rcourtman 99e5a38534 Fix critical monitoring system issues and add robustness improvements ... This commit addresses 9 critical issues identified during the monitoring system audit: **Race Conditions Fixed:** - PBS backup pollers: Moved lock earlier to eliminate check-then-act race (lines 7316-7378) - PVE backup poll timing: Fixed double write to lastPVEBackupPoll with proper synchronization (lines 5927-5977) - Docker hosts cleanup: Refactored to avoid holding both m.mu and s.mu locks simultaneously (lines 1911-1937) **Context Propagation Fixed:** - Replaced all context.Background() calls with parent context for proper cancellation chain: - PBS backup poller (line 7367) - PVE backup poller (line 5955) - PBS fallback check (line 7154) **Memory Leak Prevention:** - Added cleanup for guest metadata cache (10 minute TTL, lines 1942-1957) - Added cleanup for diagnostic snapshots (1 hour TTL, lines 1959-1987) - Added cleanup for RRD cache (1 minute TTL, lines 1989-2007) - All cleanup methods called on 10-second ticker (lines 3791-3793) **Panic Recovery:** - Added recoverFromPanic helper to log panics with stack traces (lines 1910-1920) - Protected all critical goroutines: - poll (line 4020) - taskWorker (line 4200) - retryFailedConnections (line 3851) - checkMockAlerts (line 8896) - pollPVEInstance (line 4886) - pollPBSInstance (line 7164) - pollPMGInstance (line 7498) **Import Fixes:** - Added missing sync import to email_enhanced.go - Added missing os import to queue.go All fixes maintain proper lock ordering and release locks before calling methods that acquire other locks to prevent deadlocks.		2025-11-07 08:52:37 +00:00
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concurrency_test.go	Fix settings security tab navigation	2025-10-11 23:29:47 +00:00
email_enhanced.go	Fix critical monitoring system issues and add robustness improvements	2025-11-07 08:52:37 +00:00
email_providers.go	Fix settings security tab navigation	2025-10-11 23:29:47 +00:00
email_template.go	Fix settings security tab navigation	2025-10-11 23:29:47 +00:00
notifications.go	Implement queue cancellation and atomic DB operations (P1 fixes)	2025-11-07 08:33:09 +00:00
notifications_test.go	Add test notification functionality for Apprise	2025-11-05 18:54:18 +00:00
queue.go	Fix critical monitoring system issues and add robustness improvements	2025-11-07 08:52:37 +00:00
webhook_enhanced.go	Document layered retry semantics (P2 documentation)	2025-11-07 08:35:00 +00:00
webhook_templates.go	Fix settings security tab navigation	2025-10-11 23:29:47 +00:00