Client.Shared-005: _activeDataSubscriptions (a plain Dictionary) and the
_activeAlarmSubscription tuple were mutated from the caller thread, the
keep-alive failover path, and DisconnectAsync with no synchronization,
risking bucket corrosion / InvalidOperationException / lost entries.
Added a dedicated _subscriptionLock and wrapped every read/write of that
bookkeeping state inside it (Subscribe/Unsubscribe[Alarms]Async,
Disconnect, Dispose, and the snapshot/clear/re-record steps of
ReplaySubscriptionsAsync). Awaited adapter calls stay outside the lock so
it is never held across I/O.
Client.Shared-006: HandleKeepAliveFailureAsync had only a non-atomic
state check guarding re-entry, so two bad keep-alives could each start a
failover loop, racing to dispose/replace _session and double-replaying
subscriptions. It now claims an atomic _failoverInProgress slot via
Interlocked.CompareExchange; a re-entrant call returns immediately. The
loop body moved to RunFailoverAsync, wrapped in try/finally that resets
the flag.
Tests: added KeepAliveFailure_ReentrantWhileFailoverInFlight_RunsFailoverOnce
and SubscribeAndUnsubscribe_ConcurrentCalls_DoNotCorruptState regression
tests; made the FakeSubscriptionAdapter / FakeSessionAdapter /
FakeSessionFactory test doubles thread-safe (and added a CreateGate hook)
so the concurrency tests exercise production locking rather than fake
state. All 138 Client.Shared tests pass.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Reviewed all 31 src/ production projects against the 10-category
checklist in REVIEW-PROCESS.md. Each module gets its own findings.md;
code-reviews/README.md is regenerated from them.
334 findings: 6 Critical, 46 High, 126 Medium, 156 Low.
Critical findings:
- Server-001: WriteNodeIdUnknown recurses unconditionally — a HistoryRead
on an unresolvable node crashes the process (remote DoS).
- Admin-001/002: app-wide auth bypass (RouteView not AuthorizeRouteView)
plus unauthenticated mutating routes.
- Core.Scripting-001: System.Environment reachable from operator scripts;
Environment.Exit() terminates the server.
- Core.AlarmHistorian-001: rowIds/events parallel-list desync on a corrupt
payload misapplies outcomes — silent alarm-event data loss.
- Driver.Galaxy-001: ReconnectSupervisor is built but never triggered, so
a transient gateway drop permanently kills the event stream.
All findings are Status=Open; resolution is tracked per REVIEW-PROCESS.md
section 4. Review only — no source code changed.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
