Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
Agent ProxyArea: what it touches
Internal ChangesKind: in v2.1.251,
Internal ChangesSection of the release
What
When the agent-proxy relay starts with a reachability probe configured, it opens a loopback WebSocket, pushes enough data that backpressure should register, and verifies the runtime actually reports queued bytes. If it does not, the relay logs a warning and sends telemetry, because the tunnel's upload throttling relies on that number.
Details
Runs whenever the relay's startup probe is set, not behind a separate feature flag.
Warning states the upload gate cannot engage on that runtime; the relay still starts.
Evidence
WebSocket.bufferedAmount stays 0 with bytes queued: the upload gate cannot engage on this runtime
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
