Cold starts after upgrading to Umbraco 17

cheeseytoastie · December 11, 2025, 9:10am

Weirdly was just reading the release notes on 17.0.2 and there’s this:

github.com/umbraco/Umbraco-CMS

Sync: Fix SyncBootStateAccessor to use ILastSyncedManager to prevent unnecessary cold boots

main ← v17/bugfix/sync-boot-state-use-ilastsyncedmanager

opened 11:45AM - 10 Dec 25 UTC

nikolajlauridsen

+100 -5

## Summary - Fix `SyncBootStateAccessor` to use the new `ILastSyncedManager` int…erface instead of the deprecated `LastSyncedFileManager` - This resolves an issue where cold boots were being triggered every time because the old `LastSyncedFileManager` was not being updated - Add backwards-compatible obsolete constructors using `StaticServiceProvider` to avoid breaking changes ## Test plan - [x] Run the new integration tests: `dotnet test --filter "FullyQualifiedName~SyncBootStateAccessorTest"` - [x] Verify cold boot is triggered on fresh install (no last synced ID in database) - [x] Verify warm boot is triggered when a valid last synced external ID exists with a corresponding cache instruction - [x] Verify existing code using the old constructor signature still compiles (with obsolete warning) 🤖 Generated with [Claude Code](https://claude.com/claude-code)