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Db txn set isolation level #11799

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merged 9 commits into from
Jan 25, 2022

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@Fizzadar Fizzadar commented Jan 21, 2022

Part of: #11567

Some things to figure out:

  • How should codepaths calling runInteraction specify the TXN level? They exist as constants within psycopg2 which may not be installed. One option is a mapping of str -> level in the postgres engine module.
  • Is None the right value to reset the TXN level back to the (synapse specific) default

Signed-off-by: Nick Barrett nick@beeper.com

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@Fizzadar Fizzadar marked this pull request as ready for review January 21, 2022 18:12
@Fizzadar Fizzadar requested a review from a team as a code owner January 21, 2022 18:12
@babolivier babolivier self-assigned this Jan 24, 2022
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Thanks a lot for looking into this!

Is None the right value to reset the TXN level back to the (synapse specific) default

I'd say it's a good enough sentinel value.

Your changes seem to be missing this case, though, causing attempt_to_set_isolation_level to never get called when the isolation level is None.

synapse/storage/database.py Outdated Show resolved Hide resolved
Co-authored-by: Brendan Abolivier <github@brendanabolivier.com>
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Thanks for the review @babolivier!

Your changes seem to be missing this case, though, causing attempt_to_set_isolation_level to never get called when the isolation level is None.

Is there anything to do in this case? None would mean no change from the default so no need to change the transaction level at all?

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Your changes seem to be missing this case, though, causing attempt_to_set_isolation_level to never get called when the isolation level is None.

Is there anything to do in this case? None would mean no change from the default so no need to change the transaction level at all?

Sorry, I misread your code 🤦 I thought the finally clause would set the isolation level to isolation_level, not None, hence my confusion. So actually it's all good from me. Ideally this would come with a unit test but I'm not sure how we'd do it, so let's not block on that.

Could you merge develop in, though, please? There's a fix to the mypy failure in there.

@babolivier babolivier merged commit b59d285 into matrix-org:develop Jan 25, 2022
@Fizzadar Fizzadar deleted the db-txn-set-isolation-level branch January 26, 2022 10:21
@@ -702,6 +702,7 @@ async def runInteraction(
func: Callable[..., R],
*args: Any,
db_autocommit: bool = False,
isolation_level: Optional[int] = None,
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looks like this parameter isn't being passed into runWithConnection.

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Oh huh indeed, looks like I've missed that :/

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I've opened #11847 to fix this.

babolivier added a commit that referenced this pull request Jan 27, 2022
babolivier added a commit that referenced this pull request Jan 27, 2022
babolivier added a commit to matrix-org/synapse-dinsic that referenced this pull request Feb 7, 2022
Synapse 1.52.0rc1 (2022-02-01)
==============================

Features
--------

- Remove account data (including client config, push rules and ignored users) upon user deactivation. ([\#11621](matrix-org/synapse#11621), [\#11788](matrix-org/synapse#11788), [\#11789](matrix-org/synapse#11789))
- Add an admin API to reset connection timeouts for remote server. ([\#11639](matrix-org/synapse#11639))
- Add an admin API to get a list of rooms that federate with a given remote homeserver. ([\#11658](matrix-org/synapse#11658))
- Add a config flag to inhibit M_USER_IN_USE during registration. ([\#11743](matrix-org/synapse#11743))
- Add a module callback to set username at registration. ([\#11790](matrix-org/synapse#11790))
- Allow configuring a maximum file size as well as a list of allowed content types for avatars. ([\#11846](matrix-org/synapse#11846))

Bugfixes
--------

- Include the bundled aggregations in the `/sync` response, per [MSC2675](matrix-org/matrix-spec-proposals#2675). ([\#11612](matrix-org/synapse#11612))
- Fix a long-standing bug when previewing Reddit URLs which do not contain an image. ([\#11767](matrix-org/synapse#11767))
- Fix a long-standing bug that media streams could cause long-lived connections when generating URL previews. ([\#11784](matrix-org/synapse#11784))
- Include a `prev_content` field in state events sent to Application Services. Contributed by @totallynotvaishnav. ([\#11798](matrix-org/synapse#11798))
- Fix a bug introduced in Synapse 0.33.3 causing requests to sometimes log strings such as `HTTPStatus.OK` instead of integer status codes. ([\#11827](matrix-org/synapse#11827))

Improved Documentation
----------------------

- Update pypi installation docs to indicate that we now support Python 3.10. ([\#11820](matrix-org/synapse#11820))
- Add missing steps to the contribution submission process in the documentation.  Contributed by @sequentialread. ([\#11821](matrix-org/synapse#11821))
- Remove not needed old table of contents in documentation. ([\#11860](matrix-org/synapse#11860))
- Consolidate the `access_token` information at the top of each relevant page in the Admin API documentation. ([\#11861](matrix-org/synapse#11861))

Deprecations and Removals
-------------------------

- Drop support for Python 3.6, which is EOL. ([\#11683](matrix-org/synapse#11683))
- Remove the `experimental_msc1849_support_enabled` flag as the features are now stable. ([\#11843](matrix-org/synapse#11843))

Internal Changes
----------------

- Preparation for database schema simplifications: add `state_key` and `rejection_reason` columns to `events` table. ([\#11792](matrix-org/synapse#11792))
- Add `FrozenEvent.get_state_key` and use it in a couple of places. ([\#11793](matrix-org/synapse#11793))
- Preparation for database schema simplifications: stop reading from `event_reference_hashes`. ([\#11794](matrix-org/synapse#11794))
- Drop unused table `public_room_list_stream`. ([\#11795](matrix-org/synapse#11795))
- Preparation for reducing Postgres serialization errors: allow setting transaction isolation level. Contributed by Nick @ Beeper. ([\#11799](matrix-org/synapse#11799), [\#11847](matrix-org/synapse#11847))
- Docker: skip the initial amd64-only build and go straight to multiarch. ([\#11810](matrix-org/synapse#11810))
- Run Complement on the Github Actions VM and not inside a Docker container. ([\#11811](matrix-org/synapse#11811))
- Log module names at startup. ([\#11813](matrix-org/synapse#11813))
- Improve type safety of bundled aggregations code. ([\#11815](matrix-org/synapse#11815))
- Correct a type annotation in the event validation logic. ([\#11817](matrix-org/synapse#11817), [\#11830](matrix-org/synapse#11830))
- Minor updates and documentation for database schema delta files. ([\#11823](matrix-org/synapse#11823))
- Workaround a type annotation problem in `prometheus_client` 0.13.0. ([\#11834](matrix-org/synapse#11834))
- Minor performance improvement in room state lookup. ([\#11836](matrix-org/synapse#11836))
- Fix some indentation inconsistencies in the sample config. ([\#11838](matrix-org/synapse#11838))
- Add type hints to `tests/rest/admin`. ([\#11851](matrix-org/synapse#11851))
babolivier added a commit to matrix-org/synapse-dinsic that referenced this pull request Feb 8, 2022
Synapse 1.52.0 (2022-02-08)
===========================

No significant changes since 1.52.0rc1.

During the making of this release, the developers of Twisted have released
[Twisted 22.1.0](https://github.com/twisted/twisted/releases/tag/twisted-22.1.0), which
fixes [a security issue](GHSA-92x2-jw7w-xvvx)
within Twisted. We do not believe Synapse to be vulnerable to any security problem caused
by this issue, though we advise server administrators to update their local version of
Twisted if they can.

Synapse 1.52.0rc1 (2022-02-01)
==============================

Features
--------

- Remove account data (including client config, push rules and ignored users) upon user deactivation. ([\#11621](matrix-org/synapse#11621), [\#11788](matrix-org/synapse#11788), [\#11789](matrix-org/synapse#11789))
- Add an admin API to reset connection timeouts for remote server. ([\#11639](matrix-org/synapse#11639))
- Add an admin API to get a list of rooms that federate with a given remote homeserver. ([\#11658](matrix-org/synapse#11658))
- Add a config flag to inhibit `M_USER_IN_USE` during registration. ([\#11743](matrix-org/synapse#11743))
- Add a module callback to set username at registration. ([\#11790](matrix-org/synapse#11790))
- Allow configuring a maximum file size as well as a list of allowed content types for avatars. ([\#11846](matrix-org/synapse#11846))

Bugfixes
--------

- Include the bundled aggregations in the `/sync` response, per [MSC2675](matrix-org/matrix-spec-proposals#2675). ([\#11612](matrix-org/synapse#11612))
- Fix a long-standing bug when previewing Reddit URLs which do not contain an image. ([\#11767](matrix-org/synapse#11767))
- Fix a long-standing bug that media streams could cause long-lived connections when generating URL previews. ([\#11784](matrix-org/synapse#11784))
- Include a `prev_content` field in state events sent to Application Services. Contributed by @totallynotvaishnav. ([\#11798](matrix-org/synapse#11798))
- Fix a bug introduced in Synapse 0.33.3 causing requests to sometimes log strings such as `HTTPStatus.OK` instead of integer status codes. ([\#11827](matrix-org/synapse#11827))

Improved Documentation
----------------------

- Update pypi installation docs to indicate that we now support Python 3.10. ([\#11820](matrix-org/synapse#11820))
- Add missing steps to the contribution submission process in the documentation.  Contributed by @sequentialread. ([\#11821](matrix-org/synapse#11821))
- Remove not needed old table of contents in documentation. ([\#11860](matrix-org/synapse#11860))
- Consolidate the `access_token` information at the top of each relevant page in the Admin API documentation. ([\#11861](matrix-org/synapse#11861))

Deprecations and Removals
-------------------------

- Drop support for Python 3.6, which is EOL. ([\#11683](matrix-org/synapse#11683))
- Remove the `experimental_msc1849_support_enabled` flag as the features are now stable. ([\#11843](matrix-org/synapse#11843))

Internal Changes
----------------

- Preparation for database schema simplifications: add `state_key` and `rejection_reason` columns to `events` table. ([\#11792](matrix-org/synapse#11792))
- Add `FrozenEvent.get_state_key` and use it in a couple of places. ([\#11793](matrix-org/synapse#11793))
- Preparation for database schema simplifications: stop reading from `event_reference_hashes`. ([\#11794](matrix-org/synapse#11794))
- Drop unused table `public_room_list_stream`. ([\#11795](matrix-org/synapse#11795))
- Preparation for reducing Postgres serialization errors: allow setting transaction isolation level. Contributed by Nick @ Beeper. ([\#11799](matrix-org/synapse#11799), [\#11847](matrix-org/synapse#11847))
- Docker: skip the initial amd64-only build and go straight to multiarch. ([\#11810](matrix-org/synapse#11810))
- Run Complement on the Github Actions VM and not inside a Docker container. ([\#11811](matrix-org/synapse#11811))
- Log module names at startup. ([\#11813](matrix-org/synapse#11813))
- Improve type safety of bundled aggregations code. ([\#11815](matrix-org/synapse#11815))
- Correct a type annotation in the event validation logic. ([\#11817](matrix-org/synapse#11817), [\#11830](matrix-org/synapse#11830))
- Minor updates and documentation for database schema delta files. ([\#11823](matrix-org/synapse#11823))
- Workaround a type annotation problem in `prometheus_client` 0.13.0. ([\#11834](matrix-org/synapse#11834))
- Minor performance improvement in room state lookup. ([\#11836](matrix-org/synapse#11836))
- Fix some indentation inconsistencies in the sample config. ([\#11838](matrix-org/synapse#11838))
- Add type hints to `tests/rest/admin`. ([\#11851](matrix-org/synapse#11851))
netbsd-srcmastr pushed a commit to NetBSD/pkgsrc that referenced this pull request Feb 25, 2022
Synapse 1.53.0 (2022-02-22)
===========================

No significant changes.


Synapse 1.53.0rc1 (2022-02-15)
==============================

Features
--------

- Add experimental support for sending to-device messages to application services, as specified by [MSC2409](matrix-org/matrix-spec-proposals#2409). ([\#11215](matrix-org/synapse#11215), [\#11966](matrix-org/synapse#11966))
- Remove account data (including client config, push rules and ignored users) upon user deactivation. ([\#11655](matrix-org/synapse#11655))
- Experimental support for [MSC3666](matrix-org/matrix-spec-proposals#3666): including bundled aggregations in server side search results. ([\#11837](matrix-org/synapse#11837))
- Enable cache time-based expiry by default. The `expiry_time` config flag has been superseded by `expire_caches` and `cache_entry_ttl`. ([\#11849](matrix-org/synapse#11849))
- Add a callback to allow modules to allow or forbid a 3PID (email address, phone number) from being associated to a local account. ([\#11854](matrix-org/synapse#11854))
- Stabilize support and remove unstable endpoints for [MSC3231](matrix-org/matrix-spec-proposals#3231). Clients must switch to the stable identifier and endpoint. See the [upgrade notes](https://matrix-org.github.io/synapse/develop/upgrade#stablisation-of-msc3231) for more information. ([\#11867](matrix-org/synapse#11867))
- Allow modules to retrieve the current instance's server name and worker name. ([\#11868](matrix-org/synapse#11868))
- Use a dedicated configurable rate limiter for 3PID invites. ([\#11892](matrix-org/synapse#11892))
- Support the stable API endpoint for [MSC3283](matrix-org/matrix-spec-proposals#3283): new settings in `/capabilities` endpoint. ([\#11933](matrix-org/synapse#11933), [\#11989](matrix-org/synapse#11989))
- Support the `dir` parameter on the `/relations` endpoint, per [MSC3715](matrix-org/matrix-spec-proposals#3715). ([\#11941](matrix-org/synapse#11941))
- Experimental implementation of [MSC3706](matrix-org/matrix-spec-proposals#3706): extensions to `/send_join` to support reduced response size. ([\#11967](matrix-org/synapse#11967))


Bugfixes
--------

- Fix [MSC2716](matrix-org/matrix-spec-proposals#2716) historical messages backfilling in random order on remote homeservers. ([\#11114](matrix-org/synapse#11114))
- Fix a bug introduced in Synapse 1.51.0 where incoming federation transactions containing at least one EDU would be dropped if debug logging was enabled for `synapse.8631_debug`. ([\#11890](matrix-org/synapse#11890))
- Fix a long-standing bug where some unknown endpoints would return HTML error pages instead of JSON `M_UNRECOGNIZED` errors. ([\#11930](matrix-org/synapse#11930))
- Implement an allow list of content types for which we will attempt to preview a URL. This prevents Synapse from making useless longer-lived connections to streaming media servers. ([\#11936](matrix-org/synapse#11936))
- Fix a long-standing bug where pagination tokens from `/sync` and `/messages` could not be provided to the `/relations` API. ([\#11952](matrix-org/synapse#11952))
- Require that modules register their callbacks using keyword arguments. ([\#11975](matrix-org/synapse#11975))
- Fix a long-standing bug where `M_WRONG_ROOM_KEYS_VERSION` errors would not include the specced `current_version` field. ([\#11988](matrix-org/synapse#11988))


Improved Documentation
----------------------

- Fix typo in User Admin API: unpind -> unbind. ([\#11859](matrix-org/synapse#11859))
- Document images returned by the User List Media Admin API can include those generated by URL previews. ([\#11862](matrix-org/synapse#11862))
- Remove outdated MSC1711 FAQ document. ([\#11907](matrix-org/synapse#11907))
- Correct the structured logging configuration example. Contributed by Brad Jones. ([\#11946](matrix-org/synapse#11946))
- Add information on the Synapse release cycle. ([\#11954](matrix-org/synapse#11954))
- Fix broken link in the README to the admin API for password reset. ([\#11955](matrix-org/synapse#11955))


Deprecations and Removals
-------------------------

- Drop support for `webclient` listeners and configuring `web_client_location` to a non-HTTP(S) URL. Deprecated configurations are a configuration error. ([\#11895](matrix-org/synapse#11895))
- Remove deprecated `user_may_create_room_with_invites` spam checker callback. See the [upgrade notes](https://matrix-org.github.io/synapse/latest/upgrade.html#removal-of-user_may_create_room_with_invites) for more information. ([\#11950](matrix-org/synapse#11950))
- No longer build `.deb` packages for Ubuntu 21.04 Hirsute Hippo, which has now EOLed. ([\#11961](matrix-org/synapse#11961))


Internal Changes
----------------

- Enhance user registration test helpers to make them more useful for tests involving application services and devices. ([\#11615](matrix-org/synapse#11615), [\#11616](matrix-org/synapse#11616))
- Improve performance when fetching bundled aggregations for multiple events. ([\#11660](matrix-org/synapse#11660), [\#11752](matrix-org/synapse#11752))
- Fix type errors introduced by new annotations in the Prometheus Client library. ([\#11832](matrix-org/synapse#11832))
- Add missing type hints to replication code. ([\#11856](matrix-org/synapse#11856), [\#11938](matrix-org/synapse#11938))
- Ensure that `opentracing` scopes are activated and closed at the right time. ([\#11869](matrix-org/synapse#11869))
- Improve opentracing for incoming federation requests. ([\#11870](matrix-org/synapse#11870))
- Improve internal docstrings in `synapse.util.caches`. ([\#11876](matrix-org/synapse#11876))
- Do not needlessly clear the `get_users_in_room` and `get_users_in_room_with_profiles` caches when any room state changes. ([\#11878](matrix-org/synapse#11878))
- Convert `ApplicationServiceTestCase` to use `simple_async_mock`. ([\#11880](matrix-org/synapse#11880))
- Remove experimental changes to the default push rules which were introduced in Synapse 1.19.0 but never enabled. ([\#11884](matrix-org/synapse#11884))
- Disable coverage calculation for olddeps build. ([\#11888](matrix-org/synapse#11888))
- Preparation to support sending device list updates to application services. ([\#11905](matrix-org/synapse#11905))
- Add a test that checks users receive their own device list updates down `/sync`. ([\#11909](matrix-org/synapse#11909))
- Run Complement tests sequentially. ([\#11910](matrix-org/synapse#11910))
- Various refactors to the application service notifier code. ([\#11911](matrix-org/synapse#11911), [\#11912](matrix-org/synapse#11912))
- Tests: replace mocked `Authenticator` with the real thing. ([\#11913](matrix-org/synapse#11913))
- Various refactors to the typing notifications code. ([\#11914](matrix-org/synapse#11914))
- Use the proper type for the `Content-Length` header in the `UploadResource`. ([\#11927](matrix-org/synapse#11927))
- Remove an unnecessary ignoring of type hints due to fixes in upstream packages. ([\#11939](matrix-org/synapse#11939))
- Add missing type hints. ([\#11953](matrix-org/synapse#11953))
- Fix an import cycle in `synapse.event_auth`. ([\#11965](matrix-org/synapse#11965))
- Unpin `frozendict` but exclude the known bad version 2.1.2. ([\#11969](matrix-org/synapse#11969))
- Prepare for rename of default Complement branch. ([\#11971](matrix-org/synapse#11971))
- Fetch Synapse's version using a helper from `matrix-common`. ([\#11979](matrix-org/synapse#11979))


Synapse 1.52.0 (2022-02-08)
===========================

No significant changes since 1.52.0rc1.

Note that [Twisted 22.1.0](https://github.com/twisted/twisted/releases/tag/twisted-22.1.0)
has recently been released, which fixes a [security issue](GHSA-92x2-jw7w-xvvx)
within the Twisted library. We do not believe Synapse is affected by this vulnerability,
though we advise server administrators who installed Synapse via pip to upgrade Twisted
with `pip install --upgrade Twisted` as a matter of good practice. The Docker image
`matrixdotorg/synapse` and the Debian packages from `packages.matrix.org` are using the
updated library.


Synapse 1.52.0rc1 (2022-02-01)
==============================

Features
--------

- Remove account data (including client config, push rules and ignored users) upon user deactivation. ([\#11621](matrix-org/synapse#11621), [\#11788](matrix-org/synapse#11788), [\#11789](matrix-org/synapse#11789))
- Add an admin API to reset connection timeouts for remote server. ([\#11639](matrix-org/synapse#11639))
- Add an admin API to get a list of rooms that federate with a given remote homeserver. ([\#11658](matrix-org/synapse#11658))
- Add a config flag to inhibit `M_USER_IN_USE` during registration. ([\#11743](matrix-org/synapse#11743))
- Add a module callback to set username at registration. ([\#11790](matrix-org/synapse#11790))
- Allow configuring a maximum file size as well as a list of allowed content types for avatars. ([\#11846](matrix-org/synapse#11846))


Bugfixes
--------

- Include the bundled aggregations in the `/sync` response, per [MSC2675](matrix-org/matrix-spec-proposals#2675). ([\#11612](matrix-org/synapse#11612))
- Fix a long-standing bug when previewing Reddit URLs which do not contain an image. ([\#11767](matrix-org/synapse#11767))
- Fix a long-standing bug that media streams could cause long-lived connections when generating URL previews. ([\#11784](matrix-org/synapse#11784))
- Include a `prev_content` field in state events sent to Application Services. Contributed by @totallynotvaishnav. ([\#11798](matrix-org/synapse#11798))
- Fix a bug introduced in Synapse 0.33.3 causing requests to sometimes log strings such as `HTTPStatus.OK` instead of integer status codes. ([\#11827](matrix-org/synapse#11827))


Improved Documentation
----------------------

- Update pypi installation docs to indicate that we now support Python 3.10. ([\#11820](matrix-org/synapse#11820))
- Add missing steps to the contribution submission process in the documentation.  Contributed by @sequentialread. ([\#11821](matrix-org/synapse#11821))
- Remove not needed old table of contents in documentation. ([\#11860](matrix-org/synapse#11860))
- Consolidate the `access_token` information at the top of each relevant page in the Admin API documentation. ([\#11861](matrix-org/synapse#11861))


Deprecations and Removals
-------------------------

- Drop support for Python 3.6, which is EOL. ([\#11683](matrix-org/synapse#11683))
- Remove the `experimental_msc1849_support_enabled` flag as the features are now stable. ([\#11843](matrix-org/synapse#11843))


Internal Changes
----------------

- Preparation for database schema simplifications: add `state_key` and `rejection_reason` columns to `events` table. ([\#11792](matrix-org/synapse#11792))
- Add `FrozenEvent.get_state_key` and use it in a couple of places. ([\#11793](matrix-org/synapse#11793))
- Preparation for database schema simplifications: stop reading from `event_reference_hashes`. ([\#11794](matrix-org/synapse#11794))
- Drop unused table `public_room_list_stream`. ([\#11795](matrix-org/synapse#11795))
- Preparation for reducing Postgres serialization errors: allow setting transaction isolation level. Contributed by Nick @ Beeper. ([\#11799](matrix-org/synapse#11799), [\#11847](matrix-org/synapse#11847))
- Docker: skip the initial amd64-only build and go straight to multiarch. ([\#11810](matrix-org/synapse#11810))
- Run Complement on the Github Actions VM and not inside a Docker container. ([\#11811](matrix-org/synapse#11811))
- Log module names at startup. ([\#11813](matrix-org/synapse#11813))
- Improve type safety of bundled aggregations code. ([\#11815](matrix-org/synapse#11815))
- Correct a type annotation in the event validation logic. ([\#11817](matrix-org/synapse#11817), [\#11830](matrix-org/synapse#11830))
- Minor updates and documentation for database schema delta files. ([\#11823](matrix-org/synapse#11823))
- Workaround a type annotation problem in `prometheus_client` 0.13.0. ([\#11834](matrix-org/synapse#11834))
- Minor performance improvement in room state lookup. ([\#11836](matrix-org/synapse#11836))
- Fix some indentation inconsistencies in the sample config. ([\#11838](matrix-org/synapse#11838))
- Add type hints to `tests/rest/admin`. ([\#11851](matrix-org/synapse#11851))
Fizzadar pushed a commit to Fizzadar/synapse that referenced this pull request Mar 7, 2022
Synapse 1.52.0 (2022-02-08)
===========================

No significant changes since 1.52.0rc1.

During the making of this release, the developers of Twisted have released
[Twisted 22.1.0](https://github.com/twisted/twisted/releases/tag/twisted-22.1.0), which
fixes [a security issue](GHSA-92x2-jw7w-xvvx)
within Twisted. We do not believe Synapse to be vulnerable to any security problem caused
by this issue, though we advise server administrators to update their local version of
Twisted if they can.

Synapse 1.52.0rc1 (2022-02-01)
==============================

Features
--------

- Remove account data (including client config, push rules and ignored users) upon user deactivation. ([\matrix-org#11621](matrix-org#11621), [\matrix-org#11788](matrix-org#11788), [\matrix-org#11789](matrix-org#11789))
- Add an admin API to reset connection timeouts for remote server. ([\matrix-org#11639](matrix-org#11639))
- Add an admin API to get a list of rooms that federate with a given remote homeserver. ([\matrix-org#11658](matrix-org#11658))
- Add a config flag to inhibit `M_USER_IN_USE` during registration. ([\matrix-org#11743](matrix-org#11743))
- Add a module callback to set username at registration. ([\matrix-org#11790](matrix-org#11790))
- Allow configuring a maximum file size as well as a list of allowed content types for avatars. ([\matrix-org#11846](matrix-org#11846))

Bugfixes
--------

- Include the bundled aggregations in the `/sync` response, per [MSC2675](matrix-org/matrix-spec-proposals#2675). ([\matrix-org#11612](matrix-org#11612))
- Fix a long-standing bug when previewing Reddit URLs which do not contain an image. ([\matrix-org#11767](matrix-org#11767))
- Fix a long-standing bug that media streams could cause long-lived connections when generating URL previews. ([\matrix-org#11784](matrix-org#11784))
- Include a `prev_content` field in state events sent to Application Services. Contributed by @totallynotvaishnav. ([\matrix-org#11798](matrix-org#11798))
- Fix a bug introduced in Synapse 0.33.3 causing requests to sometimes log strings such as `HTTPStatus.OK` instead of integer status codes. ([\matrix-org#11827](matrix-org#11827))

Improved Documentation
----------------------

- Update pypi installation docs to indicate that we now support Python 3.10. ([\matrix-org#11820](matrix-org#11820))
- Add missing steps to the contribution submission process in the documentation.  Contributed by @sequentialread. ([\matrix-org#11821](matrix-org#11821))
- Remove not needed old table of contents in documentation. ([\matrix-org#11860](matrix-org#11860))
- Consolidate the `access_token` information at the top of each relevant page in the Admin API documentation. ([\matrix-org#11861](matrix-org#11861))

Deprecations and Removals
-------------------------

- Drop support for Python 3.6, which is EOL. ([\matrix-org#11683](matrix-org#11683))
- Remove the `experimental_msc1849_support_enabled` flag as the features are now stable. ([\matrix-org#11843](matrix-org#11843))

Internal Changes
----------------

- Preparation for database schema simplifications: add `state_key` and `rejection_reason` columns to `events` table. ([\matrix-org#11792](matrix-org#11792))
- Add `FrozenEvent.get_state_key` and use it in a couple of places. ([\matrix-org#11793](matrix-org#11793))
- Preparation for database schema simplifications: stop reading from `event_reference_hashes`. ([\matrix-org#11794](matrix-org#11794))
- Drop unused table `public_room_list_stream`. ([\matrix-org#11795](matrix-org#11795))
- Preparation for reducing Postgres serialization errors: allow setting transaction isolation level. Contributed by Nick @ Beeper. ([\matrix-org#11799](matrix-org#11799), [\matrix-org#11847](matrix-org#11847))
- Docker: skip the initial amd64-only build and go straight to multiarch. ([\matrix-org#11810](matrix-org#11810))
- Run Complement on the Github Actions VM and not inside a Docker container. ([\matrix-org#11811](matrix-org#11811))
- Log module names at startup. ([\matrix-org#11813](matrix-org#11813))
- Improve type safety of bundled aggregations code. ([\matrix-org#11815](matrix-org#11815))
- Correct a type annotation in the event validation logic. ([\matrix-org#11817](matrix-org#11817), [\matrix-org#11830](matrix-org#11830))
- Minor updates and documentation for database schema delta files. ([\matrix-org#11823](matrix-org#11823))
- Workaround a type annotation problem in `prometheus_client` 0.13.0. ([\matrix-org#11834](matrix-org#11834))
- Minor performance improvement in room state lookup. ([\matrix-org#11836](matrix-org#11836))
- Fix some indentation inconsistencies in the sample config. ([\matrix-org#11838](matrix-org#11838))
- Add type hints to `tests/rest/admin`. ([\matrix-org#11851](matrix-org#11851))
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3 participants