Merge fix/670-opcuaclient-session-loss: OpcUaClient upstream session loss goes Bad and recovers (#670)

2026-10-11 08:41:48 -04:00
parent d803e0eab4 b028322568
commit db6446ce73
14 changed files with 1208 additions and 281 deletions
@@ -302,7 +302,9 @@ non-`Healthy` state **and** its `LastSuccessfulRead` has been frozen for 90 s. T
  success. Each conjunct has a test that goes red when the *other* is deleted.
 - **The mechanism rests on every driver reaching a non-Healthy state on sustained failure.** Surveyed across
  all 12: nine poll drivers via `Degraded`, MQTT via live connection state, Galaxy via its reconnect
-  supervisor. `CalculationDriver` reports `Healthy` while running and so can never trip — correct, as it has
+  supervisor, OpcUaClient via a bad session keep-alive (#670 — it used to stay `Healthy` forever; its SDK
+  `SessionReconnectHandler` is deleted, a lost session publishes `BadNoCommunication` once per outage and the
+  watchdog's re-init is the recovery; good keep-alives + notifications advance `LastSuccessfulRead`). `CalculationDriver` reports `Healthy` while running and so can never trip — correct, as it has
  no transport. Re-check this if a new driver lands.
 - **The reconnect retry MUST tear down before re-initialising — FIXED in both drivers, keep it that way.**
  `ModbusDriver` (`_transport`) and `MqttDriver` (`_connection`) used to overwrite an `IAsyncDisposable`