Synapse 1.51.0 (2022-01-25)

No significant changes since 1.51.0rc2.

Synapse 1.51.0 deprecates webclient listeners and non-HTTP(S) web_client_locations. Support for these will be removed in Synapse 1.53.0, at which point Synapse will not be capable of directly serving a web client for Matrix. See the upgrade notes.

Synapse 1.51.0rc2 (2022-01-24)

Bugfixes

• Fix a bug introduced in Synapse 1.40.0 that caused Synapse to fail to process incoming federation traffic after handling a large amount of events in a v1 room. (#11806)

Synapse 1.51.0rc1 (2022-01-21)

Features

• Add track_puppeted_user_ips config flag to record client IP addresses against puppeted users, and include the puppeted users in monthly active user counts. (#11561, #11749, #11757)
• Include whether the requesting user has participated in a thread when generating a summary for MSC3440. (#11577)
• Return an M_FORBIDDEN error code instead of M_UNKNOWN when a spam checker module prevents a user from creating a room. (#11672)
• Add a flag to the synapse_review_recent_signups script to ignore and filter appservice users. (#11675, #11770)

Bugfixes

• Fix a long-standing issue which could cause Synapse to incorrectly accept data in the unsigned field of events
  received over federation. (#11530)
• Fix a long-standing bug where Synapse wouldn't cache a response indicating that a remote user has no devices. (#11587)
• Fix an error that occurs whilst trying to get the federation status of a destination server that was working normally. This admin API was newly introduced in Synapse v1.49.0. (#11593)
• Fix bundled aggregations not being included in the /sync response, per MSC2675. (#11612, #11659, #11791)
• Fix the /_matrix/client/v1/room/{roomId}/hierarchy endpoint returning incorrect fields which have been present since Synapse 1.49.0. (#11667)
• Fix preview of some GIF URLs (like tenor.com). Contributed by Philippe Daouadi. (#11669)
• Fix a bug where only the first 50 rooms from a space were returned from the /hierarchy API. This has existed since the introduction of the API in Synapse v1.41.0. (#11695)
• Fix a bug introduced in Synapse v1.18.0 where password reset and address validation emails would not be sent if their subject was configured to use the 'app' template variable. Contributed by @br4nnigan. (#11710, #11745)
• Make the 'List Rooms' Admin API sort stable. Contributed by Daniël Sonck. (#11737)
• Fix a long-standing bug where space hierarchy over federation would only work correctly some of the time. (#11775)
• Fix a bug introduced in Synapse v1.46.0 that prevented on_logged_out module callbacks from being correctly awaited by Synapse. (#11786)

Improved Documentation

• Warn against using a Let's Encrypt certificate for TLS/DTLS TURN server client connections, and suggest using ZeroSSL certificate instead. This works around client-side connectivity errors caused by WebRTC libraries that reject Let's Encrypt certificates. Contibuted by @AndrewFerr. (#11686)
• Document the new SYNAPSE_TEST_PERSIST_SQLITE_DB environment variable in the contributing guide. (#11715)
• Document that the minimum supported PostgreSQL version is now 10. (#11725)
• Fix typo in demo docs: differnt. (#11735)
• Update room spec URL in config files. (#11739)
• Mention python3-venv and libpq-dev dependencies in the contribution guide. (#11740)
• Update documentation for configuring login with Facebook. (#11755)
• Update installation instructions to note that Python 3.6 is no longer supported. (#11781)

Deprecations and Removals

• Remove the unstable /send_relation endpoint. (#11682)
• Remove python_twisted_reactor_pending_calls Prometheus metric. (#11724)
• Remove the password_hash field from the response dictionaries of the Users Admin API. (#11576)
• Deprecate support for webclient listeners and non-HTTP(S) web_client_location configuration. (#11774, #11783)

Internal Changes

• Run pyupgrade --py37-plus --keep-percent-format on Synapse. (#11685)
• Use buildkit's cache feature to speed up docker builds. (#11691)
• Use auto_attribs and native type hints for attrs classes. (#11692, #11768)
• Remove debug logging for #4422, which has been closed since Synapse 0.99. (#11693)
• Remove fallback code for Python 2. (#11699)
• Add a test for an edge case in the /sync logic. (#11701)
• Add the option to write SQLite test dbs to disk when running tests. (#11702)
• Improve Complement test output for Gitub Actions. (#11707)
• Fix docstring on add_account_data_for_user. (#11716)
• Complement environment variable name change and update .gitignore. (#11718)
• Simplify calculation of Prometheus metrics for garbage collection. (#11723)
• Improve accuracy of python_twisted_reactor_tick_time Prometheus metric. (#11724, #11771)
• Minor efficiency improvements when inserting many values into the database. (#11742)
• Invite PR authors to give themselves credit in the changelog. (#11744)
• Add optional debugging to investigate issue 8631. (#11760)
• Remove log_function utility function and its uses. (#11761)
• Add a unit test that checks both client and webclient resources will function when simultaneously enabled. (#11765)
• Allow overriding complement commit using COMPLEMENT_REF. (#11766)
• Add some comments and type annotations for _update_outliers_txn. (#11776)