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Type: Task
Resolution: Unresolved
Priority: Major - P3
Fix Version/s: None
Affects Version/s: 8.3.0-rc0
Component/s: None
Labels:
None

Assigned Teams:

Catalog and Routing
Sprint:
CAR Team 2025-10-27, CAR Team 2025-11-10, CAR Team 2025-11-24
CAR Domain/s:

🟩 Routing and Topology

Aha! Reference:
None
Tracking Level:
None
Risk Status:
None
Exec Notes:
None
Goal Name(s):
None
Goal Link:
None

Add a RAII helper FixedOperationFCVRegion that acquires an snapshot of the Global Server FCV, and sets it as the VersionContext decoration over the caller's OperationContext.
The decoration is unset when it is destructed.

While the object is in scope, the caller's OperationContext gets a stable view of feature flags, lifting the restrictions explained in ~~SERVER-91221~~.
The VersionContext is also replicated in the oplog, so the stability extends to the application of any op that is emitted while the object is in scope.

depends on

SERVER-111443 Allow tagging Operation FCV to be propagated or not across shards

Closed

SERVER-111444 Never replicate Operation FCV in the oplog in FCV <8.2

Closed

is depended on by

SERVER-111450 Acquire Operation FCV for replica set create DDL operations

In Progress

SERVER-112431 Review documentation for shard-local OFCV & VersionContext

Backlog

is related to

SERVER-91221 Catalog and Routing: Audit feature flag checks for unsafe races with setFCV

Closed

Assignee:: Pierlauro Sciarelli
Reporter:: Joan Bruguera Micó
Participants:: Joan Bruguera Micó, Pierlauro Sciarelli
Votes:: 0 Vote for this issue
Watchers:: 2 Start watching this issue

Created:: Sep 25 2025 08:25:22 AM UTC
Updated:: Nov 10 2025 09:43:24 AM UTC

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