nginx with proxy_cache_use_stale not returning from cache when connection refused

[new299]

Thanks, I've tried this. My amended configuration is below. However, I'm
still getting the same error when the upstream goes away. The cache
directory is now being populated correctly however. Any ideas?

----------

user www-data;
worker_processes 4;
pid /run/nginx.pid;

events {
        worker_connections 768;
        # multi_accept on;
}

http {
        upstream localsvr {
                server localhost:8080;
        }

        proxy_cache_path  /data/nginx/cache levels=1:2 keys_zone=one:8m
max_size=5000m inactive=300m;
        access_log /var/log/nginx/access.log;
        error_log /var/log/nginx/error.log;
        server {
                keepalive_timeout 65;
                types_hash_max_size 2048;
                proxy_buffering on;

                default_type application/octet-stream;

                gzip on;
                gzip_disable "msie6";
                listen 80;
                proxy_cache one;
                proxy_cache_min_uses 1;
                proxy_cache_valid 200 302 10m;
                proxy_cache_valid any      10m;
                proxy_set_header Host $host;
                location / {
                        proxy_pass http://localsvr;
                        proxy_cache_use_stale error;
                        proxy_next_upstream error;
                        proxy_redirect off;
                }
        }
}

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,255408,255440#msg-255440