ProxyWarning

ProxyWarning = "config_invalid" | "config_incomplete" | "decide_failed" | "decide_unavailable" | "rewrite_failed" | "upstream_failed" | "tenant_unreachable" | "body_too_large" | "decided"

The code passed to ProxyAdapter.warn. A misconfigured or failing proxy serves the site unmodified instead of returning an error, so a warning is often the only sign that something is wrong. decided is not a fault: it is reported for every page the proxy rewrites, with its mode and outcome.