proxy_cache_valid 200 204 180d;
proxy_cache_use_stale error timeout updating http_502 http_503 http_504;
proxy_cache_background_update on;
+ proxy_next_upstream error timeout invalid_header http_500 http_503;
+ proxy_next_upstream_tries 3;
+ proxy_intercept_errors on;
+ proxy_next_upstream_timeout 30s;
<% else -%>
# Override QUERY_STRING to force mapserver query parameters