This is a hotfix release addressing the database migration issue introduced in 26.3.0. If you got hit by that, this is the fix — no configuration changes required.
Optional: Disable Relay's DNS Caching
A few users have reported that the relay container fails to authenticate against web after a fresh install or restart. The culprit is DNS caching that the Relay team enabled via Hickory DNS, it can cause stale resolution under certain networking setups.
If you're running into this, you can work around it by applying the patch from PR #4213. We're likely making this the default in the next release, so consider this a heads-up.
Notable Changes
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Size Analysis is GA (demo video here) — the feature is now generally available, though we're holding off on including it in the default self-hosted install until the Emerge-related dependencies stabilize. Looking to experiment? You can enable it manually in the meantime.
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Reduced downtime during upgrades — we've reordered the installation sequence (PR #4202) so Docker images are pulled before the Compose stack is taken down. If you're on a slower connection, you should notice meaningfully less downtime on future upgrades.
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Graduated feature flags cleanup — since late February, there's been an ongoing effort to remove a large batch of graduated feature flags. Worth a look if you want to know which features are now enabled by default in self-hosted.
Questions or want to talk through your setup? We're on Sentry's Discord — always happy to chat.