Add IB Gateway auto-logoff detection#8
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When IB Gateway's auto-logoff timer fires, the TCP socket can linger without ib_async firing disconnectedEvent, leaving the daemon in a zombie-connected state with no reconnection triggered. This change adds a lightweight active health check (reqCurrentTimeAsync) to the monitor loop that detects stale sessions within seconds and forces reconnection. Changes: - IBProvider.check_health(): Pings gateway with 5s timeout, forces disconnect and reschedules reconnect on failure - IBProvider._force_disconnect(): Tears down stale connection and schedules exponential backoff reconnect - DaemonServer._monitor_loop: Calls check_health before drawdown check; on failure broadcasts disconnected event - BrokerProvider base class: Default no-op check_health() for non-IB providers - Tests: 5 new tests covering alive, timeout, exception, and edge cases Co-authored-by: Bryce Bjork <brycedbjork@gmail.com>
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Summary
Detects IB Gateway auto-logoff by actively polling the session every 5 seconds. When the session dies (auto-logoff timer fires or connection is lost), the daemon detects it within one monitor cycle and automatically reconnects using exponential backoff, rather than sitting indefinitely in a zombie-connected state.
Changes
reqCurrentTimeAsync()(5s timeout). Returns true if alive; on failure, forces disconnect and reschedules reconnect via existing exponential backoff.check_health()before the drawdown check. On failure, notifiesConnectionLossMonitorand broadcasts a disconnected event.check_health()for non-IB providers.All 102 existing tests pass; 5 new tests added.
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