   www.otherexample.com;
        rewrite                 ^ https://$server_name$request_uri? permanent;
        }

server {

        listen                  443;

        ssl                     on;
        ssl_certificate         /etc/ssl/otherapp.crt;
        ssl_certificate_key     /etc/ssl/otherapp.key;

        server_name  otherexample.com      www.otherexample.com;

        access_log  /var/log/nginx/otherapp_access.log;
        error_log  /var/log/nginx/other_error.log;

        location / {
                proxy_set_header        Host $host;
                proxy_set_header        X-Real-IP $remote_addr;
                proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
                proxy_set_header        X-Forwarded-Proto $scheme;

                client_max_body_size    10m;
                client_body_buffer_size 128k;
                proxy_connect_timeout   60s;
                proxy_send_timeout      90s;
                proxy_read_timeout      90s;
                proxy_buffering         off;
                proxy_temp_file_write_size 64k;
                proxy_pass http://myapp-site;
                proxy_redirect          off;
                }

        location /static {
                root                    /www;
                expires                 30d;
                add_header              Cache-Control public;
                access_log              off;
                }
        }

Java errors:

com.sun.deploy.net.FailedDownloadException: Unable to load resource: http://example.com:8080/FinalCutServer/FinalCutServer_mac.jnlp at com.sun.deploy.net.DownloadEngine.actionDownload(Unknown Source) at com.sun.deploy.net.DownloadEngine._downloadCacheEntry(Unknown Source) at com.sun.deploy.cache.ResourceProviderImpl.getResourceCacheEntry(Unknown Source) at com.sun.deploy.cache.ResourceProviderImpl.getResourceCacheEntry(Unknown Source) at com.sun.deploy.cache.ResourceProviderImpl.getResource(Unknown Source) at com.sun.javaws.Launcher.updateFinalLaunchDesc(Unknown Source) at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source) at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source) at com.sun.javaws.Launcher.launch(Unknown Source) at com.sun.javaws.Main.launchApp(Unknown Source) at com.sun.javaws.Main.continueInSecureThread(Unknown Source) at com.sun.javaws.Main.access$000(Unknown Source) at com.sun.javaws.Main$1.run(Unknown Source) at java.lang.Thread.run(Thread.java:722)

java.net.ConnectException: Operation timed out at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339) at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200) at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:391) at java.net.Socket.connect(Socket.java:579) at java.net.Socket.connect(Socket.java:528) at sun.net.NetworkClient.doConnect(NetworkClient.java:180) at sun.net.www.http.HttpClient.openServer(HttpClient.java:378) at sun.net.www.http.HttpClient.openServer(HttpClient.java:473) at sun.net.www.http.HttpClient.(HttpClient.java:203) at sun.net.www.http.HttpClient.New(HttpClient.java:290) at sun.net.www.http.HttpClient.New(HttpClient.java:306) at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:995) at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:931) at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:849) at com.sun.deploy.net.BasicHttpRequest.doRequest(Unknown Source) at com.sun.deploy.net.BasicHttpRequest.doRequest(Unknown Source) at com.sun.deploy.net.BasicHttpRequest.doGetRequest(Unknown Source) at com.sun.deploy.net.DownloadEngine.actionDownload(Unknown Source) at com.sun.deploy.net.DownloadEngine._downloadCacheEntry(Unknown Source) at com.sun.deploy.cache.ResourceProviderImpl.getResourceCacheEntry(Unknown Source) at com.sun.deploy.cache.ResourceProviderImpl.getResourceCacheEntry(Unknown Source) at com.sun.deploy.cache.ResourceProviderImpl.getResource(Unknown Source) at com.sun.javaws.Launcher.updateFinalLaunchDesc(Unknown Source) at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source) at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source) at com.sun.javaws.Launcher.launch(Unknown Source) at com.sun.javaws.Main.launchApp(Unknown Source) at com.sun.javaws.Main.continueInSecureThread(Unknown Source) at com.sun.javaws.Main.access$000(Unknown Source) at com.sun.javaws.Main$1.run(Unknown Source) at java.lang.Thread.run(Thread.java:722)