Synapse 1.64.0rc1 (2022-07-26)

As of this release, Synapse no longer allows the tasks of verifying email address ownership, and password reset confirmation, to be delegated to an identity server. For more information, see the upgrade notes.

We have also stopped building .deb packages for Ubuntu 21.10 as it is no longer an active version of Ubuntu.

Features

• Improve error messages when media thumbnails cannot be served. (#13038)
• Allow pagination from remote event after discovering it from MSC3030 /timestamp_to_event. (#13205)
• Add a room_type field in the responses for the list room and room details admin APIs. Contributed by @andrewdoh. (#13208)
• Add support for room version 10. (#13220)
• Add per-room rate limiting for room joins. For each room, Synapse now monitors the rate of join events in that room, and throttles additional joins if that rate grows too large. (#13253, #13254, #13255, #13276)
• Support Implicit TLS (TLS without using a STARTTLS upgrade, typically on port 465) for sending emails, enabled by the new option force_tls. Contributed by Jan Schär. (#13317)

Bugfixes

• Fix a bug introduced in Synapse 1.15.0 where adding a user through the Synapse Admin API with a phone number would fail if the enable_email_notifs and email_notifs_for_new_users options were enabled. Contributed by @thomasweston12. (#13263)
• Fix a bug introduced in Synapse 1.40.0 where a user invited to a restricted room would be briefly unable to join. (#13270)
• Fix a long-standing bug where, in rare instances, Synapse could store the incorrect state for a room after a state resolution. (#13278)
• Fix a bug introduced in v1.18.0 where the synapse_pushers metric would overcount pushers when they are replaced. (#13296)
• Disable autocorrection and autocapitalisation on the username text field shown during registration when using SSO. (#13350)
• Update locked version of frozendict to 2.3.3, which has fixes for memory leaks affecting /sync. (#13284, #13352)

Improved Documentation

• Provide an example of using the Admin API. Contributed by @jejo86. (#13231)
• Move the documentation for how URL previews work to the URL preview module. (#13233, #13261)
• Add another contrib script to help set up worker processes. Contributed by @villepeh. (#13271)
• Document that certain config options were added or changed in Synapse 1.62. Contributed by @behrmann. (#13314)
• Document the new rc_invites.per_issuer throttling option added in Synapse 1.63. (#13333)
• Mention that BuildKit is needed when building Docker images for tests. (#13338)
• Improve Caddy reverse proxy documentation. (#13344)

Deprecations and Removals

• Drop tables that were formerly used for groups/communities. (#12967)
• Drop support for delegating email verification to an external server. (#13192)
• Drop support for calling /_matrix/client/v3/account/3pid/bind without an id_access_token, which was not permitted by the spec. Contributed by @Vetchu. (#13239)
• Stop building .deb packages for Ubuntu 21.10 (Impish Indri), which has reached end of life. (#13326)

Internal Changes

• Use lower transaction isolation level when purging rooms to avoid serialization errors. Contributed by Nick @ Beeper. (#12942)
• Remove code which incorrectly attempted to reconcile state with remote servers when processing incoming events. (#12943)
• Make the AS login method call Auth.get_user_by_req for checking the AS token. (#13094)
• Always use a version of canonicaljson that supports the C implementation of frozendict. (#13172)
• Add prometheus counters for ephemeral events and to device messages pushed to app services. Contributed by Brad @ Beeper. (#13175)
• Refactor receipts servlet logic to avoid duplicated code. (#13198)
• Preparation for database schema simplifications: populate state_key and rejection_reason for existing rows in the events table. (#13215)
• Remove unused database table event_reference_hashes. (#13218)
• Further reduce queries used sending events when creating new rooms. Contributed by Nick @ Beeper (@Fizzadar). (#13224)
• Call the v2 identity service /3pid/unbind endpoint, rather than v1. Contributed by @Vetchu. (#13240)
• Use an asynchronous cache wrapper for the get event cache. Contributed by Nick @ Beeper (@Fizzadar). (#13242, #13308)
• Optimise federation sender and appservice pusher event stream processing queries. Contributed by Nick @ Beeper (@Fizzadar). (#13251)
• Log the stack when waiting for an entire room to be un-partial stated. (#13257)
• Fix spurious warning when fetching state after a missing prev event. (#13258)
• Clean-up tests for notifications. (#13260)
• Do not fail build if complement with workers fails. (#13266)
• Don't pull out state in compute_event_context for unconflicted state. (#13267, #13274)
• Reduce the rebuild time for the complement-synapse docker image. (#13279)
• Don't pull out the full state when creating an event. (#13281, #13307)
• Upgrade from Poetry 1.1.12 to 1.1.14, to fix bugs when locking packages. (#13285)
• Make DictionaryCache expire full entries if they haven't been queried in a while, even if specific keys have been queried recently. (#13292)
• Use HTTPStatus constants in place of literals in tests. (#13297)
• Improve performance of query _get_subset_users_in_room_with_profiles. (#13299)
• Up batch size of bulk_get_push_rules and _get_joined_profiles_from_event_ids. (#13300)
• Remove unnecessary json.dumps from tests. (#13303)
• Reduce memory usage of sending dummy events. (#13310)
• Prevent formatting changes of #3679 from appearing in git blame. (#13311)
• Change get_users_in_room and get_rooms_for_user caches to enable pruning of old entries. (#13313)
• Validate federation destinations and log an error if a destination is invalid. (#13318)
• Fix FederationClient.get_pdu() returning events from the cache as outliers instead of original events we saw over federation. (#13320)
• Reduce memory usage of state caches. (#13323)
• Reduce the amount of state we store in the state_cache. (#13324)
• Add missing type hints to open tracing module. (#13328, #13345, #13362)
• Remove old base slaved store and de-duplicate cache ID generators. Contributed by Nick @ Beeper (@Fizzadar). (#13329, #13349)
• When reporting metrics is enabled, use ~8x less data to describe DB transaction metrics. (#13342)
• Faster room joins: skip soft fail checks while Synapse only has partial room state, since the current membership of event senders may not be accurately known. (#13354)