Synapse 1.60.0 (2022-05-31)

This release of Synapse adds a unique index to the state_group_edges table, in
order to prevent accidentally introducing duplicate information (for example,
because a database backup was restored multiple times). If your Synapse database
already has duplicate rows in this table, this could fail with an error and
require manual remediation.

Additionally, the signature of the check_event_for_spam module callback has changed.
The previous signature has been deprecated and remains working for now. Module authors
should update their modules to use the new signature where possible.

See the upgrade notes
for more details.

Bugfixes

• Fix a bug introduced in Synapse 1.60.0rc1 that would break some imports from synapse.module_api. (#12918)

Synapse 1.60.0rc2 (2022-05-27)

Features

• Add an option allowing users to use their password to reauthenticate for privileged actions even though password login is disabled. (#12883)

Bugfixes

• Explicitly close ijson coroutines once we are done with them, instead of leaving the garbage collector to close them. (#12875)

Internal Changes

• Improve URL previews by not including the content of media tags in the generated description. (#12887)

Synapse 1.60.0rc1 (2022-05-24)

Features

• Measure the time taken in spam-checking callbacks and expose those measurements as metrics. (#12513)
• Add a default_power_level_content_override config option to set default room power levels per room preset. (#12618)
• Add support for MSC3787: Allowing knocks to restricted rooms. (#12623)
• Send USER_IP commands on a different Redis channel, in order to reduce traffic to workers that do not process these commands. (#12672, #12809)
• Synapse will now reload cache config when it receives a SIGHUP signal. (#12673)
• Add a config options to allow for auto-tuning of caches. (#12701)
• Update MSC2716 implementation to process marker events from the current state to avoid markers being lost in timeline gaps for federated servers which would cause the imported history to be undiscovered. (#12718)
• Add a drop_federated_event callback to SpamChecker to disregard inbound federated events before they take up much processing power, in an emergency. (#12744)
• Implement MSC3818: Copy room type on upgrade. (#12786, #12792)
• Update to the check_event_for_spam module callback. Deprecate the current callback signature, replace it with a new signature that is both less ambiguous (replacing booleans with explicit allow/block) and more powerful (ability to return explicit error codes). (#12808)

Bugfixes

• Fix a bug introduced in Synapse 1.7.0 that would prevent events from being sent to clients if there's a retention policy in the room when the support for retention policies is disabled. (#12611)
• Fix a bug introduced in Synapse 1.57.0 where /messages would throw a 500 error when querying for a non-existent room. (#12683)
• Add a unique index to state_group_edges to prevent duplicates being accidentally introduced and the consequential impact to performance. (#12687)
• Fix a long-standing bug where an empty room would be created when a user with an insufficient power level tried to upgrade a room. (#12696)
• Fix a bug introduced in Synapse 1.30.0 where empty rooms could be automatically created if a monthly active users limit is set. (#12713)
• Fix push to dismiss notifications when read on another client. Contributed by @SpiritCroc @ Beeper. (#12721)
• Fix poor database performance when reading the cache invalidation stream for large servers with lots of workers. (#12747)
• Fix a long-standing bug where the user directory background process would fail to make forward progress if a user included a null codepoint in their display name or avatar. (#12762)
• Delete events from the federation_inbound_events_staging table when a room is purged through the admin API. (#12770)
• Give a meaningful error message when a client tries to create a room with an invalid alias localpart. (#12779)
• Fix a bug introduced in 1.43.0 where a file (providers.json) was never closed. Contributed by @arkamar. (#12794)
• Fix a long-standing bug where finished log contexts would be re-started when failing to contact remote homeservers. (#12803)
• Fix a bug, introduced in Synapse 1.21.0, that led to media thumbnails being unusable before the index has been added in the background. (#12823)

Updates to the Docker image

• Fix the docker file after a dependency update. (#12853)

Improved Documentation

• Fix a typo in the Media Admin API documentation. (#12715)
• Update the OpenID Connect example for Keycloak to be compatible with newer versions of Keycloak. Contributed by @nhh. (#12727)
• Fix typo in server listener documentation. (#12742)
• Link to the configuration manual from the welcome page of the documentation. (#12748)
• Fix typo in run_background_tasks_on option name in configuration manual documentation. (#12749)
• Add information regarding the rc_invites ratelimiting option to the configuration docs. (#12759)
• Add documentation for cancellation of request processing. (#12761)
• Recommend using docker to run tests against postgres. (#12765)
• Add missing user directory endpoint from the generic worker documentation. Contributed by @olmari. (#12773)
• Add additional info to documentation of config option cache_autotuning. (#12776)
• Update configuration manual documentation to document size-related suffixes. (#12777)
• Fix invalid YAML syntax in the example documentation for the url_preview_accept_language config option. (#12785)

Deprecations and Removals

• Require a body in POST requests to /rooms/{roomId}/receipt/{receiptType}/{eventId}, as required by the Matrix specification. This breaks compatibility with Element Android 1.2.0 and earlier: users of those clients will be unable to send read receipts. (#12709)

Internal Changes

• Improve event caching mechanism to avoid having multiple copies of an event in memory at a time. (#10533)
• Preparation for faster-room-join work: return subsets of room state which we already have, immediately. (#12498)
• Add @cancellable decorator, for use on endpoint methods that can be cancelled when clients disconnect. (#12586, #12588, #12630, #12694, #12698, #12699, #12700, #12705)
• Enable cancellation of GET /rooms/$room_id/members, GET /rooms/$room_id/state and GET /rooms/$room_id/state/$event_type/* requests. (#12708)
• Improve documentation of the synapse.push module. (#12676)
• Refactor functions to on PushRuleEvaluatorForEvent. (#12677)
• Preparation for database schema simplifications: stop writing to event_reference_hashes. (#12679)
• Remove code which updates unused database column application_services_state.last_txn. (#12680)
• Refactor EventContext class. (#12689)
• Remove an unneeded class in the push code. (#12691)
• Consolidate parsing of relation information from events. (#12693)
• Convert namespace class Codes into a string enum. (#12703)
• Optimize private read receipt filtering. (#12711)
• Drop the logging level of status messages for the URL preview cache expiry job from INFO to DEBUG. (#12720)
• Downgrade some OIDC errors to warnings in the logs, to reduce the noise of Sentry reports. (#12723)
• Update configs used by Complement to allow more invites/3PID validations during tests. (#12731)
• Tweak the mypy plugin so that @cached can accept on_invalidate=None. (#12769)
• Move methods that call add_push_rule to the PushRuleStore class. (#12772)
• Make handling of federation Authorization header (more) compliant with RFC7230. (#12774)
• Refactor resolve_state_groups_for_events to not pull out full state when no state resolution happens. (#12775)
• Do not keep going if there are 5 back-to-back background update failures. (#12781)
• Fix federation when using the demo scripts. (#12783)
• The hash_password script now fails when it is called without specifying a config file. Contributed by @jae1911. (#12789)
• Improve and fix type hints. (#12567, #12477, #12717, #12753, #12695, #12734, #12716, #12726, #12790, #12833)
• Update EventContext get_current_event_ids and get_prev_event_ids to accept state filters and update calls where possible. (#12791)
• Remove Caddy from the Synapse workers image used in Complement. (#12818)
• Add Complement's shared registration secret to the Complement worker image. This fixes tests that depend on it. (#12819)
• Support registering Application Services when running with workers under Complement. (#12826)
• Disable 'faster room join' Complement tests when testing against Synapse with workers. (#12842)