Commit Graph

2 Commits

Author SHA1 Message Date
Joseph Doherty c39bcd6e24 fix(opcuaclient): unresolvable acks warn instead of tripping the ack breaker; shutdown holds subscription management (review r1 N-1, N-2, N-3)
- N-1 (Important): m3's BadNodeIdUnknown throw for an ack with no resolvable
  condition counted toward the host's AlarmAcknowledge breaker (threshold 5), so
  re-acks of one unresolvable condition blocked every genuine ack. It now logs a
  Warning and returns; only a no-reply transport failure throws. Test through the
  real CapabilityInvoker: six unresolvable acks, then a genuine ack that is still
  delivered (red with the throw restored).
- N-2: ShutdownAsync holds _subscriptionGate for the whole teardown (in-flight
  subscribes finish first, bounded by the budget), so a subscribe arriving during
  the delete phase finds the session released instead of creating a subscription
  on the closing session. Red-tested.
- N-3: the shutdown-side cert-validation detach is generation-checked under
  _probeLock with the map / endpoint clear.

Refs #743

Claude-Session: https://claude.ai/code/session_01Ub9hGmYLQvn9XETzw7CMsT
2026-10-22 16:58:37 -04:00
Joseph Doherty 6c3a754be9 fix(opcuaclient): lifecycle generation, close the local session on init throw, one teardown budget (R06:O-2, O-9)
- Every InitializeAsync/ShutdownAsync bumps a lifecycle generation. The session,
  namespace map and endpoint are installed under _probeLock only while the init's
  generation is current, so an init the host abandoned that finishes after the next
  shutdown discards its session instead of resurrecting it. Every health write
  (lifecycle, keep-alive, publish-error, read path) is generation-stamped, so a late
  writer can no longer overwrite newer state.
- O-2: the init catch closes and disposes the LOCAL session it opened (it closed the
  still-null Session property, orphaning an activated session + keep-alive timer).
- O-9: ShutdownAsync spends ONE budget (4 s, inside the host's 5 s PostStop budget) on
  wire calls: every subscription delete concurrently, then the session close with
  what remains; waits are abandoned when the budget fires even if the SDK ignores the
  token. It used to be 5 s per subscription, serially.

Refs #743

Claude-Session: https://claude.ai/code/session_01Ub9hGmYLQvn9XETzw7CMsT
2026-10-22 15:19:48 -04:00