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feat(host): LDAP directory-outage circuit — fail-fast denial during sustained outage (03/S2)

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Joseph Doherty
2026-07-13 11:56:45 -04:00
parent 21abe42a90
commit 0c785415a2
3 changed files with 240 additions and 8 deletions
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archreview/plans/R2-08-ldap-historyread-async-plan.md.tasks.json
+1 -1
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@@ -5,7 +5,7 @@
{ "id": "R2-08-T2", "subject": "LdapOptions: ConnectionTimeoutMs/AuthTimeoutMs/MaxConcurrentAuthentications/OutageFailureThreshold/OutageCooldownSeconds + ToLibraryOptions projection + validator rules", "status": "completed", "blockedBy": [] },
{ "id": "R2-08-T3", "subject": "LdapAuthResult.IsSystemFailure seam + OtOpcUaLdapAuthService.Adapt mapping (ServiceAccountBindFailed => system-side)", "status": "completed", "blockedBy": [] },
{ "id": "R2-08-T4", "subject": "LdapOpcUaUserAuthenticator: WaitAsync wall-clock bound + SemaphoreSlim concurrency cap with release-on-core-completion (turns T1 green)", "status": "completed", "blockedBy": ["R2-08-T1", "R2-08-T2"] },
{ "id": "R2-08-T5", "subject": "Directory-outage circuit: fail-fast deny after N consecutive system-side failures, half-open after cooldown", "status": "pending", "blockedBy": ["R2-08-T3", "R2-08-T4"] },
{ "id": "R2-08-T5", "subject": "Directory-outage circuit: fail-fast deny after N consecutive system-side failures, half-open after cooldown", "status": "completed", "blockedBy": ["R2-08-T3", "R2-08-T4"] },
{ "id": "R2-08-T6", "subject": "Outage-sim integration test (real library, unroutable host, via internal HandleImpersonation) + SDK m_eventLock contract doc + docs/security.md", "status": "pending", "blockedBy": ["R2-08-T4"] },
{ "id": "R2-08-T7", "subject": "S3 sequential-serving repro test (RED): MaxObservedConcurrency >= 2 on an 8-node Raw batch — fails on current code", "status": "pending", "blockedBy": [] },
{ "id": "R2-08-T8", "subject": "ServerHistorianOptions: HistoryReadBatchParallelism/MaxConcurrentHistoryReadBatches/HistoryReadDeadline + Validate warnings + node-manager properties + hosted-service wiring", "status": "pending", "blockedBy": [] },