Fix TOCTOU race condition in FutureOrdersController idempotency check causing 23505 constraint violations - #1812
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📝 WalkthroughWalkthroughOrder-chain creation now returns structured metadata for new or duplicate idempotency-key requests. Services and controllers use this metadata to build responses and select ChangesOrder-chain idempotency
Estimated code review effort: 4 (Complex) | ~45 minutes Mergeability Score: 🟡 Moderate · up to Creating an order chain with reminders can return incomplete reminder metadata on the initial 201 response, while a later duplicate request returns it. This inconsistency can affect clients that depend on the creation response, so the response mapping should be corrected before merging. Sequence Diagram(s)sequenceDiagram
participant Client
participant OrdersController
participant OrderRequestService
participant OrderRepository
participant insertorderchain_idempotent
Client->>OrdersController: Submit order chain
OrdersController->>OrderRequestService: Register order chain
OrderRequestService->>OrderRepository: Create order chain
OrderRepository->>insertorderchain_idempotent: Insert with idempotency handling
insertorderchain_idempotent-->>OrderRepository: Return new or existing chain metadata
OrderRepository-->>OrderRequestService: Return OrderChainCreateResult
OrderRequestService-->>OrdersController: Return NotificationOrderChainResponse
OrdersController-->>Client: Return 201 Created or 200 OK
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Actionable comments posted: 4
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Inline comments:
In
`@components/api/src/Altinn.Notifications.Persistence/Migration/FunctionsAndProcedures/insertorderchain.sql`:
- Line 1: Update the instant-order insertion path using insertorderchain_v3 and
OrderRepository so duplicate requests preserve the PostgreSQL 23505 error
contract instead of returning NULL and causing InvalidCastException; use a
strict insert function for instant orders or update every instant-order caller
and its API contract to handle duplicate results explicitly, while retaining
nullable duplicate behavior for non-instant orders.
In
`@components/api/src/Altinn.Notifications.Persistence/Repository/OrderRepository.cs`:
- Around line 141-145: Update the duplicate-chain branch in OrderRepository to
select GetComposedOrderChainTracking for OrderType.Composed and
GetOrderChainTracking for other order types. If the selected tracking query
returns null, treat it as an unexpected persistence failure rather than
returning (null, null), while preserving the existing return for a successfully
found tracking record.
- Line 53: Separate the SQL used by normal/composed chain insertion from the SQL
used by instant-order insertion in OrderRepository. Keep _insertOrderChainSql
calling the conflict-tolerant function for non-instant chains, and add a strict
SQL command calling the non-v3 insert function for all three instant-order
insertion methods so duplicate chains continue returning the established 23505
error.
In
`@components/api/test/Altinn.Notifications.IntegrationTests/Notifications.Persistence/OrderRepositoryTests.cs`:
- Line 2933: The duplicate-chain tests at OrderRepositoryTests.cs:2933-2933 and
OrderRepositoryTests.cs:4316-4316 must validate the new idempotency contract
instead of expecting PostgreSQL 23505: for the second Create call, assert
NewOrders is null, the returned chain receipt is the original chain, and no
duplicate order is persisted; apply the same assertions to the composed-chain
case after composed-chain tracking.
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components/api/src/Altinn.Notifications.Core/Persistence/IOrderRepository.cscomponents/api/src/Altinn.Notifications.Core/Services/ComposedEmailOrderRequestService.cscomponents/api/src/Altinn.Notifications.Core/Services/OrderRequestService.cscomponents/api/src/Altinn.Notifications.Persistence/Migration/FunctionsAndProcedures/insertorderchain.sqlcomponents/api/src/Altinn.Notifications.Persistence/Repository/OrderRepository.cscomponents/api/test/Altinn.Notifications.IntegrationTests/Notifications.Persistence/OrderRepositoryTests.cscomponents/api/test/Altinn.Notifications.Tests/Notifications.Core/TestingServices/ComposedEmailOrderRequestServiceTests.cscomponents/api/test/Altinn.Notifications.Tests/Notifications.Core/TestingServices/OrderRequestServiceTests.cs
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Inline comments:
In
`@components/api/src/Altinn.Notifications/Controllers/InstantOrdersController.cs`:
- Around line 189-200: Update the UniqueViolation recovery block in
ProcessInstantOrderAsync to handle OperationCanceledException from
RetrieveTrackingInformation and return the same HTTP 499 response used for
cancellation in the main try path. Preserve the existing response for a
recovered tracking record and rethrow unexpected duplicate-recovery failures.
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components/api/src/Altinn.Notifications.Persistence/Repository/OrderRepository.cscomponents/api/src/Altinn.Notifications/Controllers/InstantOrdersController.cscomponents/api/test/Altinn.Notifications.IntegrationTests/Notifications.Persistence/OrderRepositoryTests.cs
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rest with a brief reason, keep changes minimal, and validate.
Inline comments:
In
`@components/api/src/Altinn.Notifications.Persistence/Migration/FunctionsAndProcedures/insertorderchainidempotency.sql`:
- Around line 30-33: In the migration containing
notifications.insertorderchain_idempotency, add a CREATE UNIQUE INDEX IF NOT
EXISTS for orderschain on (idempotencyid, creatorname, type) before the function
definition, ensuring the index matches the ON CONFLICT target and supports
duplicate blocking even when type is nullable.
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components/api/src/Altinn.Notifications.Persistence/Migration/FunctionsAndProcedures/insertorderchainidempotency.sqlcomponents/api/src/Altinn.Notifications.Persistence/Repository/OrderRepository.cs
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Actionable comments posted: 1
🧹 Nitpick comments (1)
components/api/test/Altinn.Notifications.IntegrationTests/Notifications.Persistence/OrderRepositoryTests.cs (1)
2913-2924: 🩺 Stability & Availability | 🔵 Trivial | ⚡ Quick winAdd a concurrent idempotency regression test.
Lines 2913-2914 invoke
Createserially. This test cannot exercise the former check-then-insert interleaving. Start both requests concurrently with the same creator and idempotency ID. Assert that exactly one result is newly created and that both results return the original chain and shipment identifiers.🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the rest with a brief reason, keep changes minimal, and validate. In `@components/api/test/Altinn.Notifications.IntegrationTests/Notifications.Persistence/OrderRepositoryTests.cs` around lines 2913 - 2924, Update the test around the two sut.Create calls to start both requests concurrently with the same creator and idempotency ID, rather than awaiting them serially. Await both tasks together, then assert exactly one result has IsNewlyCreated true and both results return firstOrderChainId and firstOrderId.
🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
Inline comments:
In
`@components/api/src/Altinn.Notifications.Core/Services/OrderRequestService.cs`:
- Line 645: Rework the OrderRequestService request flow so duplicate idempotency
keys are atomically reserved or resolved before recipient processing, including
order creation and contact-point lookup. Ensure retries return the existing
order chain without depending on current contact data, and do not add a separate
read-then-create check. Add an integration test covering a duplicate request
after contact lookup conditions change.
---
Nitpick comments:
In
`@components/api/test/Altinn.Notifications.IntegrationTests/Notifications.Persistence/OrderRepositoryTests.cs`:
- Around line 2913-2924: Update the test around the two sut.Create calls to
start both requests concurrently with the same creator and idempotency ID,
rather than awaiting them serially. Await both tasks together, then assert
exactly one result has IsNewlyCreated true and both results return
firstOrderChainId and firstOrderId.
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components/api/src/Altinn.Notifications.Persistence/Migration/v0.95/01-functions-and-procedures.sqlis excluded by!components/api/src/Altinn.Notifications.Persistence/Migration/v*/*functions-and-procedures.sql
📒 Files selected for processing (17)
components/api/src/Altinn.Notifications.Core/Models/Orders/NotificationOrderChainResponse.cscomponents/api/src/Altinn.Notifications.Core/Models/Orders/OrderChainCreateResult.cscomponents/api/src/Altinn.Notifications.Core/Persistence/IOrderRepository.cscomponents/api/src/Altinn.Notifications.Core/Services/ComposedEmailOrderRequestService.cscomponents/api/src/Altinn.Notifications.Core/Services/OrderRequestService.cscomponents/api/src/Altinn.Notifications.Persistence/Migration/FunctionsAndProcedures/insertorderchain.sqlcomponents/api/src/Altinn.Notifications.Persistence/Repository/OrderRepository.cscomponents/api/src/Altinn.Notifications/Controllers/ComposedEmailOrdersController.cscomponents/api/src/Altinn.Notifications/Controllers/FutureOrdersController.cscomponents/api/test/Altinn.Notifications.IntegrationTests/Notifications.Persistence/OrderRepositoryTests.cscomponents/api/test/Altinn.Notifications.IntegrationTests/Notifications/ComposedEmailOrdersController/ComposedEmailOrdersControllerTests.cscomponents/api/test/Altinn.Notifications.IntegrationTests/Notifications/FutureOrdersController/FutureOrdersControllerTests.cscomponents/api/test/Altinn.Notifications.Tests/Notifications.Core/TestingServices/ComposedEmailOrderRequestServiceTests.cscomponents/api/test/Altinn.Notifications.Tests/Notifications.Core/TestingServices/OrderRequestServiceTests.cscomponents/api/test/Altinn.Notifications.Tests/Notifications/TestingControllers/ComposedEmailOrdersControllerTests.cscomponents/api/test/Altinn.Notifications.Tests/Notifications/TestingControllers/FutureOrdersControllerTests.cscomponents/api/test/Altinn.Notifications.Tests/Notifications/TestingMappers/NotificationOrderChainResponseMapperTests.cs
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- components/api/src/Altinn.Notifications.Core/Services/ComposedEmailOrderRequestService.cs
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added 3 commits
August 13, 2026 11:24
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Inline comments:
In
`@components/api/src/Altinn.Notifications.Persistence/Migration/FunctionsAndProcedures/insertorderchainidempotent.sql`:
- Around line 40-49: Update the successful insert branch of
insertorderchainidempotent to return reminder metadata from
_orderchain->'Reminders' instead of an empty JSON array. Reuse the duplicate
branch’s mapping so each reminder includes its shipment ID and sender reference,
while preserving the existing return values for newly created chains without
reminders.
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components/api/src/Altinn.Notifications.Persistence/Migration/FunctionsAndProcedures/insertorderchain.sqlcomponents/api/src/Altinn.Notifications.Persistence/Migration/FunctionsAndProcedures/insertorderchainidempotent.sqlcomponents/api/src/Altinn.Notifications.Persistence/Repository/OrderRepository.cs
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- components/api/src/Altinn.Notifications.Persistence/Migration/FunctionsAndProcedures/insertorderchain.sql
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- components/api/src/Altinn.Notifications.Persistence/Repository/OrderRepository.cs
added 4 commits
August 13, 2026 14:50
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martivj
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Aug 14, 2026
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Nice, the new OrderChainCreateResult makes things easier to understand in the OrderRequestService as well.
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Description
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Summary by CodeRabbit
New Features
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201 Created; existing requests return200 OK.