Synapse 1.58.0rc1 (2022-04-26)

As of this release, the groups/communities feature in Synapse is now disabled by default. See #11584 for details. As mentioned in the upgrade notes, this feature will be removed in Synapse 1.61.

Features

• Implement MSC3383 for including the destination in server-to-server authentication headers. Contributed by @Bubu and @jcgruenhage for Famedly. (#11398)
• Docker images and Debian packages from matrix.org now contain a locked set of Python dependencies, greatly improving build reproducibility. (Board, #11537)
• Enable processing of device list updates asynchronously. (#12365, #12465)
• Implement MSC2815 to allow room moderators to view redacted event content. Contributed by @tulir @ Beeper. (#12427)
• Build Debian packages for Ubuntu 22.04 "Jammy Jellyfish". (#12543)

Bugfixes

• Prevent a sync request from removing a user's busy presence status. (#12213)
• Fix bug with incremental sync missing events when rejoining/backfilling. Contributed by Nick @ Beeper. (#12319)
• Fix a long-standing bug which incorrectly caused GET /_matrix/client/v3/rooms/{roomId}/event/{eventId} to return edited events rather than the original. (#12476)
• Fix a bug introduced in Synapse 1.27.0 where the admin API for deleting forward extremities would always return a count of 1, no matter how many extremities were deleted. (#12496)
• Fix a long-standing bug where the image thumbnails embedded into email notifications were broken. (#12510)
• Fix a bug in the implementation of MSC3202 where Synapse would use the field name device_unused_fallback_keys, rather than device_unused_fallback_key_types. (#12520)
• Fix a bug introduced in Synapse 0.99.3 which could cause Synapse to consume large amounts of RAM when back-paginating in a large room. (#12522)

Improved Documentation

• Fix rendering of the documentation site when using the 'print' feature. (#12340)
• Add a manual documenting config file options. (#12368, #12527)
• Update documentation to reflect that both the run_background_tasks_on option and the options for moving stream writers off of the main process are no longer experimental. (#12451)
• Update worker documentation and replace old federation_reader with generic_worker. (#12457)
• Strongly recommend Poetry for development. (#12475)
• Add some example configurations for workers and update architectural diagram. (#12492)
• Fix a broken link in README.rst. (#12495)
• Add HAProxy delegation example with CORS headers to docs. (#12501)
• Remove extraneous comma in User Admin API's device deletion section so that the example JSON is actually valid and works. Contributed by @olmari. (#12533)

Deprecations and Removals

• The groups/communities feature in Synapse is now disabled by default. (#12344)
• Remove unstable identifiers from MSC3440. (#12382)

Internal Changes

• Preparation for faster-room-join work: start a background process to resynchronise the room state after a room join. (#12394)
• Preparation for faster-room-join work: Implement a tracking mechanism to allow functions to wait for full room state to arrive. (#12399)
• Remove an unstable identifier from MSC3083. (#12395)
• Run CI in the locked Poetry environment, and remove corresponding tox jobs. (#12425, #12434, #12438, #12441, #12449, #12478, #12514, #12472)
• Change Mutual Rooms' unstable_features flag to uk.half-shot.msc2666.mutual_rooms which matches the current iteration of MSC2666. (#12445)
• Fix typo in the release script help string. (#12450)
• Fix a minor typo in the Debian changelogs generated by the release script. (#12497)
• Reintroduce the list of targets to the linter script, to avoid linting unwanted local-only directories during development. (#12455)
• Limit length of device_id to less than 512 characters. (#12454)
• Dockerfile-workers: reduce the amount we install in the image. (#12464)
• Dockerfile-workers: give the master its own log config. (#12466)
• complement-synapse-workers: factor out separate entry point script. (#12467)
• Back out experimental implementation of MSC2314. (#12474)
• Fix grammatical error in federation error response when the room version of a room is unknown. (#12483)
• Remove unnecessary configuration overrides in tests. (#12511)
• Refactor the relations code for clarity. (#12519)
• Add type hints so docker and stubs directories pass mypy --disallow-untyped-defs. (#12528)
• Update delay_cancellation to accept any awaitable, rather than just Deferreds. (#12468)
• Handle cancellation in EventsWorkerStore._get_events_from_cache_or_db. (#12529)