Improve event caching code #10119

erikjohnston · 2021-06-03T15:29:49Z

This PR mainly does two things:

Ensure we only load an event from the DB once when the same event is requested multiple times at once.
~~Ensure that there is only one copy of any given event in memory at a time by using weak references.~~ (split out into Track in memory events using weakrefs #10533)

richvdh

looks like it should be a significant improvement.

I feel a bit like there are two PRs' worth of changes here: one to dedupe concurrent lookups, and one to use the weakref magic. ymmv though.

richvdh · 2021-08-02T16:51:41Z

synapse/events/__init__.py

@@ -111,6 +111,10 @@ def __init__(self, internal_metadata_dict: JsonDict):
        # in the DAG)
        self.outlier = False

+        # Whether this event has a valid redaction event pointing at it (i.e.
+        # whether it should be redacted before giving to clients).
+        self.redacted_by: Optional[str] = None


I'm super dubious about stuffing more things in here that don't form part of the internal_metadata column in the database.

Should we start a new attrs class for things like this, stream_ordering and outlier? (it also looks like before, after, order might fall into the same category).

also: it seems confusing to have both a redacted_by and a redacted property.

This code will be split out into its own PR.

synapse/storage/databases/main/events_worker.py

richvdh · 2021-08-02T17:24:26Z

synapse/storage/databases/main/events_worker.py

+                    redacted_event.unsigned[
+                        "redacted_by"
+                    ] = event.internal_metadata.redacted_by


do we not need redacted_because here?

This code will be split out into its own PR.

richvdh · 2021-08-02T17:26:13Z

synapse/storage/databases/main/events_worker.py

+                redacted_event = None
+                if event.internal_metadata.redacted_by is not None:
+                    # The event has been redacted, so we generate a redacted
+                    # version.
+                    redacted_event = prune_event(event)
+                    redacted_event.unsigned[
+                        "redacted_by"
+                    ] = event.internal_metadata.redacted_by
+
+                cache_entry = _EventCacheEntry(
+                    event=event,
+                    redacted_event=redacted_event,
+                )
+                event_map[event_id] = cache_entry

-            event_map[event_id] = ret
+                # We add the entry back into the cache as we want to keep
+                # recently queried events in the cache.
+                self._get_event_cache.set((event_id,), cache_entry)


could we refactor the similar code in _get_events_from_db/_maybe_redact_event_row so that we can reuse some common code rather than have two similar but slightly different impls?

For example: have _maybe_redact_event_row just return a boolean rather than the redaction; have _get_events_from_db poke internal_metadata.redacted_by based on that boolean; then move these lines here out to a build_cache_entry which can be called by _get_events_from_db.

This code will be split out into its own PR.

This reverts commit 5afe3d2.

…_cache

erikjohnston · 2021-08-03T09:05:16Z

I feel a bit like there are two PRs' worth of changes here: one to dedupe concurrent lookups, and one to use the weakref magic. ymmv though.

Err, yes indeed. I have done so.

richvdh

lgtm

richvdh · 2021-08-03T10:12:48Z

synapse/storage/databases/main/events_worker.py

+                # Ensure that we mark these events as no longer being fetched.
+                for event_id in missing_events_ids:
+                    self._current_event_fetches.pop(event_id, None)


I wonder if doing this after fetching_deferred.errback could cause races. I can't really think how it could, though.

I think the only thing that can happen is that another request waits on the deferred after its already been resolved, which shouldn't be an issue as awaiting on the deferred will just return immediately?

synapse/storage/databases/main/events_worker.py

changelog.d/10119.misc

Co-authored-by: Richard van der Hoff <[email protected]>

@Bubu

Synapse 1.41.0rc1 (2021-08-18) ============================== Features -------- - Add `get_userinfo_by_id` method to ModuleApi. ([\#9581](#9581)) - Initial local support for [MSC3266](#10394), Room Summary over the unstable `/rooms/{roomIdOrAlias}/summary` API. ([\#10394](#10394)) - Experimental support for [MSC3288](matrix-org/matrix-spec-proposals#3288), sending `room_type` to the identity server for 3pid invites over the `/store-invite` API. ([\#10435](#10435)) - Add support for sending federation requests through a proxy. Contributed by @Bubu and @dklimpel. ([\#10475](#10475)) - Add support for "marker" events which makes historical events discoverable for servers that already have all of the scrollback history (part of [MSC2716](matrix-org/matrix-spec-proposals#2716)). ([\#10498](#10498)) - Add a configuration setting for the time a `/sync` response is cached for. ([\#10513](#10513)) - The default logging handler for new installations is now `PeriodicallyFlushingMemoryHandler`, a buffered logging handler which periodically flushes itself. ([\#10518](#10518)) - Add support for new redaction rules for historical events specified in [MSC2716](matrix-org/matrix-spec-proposals#2716). ([\#10538](#10538)) - Add a setting to disable TLS when sending email. ([\#10546](#10546)) - Add pagination to the spaces summary based on updates to [MSC2946](matrix-org/matrix-spec-proposals#2946). ([\#10549](#10549), [\#10560](#10560), [\#10569](#10569), [\#10574](#10574), [\#10575](#10575), [\#10579](#10579), [\#10583](#10583)) - Admin API to delete several media for a specific user. Contributed by @dklimpel. ([\#10558](#10558), [\#10628](#10628)) - Add support for routing `/createRoom` to workers. ([\#10564](#10564)) - Update the Synapse Grafana dashboard. ([\#10570](#10570)) - Add an admin API (`GET /_synapse/admin/username_available`) to check if a username is available (regardless of registration settings). ([\#10578](#10578)) - Allow editing a user's `external_ids` via the "Edit User" admin API. Contributed by @dklimpel. ([\#10598](#10598)) - The Synapse manhole no longer needs coroutines to be wrapped in `defer.ensureDeferred`. ([\#10602](#10602)) - Add option to allow modules to run periodic tasks on all instances, rather than just the one configured to run background tasks. ([\#10638](#10638)) Bugfixes -------- - Add some clarification to the sample config file. Contributed by @Kentokamoto. ([\#10129](#10129)) - Fix a long-standing bug where protocols which are not implemented by any appservices were incorrectly returned via `GET /_matrix/client/r0/thirdparty/protocols`. ([\#10532](#10532)) - Fix exceptions in logs when failing to get remote room list. ([\#10541](#10541)) - Fix longstanding bug which caused the user "status" to be reset when the user went offline. Contributed by @dklimpel. ([\#10550](#10550)) - Allow public rooms to be previewed in the spaces summary APIs from [MSC2946](matrix-org/matrix-spec-proposals#2946). ([\#10580](#10580)) - Fix a bug introduced in v1.37.1 where an error could occur in the asynchronous processing of PDUs when the queue was empty. ([\#10592](#10592)) - Fix errors on /sync when read receipt data is a string. Only affects homeservers with the experimental flag for [MSC2285](matrix-org/matrix-spec-proposals#2285) enabled. Contributed by @SimonBrandner. ([\#10606](#10606)) - Additional validation for the spaces summary API to avoid errors like `ValueError: Stop argument for islice() must be None or an integer`. The missing validation has existed since v1.31.0. ([\#10611](#10611)) - Revert behaviour introduced in v1.38.0 that strips `org.matrix.msc2732.device_unused_fallback_key_types` from `/sync` when its value is empty. This field should instead always be present according to [MSC2732](https://github.com/matrix-org/matrix-doc/blob/master/proposals/2732-olm-fallback-keys.md). ([\#10623](#10623)) Improved Documentation ---------------------- - Add documentation for configuration a forward proxy. ([\#10443](#10443)) - Updated the reverse proxy documentation to highlight the homserver configuration that is needed to make Synapse aware that is is intentionally reverse proxied. ([\#10551](#10551)) - Update CONTRIBUTING.md to fix index links and the instructions for SyTest in docker. ([\#10599](#10599)) Deprecations and Removals ------------------------- - No longer build `.deb` packages for Ubuntu 20.10 LTS Groovy Gorilla, which has now EOLed. ([\#10588](#10588)) - The `template_dir` configuration settings in the `sso`, `account_validity` and `email` sections of the configuration file are now deprecated in favour of the global `templates.custom_template_directory` setting. See the [upgrade notes](https://matrix-org.github.io/synapse/latest/upgrade.html) for more information. ([\#10596](#10596)) Internal Changes ---------------- - Improve event caching mechanism to avoid having multiple copies of an event in memory at a time. ([\#10119](#10119)) - Reduce errors in PostgreSQL logs due to concurrent serialization errors. ([\#10504](#10504)) - Include room ID in ignored EDU log messages. Contributed by @ilmari. ([\#10507](#10507)) - Add pagination to the spaces summary based on updates to [MSC2946](matrix-org/matrix-spec-proposals#2946). ([\#10527](#10527), [\#10530](#10530)) - Fix CI to not break when run against branches rather than pull requests. ([\#10529](#10529)) - Mark all events stemming from the [MSC2716](matrix-org/matrix-spec-proposals#2716) `/batch_send` endpoint as historical. ([\#10537](#10537)) - Clean up some of the federation event authentication code for clarity. ([\#10539](#10539), [\#10591](#10591)) - Convert `Transaction` and `Edu` objects to attrs. ([\#10542](#10542)) - Update `/batch_send` endpoint to only return `state_events` created by the `state_events_from_before` passed in. ([\#10552](#10552)) - Update contributing.md to warn against rebasing an open PR. ([\#10563](#10563)) - Remove the unused public rooms replication stream. ([\#10565](#10565)) - Clarify error message when failing to join a restricted room. ([\#10572](#10572)) - Remove references to BuildKite in favour of GitHub Actions. ([\#10573](#10573)) - Move `/batch_send` endpoint defined by [MSC2716](matrix-org/matrix-spec-proposals#2716) to the `/v2_alpha` directory. ([\#10576](#10576)) - Allow multiple custom directories in `read_templates`. ([\#10587](#10587)) - Re-organize the `synapse.federation.transport.server` module to create smaller files. ([\#10590](#10590)) - Flatten the `synapse.rest.client` package by moving the contents of `v1` and `v2_alpha` into the parent. ([\#10600](#10600)) - Build Debian packages for Debian 12 (Bookworm). ([\#10612](#10612)) - Fix up a couple of links to the database schema documentation. ([\#10620](#10620)) - Fix a broken link to the upgrade notes. ([\#10631](#10631))

@Bubu

Synapse 1.41.0 (2021-08-24) =========================== This release adds support for Debian 12 (Bookworm), but **removes support for Ubuntu 20.10 (Groovy Gorilla)**, which reached End of Life last month. Note that when using workers the `/_synapse/admin/v1/users/{userId}/media` must now be handled by media workers. See the [upgrade notes](https://matrix-org.github.io/synapse/latest/upgrade.html) for more information. Features -------- - Enable room capabilities ([MSC3244](matrix-org/matrix-spec-proposals#3244)) by default and set room version 8 as the preferred room version when creating restricted rooms. ([\matrix-org#10571](matrix-org#10571)) Synapse 1.41.0rc1 (2021-08-18) ============================== Features -------- - Add `get_userinfo_by_id` method to ModuleApi. ([\matrix-org#9581](matrix-org#9581)) - Initial local support for [MSC3266](matrix-org#10394), Room Summary over the unstable `/rooms/{roomIdOrAlias}/summary` API. ([\matrix-org#10394](matrix-org#10394)) - Experimental support for [MSC3288](matrix-org/matrix-spec-proposals#3288), sending `room_type` to the identity server for 3pid invites over the `/store-invite` API. ([\matrix-org#10435](matrix-org#10435)) - Add support for sending federation requests through a proxy. Contributed by @Bubu and @dklimpel. See the [upgrade notes](https://matrix-org.github.io/synapse/latest/upgrade.html) for more information. ([\matrix-org#10596](matrix-org#10596)). ([\matrix-org#10475](matrix-org#10475)) - Add support for "marker" events which makes historical events discoverable for servers that already have all of the scrollback history (part of [MSC2716](matrix-org/matrix-spec-proposals#2716)). ([\matrix-org#10498](matrix-org#10498)) - Add a configuration setting for the time a `/sync` response is cached for. ([\matrix-org#10513](matrix-org#10513)) - The default logging handler for new installations is now `PeriodicallyFlushingMemoryHandler`, a buffered logging handler which periodically flushes itself. ([\matrix-org#10518](matrix-org#10518)) - Add support for new redaction rules for historical events specified in [MSC2716](matrix-org/matrix-spec-proposals#2716). ([\matrix-org#10538](matrix-org#10538)) - Add a setting to disable TLS when sending email. ([\matrix-org#10546](matrix-org#10546)) - Add pagination to the spaces summary based on updates to [MSC2946](matrix-org/matrix-spec-proposals#2946). ([\matrix-org#10549](matrix-org#10549), [\matrix-org#10560](matrix-org#10560), [\matrix-org#10569](matrix-org#10569), [\matrix-org#10574](matrix-org#10574), [\matrix-org#10575](matrix-org#10575), [\matrix-org#10579](matrix-org#10579), [\matrix-org#10583](matrix-org#10583)) - Admin API to delete several media for a specific user. Contributed by @dklimpel. ([\matrix-org#10558](matrix-org#10558), [\matrix-org#10628](matrix-org#10628)) - Add support for routing `/createRoom` to workers. ([\matrix-org#10564](matrix-org#10564)) - Update the Synapse Grafana dashboard. ([\matrix-org#10570](matrix-org#10570)) - Add an admin API (`GET /_synapse/admin/username_available`) to check if a username is available (regardless of registration settings). ([\matrix-org#10578](matrix-org#10578)) - Allow editing a user's `external_ids` via the "Edit User" admin API. Contributed by @dklimpel. ([\matrix-org#10598](matrix-org#10598)) - The Synapse manhole no longer needs coroutines to be wrapped in `defer.ensureDeferred`. ([\matrix-org#10602](matrix-org#10602)) - Add option to allow modules to run periodic tasks on all instances, rather than just the one configured to run background tasks. ([\matrix-org#10638](matrix-org#10638)) Bugfixes -------- - Add some clarification to the sample config file. Contributed by @Kentokamoto. ([\matrix-org#10129](matrix-org#10129)) - Fix a long-standing bug where protocols which are not implemented by any appservices were incorrectly returned via `GET /_matrix/client/r0/thirdparty/protocols`. ([\matrix-org#10532](matrix-org#10532)) - Fix exceptions in logs when failing to get remote room list. ([\matrix-org#10541](matrix-org#10541)) - Fix longstanding bug which caused the user's presence "status message" to be reset when the user went offline. Contributed by @dklimpel. ([\matrix-org#10550](matrix-org#10550)) - Allow public rooms to be previewed in the spaces summary APIs from [MSC2946](matrix-org/matrix-spec-proposals#2946). ([\matrix-org#10580](matrix-org#10580)) - Fix a bug introduced in v1.37.1 where an error could occur in the asynchronous processing of PDUs when the queue was empty. ([\matrix-org#10592](matrix-org#10592)) - Fix errors on /sync when read receipt data is a string. Only affects homeservers with the experimental flag for [MSC2285](matrix-org/matrix-spec-proposals#2285) enabled. Contributed by @SimonBrandner. ([\matrix-org#10606](matrix-org#10606)) - Additional validation for the spaces summary API to avoid errors like `ValueError: Stop argument for islice() must be None or an integer`. The missing validation has existed since v1.31.0. ([\matrix-org#10611](matrix-org#10611)) - Revert behaviour introduced in v1.38.0 that strips `org.matrix.msc2732.device_unused_fallback_key_types` from `/sync` when its value is empty. This field should instead always be present according to [MSC2732](https://github.com/matrix-org/matrix-doc/blob/master/proposals/2732-olm-fallback-keys.md). ([\matrix-org#10623](matrix-org#10623)) Improved Documentation ---------------------- - Add documentation for configuring a forward proxy. ([\matrix-org#10443](matrix-org#10443)) - Updated the reverse proxy documentation to highlight the homserver configuration that is needed to make Synapse aware that is is intentionally reverse proxied. ([\matrix-org#10551](matrix-org#10551)) - Update CONTRIBUTING.md to fix index links and the instructions for SyTest in docker. ([\matrix-org#10599](matrix-org#10599)) Deprecations and Removals ------------------------- - No longer build `.deb` packages for Ubuntu 20.10 Groovy Gorilla, which has now EOLed. ([\matrix-org#10588](matrix-org#10588)) - The `template_dir` configuration settings in the `sso`, `account_validity` and `email` sections of the configuration file are now deprecated in favour of the global `templates.custom_template_directory` setting. See the [upgrade notes](https://matrix-org.github.io/synapse/latest/upgrade.html) for more information. ([\matrix-org#10596](matrix-org#10596)) Internal Changes ---------------- - Improve event caching mechanism to avoid having multiple copies of an event in memory at a time. ([\matrix-org#10119](matrix-org#10119)) - Reduce errors in PostgreSQL logs due to concurrent serialization errors. ([\matrix-org#10504](matrix-org#10504)) - Include room ID in ignored EDU log messages. Contributed by @ilmari. ([\matrix-org#10507](matrix-org#10507)) - Add pagination to the spaces summary based on updates to [MSC2946](matrix-org/matrix-spec-proposals#2946). ([\matrix-org#10527](matrix-org#10527), [\matrix-org#10530](matrix-org#10530)) - Fix CI to not break when run against branches rather than pull requests. ([\matrix-org#10529](matrix-org#10529)) - Mark all events stemming from the [MSC2716](matrix-org/matrix-spec-proposals#2716) `/batch_send` endpoint as historical. ([\matrix-org#10537](matrix-org#10537)) - Clean up some of the federation event authentication code for clarity. ([\matrix-org#10539](matrix-org#10539), [\matrix-org#10591](matrix-org#10591)) - Convert `Transaction` and `Edu` objects to attrs. ([\matrix-org#10542](matrix-org#10542)) - Update `/batch_send` endpoint to only return `state_events` created by the `state_events_from_before` passed in. ([\matrix-org#10552](matrix-org#10552)) - Update contributing.md to warn against rebasing an open PR. ([\matrix-org#10563](matrix-org#10563)) - Remove the unused public rooms replication stream. ([\matrix-org#10565](matrix-org#10565)) - Clarify error message when failing to join a restricted room. ([\matrix-org#10572](matrix-org#10572)) - Remove references to BuildKite in favour of GitHub Actions. ([\matrix-org#10573](matrix-org#10573)) - Move `/batch_send` endpoint defined by [MSC2716](matrix-org/matrix-spec-proposals#2716) to the `/v2_alpha` directory. ([\matrix-org#10576](matrix-org#10576)) - Allow multiple custom directories in `read_templates`. ([\matrix-org#10587](matrix-org#10587)) - Re-organize the `synapse.federation.transport.server` module to create smaller files. ([\matrix-org#10590](matrix-org#10590)) - Flatten the `synapse.rest.client` package by moving the contents of `v1` and `v2_alpha` into the parent. ([\matrix-org#10600](matrix-org#10600)) - Build Debian packages for Debian 12 (Bookworm). ([\matrix-org#10612](matrix-org#10612)) - Fix up a couple of links to the database schema documentation. ([\matrix-org#10620](matrix-org#10620)) - Fix a broken link to the upgrade notes. ([\matrix-org#10631](matrix-org#10631))

@Bubu

Synapse 1.41.0 (2021-08-24) =========================== This release adds support for Debian 12 (Bookworm), but **removes support for Ubuntu 20.10 (Groovy Gorilla)**, which reached End of Life last month. Note that when using workers the `/_synapse/admin/v1/users/{userId}/media` must now be handled by media workers. See the [upgrade notes](https://matrix-org.github.io/synapse/latest/upgrade.html) for more information. Features -------- - Enable room capabilities ([MSC3244](matrix-org/matrix-spec-proposals#3244)) by default and set room version 8 as the preferred room version when creating restricted rooms. ([\#10571](matrix-org/synapse#10571)) Synapse 1.41.0rc1 (2021-08-18) ============================== Features -------- - Add `get_userinfo_by_id` method to ModuleApi. ([\#9581](matrix-org/synapse#9581)) - Initial local support for [MSC3266](matrix-org/synapse#10394), Room Summary over the unstable `/rooms/{roomIdOrAlias}/summary` API. ([\#10394](matrix-org/synapse#10394)) - Experimental support for [MSC3288](matrix-org/matrix-spec-proposals#3288), sending `room_type` to the identity server for 3pid invites over the `/store-invite` API. ([\#10435](matrix-org/synapse#10435)) - Add support for sending federation requests through a proxy. Contributed by @Bubu and @dklimpel. See the [upgrade notes](https://matrix-org.github.io/synapse/latest/upgrade.html) for more information. ([\#10596](matrix-org/synapse#10596)). ([\#10475](matrix-org/synapse#10475)) - Add support for "marker" events which makes historical events discoverable for servers that already have all of the scrollback history (part of [MSC2716](matrix-org/matrix-spec-proposals#2716)). ([\#10498](matrix-org/synapse#10498)) - Add a configuration setting for the time a `/sync` response is cached for. ([\#10513](matrix-org/synapse#10513)) - The default logging handler for new installations is now `PeriodicallyFlushingMemoryHandler`, a buffered logging handler which periodically flushes itself. ([\#10518](matrix-org/synapse#10518)) - Add support for new redaction rules for historical events specified in [MSC2716](matrix-org/matrix-spec-proposals#2716). ([\#10538](matrix-org/synapse#10538)) - Add a setting to disable TLS when sending email. ([\#10546](matrix-org/synapse#10546)) - Add pagination to the spaces summary based on updates to [MSC2946](matrix-org/matrix-spec-proposals#2946). ([\#10549](matrix-org/synapse#10549), [\#10560](matrix-org/synapse#10560), [\#10569](matrix-org/synapse#10569), [\#10574](matrix-org/synapse#10574), [\#10575](matrix-org/synapse#10575), [\#10579](matrix-org/synapse#10579), [\#10583](matrix-org/synapse#10583)) - Admin API to delete several media for a specific user. Contributed by @dklimpel. ([\#10558](matrix-org/synapse#10558), [\#10628](matrix-org/synapse#10628)) - Add support for routing `/createRoom` to workers. ([\#10564](matrix-org/synapse#10564)) - Update the Synapse Grafana dashboard. ([\#10570](matrix-org/synapse#10570)) - Add an admin API (`GET /_synapse/admin/username_available`) to check if a username is available (regardless of registration settings). ([\#10578](matrix-org/synapse#10578)) - Allow editing a user's `external_ids` via the "Edit User" admin API. Contributed by @dklimpel. ([\#10598](matrix-org/synapse#10598)) - The Synapse manhole no longer needs coroutines to be wrapped in `defer.ensureDeferred`. ([\#10602](matrix-org/synapse#10602)) - Add option to allow modules to run periodic tasks on all instances, rather than just the one configured to run background tasks. ([\#10638](matrix-org/synapse#10638)) Bugfixes -------- - Add some clarification to the sample config file. Contributed by @Kentokamoto. ([\#10129](matrix-org/synapse#10129)) - Fix a long-standing bug where protocols which are not implemented by any appservices were incorrectly returned via `GET /_matrix/client/r0/thirdparty/protocols`. ([\#10532](matrix-org/synapse#10532)) - Fix exceptions in logs when failing to get remote room list. ([\#10541](matrix-org/synapse#10541)) - Fix longstanding bug which caused the user's presence "status message" to be reset when the user went offline. Contributed by @dklimpel. ([\#10550](matrix-org/synapse#10550)) - Allow public rooms to be previewed in the spaces summary APIs from [MSC2946](matrix-org/matrix-spec-proposals#2946). ([\#10580](matrix-org/synapse#10580)) - Fix a bug introduced in v1.37.1 where an error could occur in the asynchronous processing of PDUs when the queue was empty. ([\#10592](matrix-org/synapse#10592)) - Fix errors on /sync when read receipt data is a string. Only affects homeservers with the experimental flag for [MSC2285](matrix-org/matrix-spec-proposals#2285) enabled. Contributed by @SimonBrandner. ([\#10606](matrix-org/synapse#10606)) - Additional validation for the spaces summary API to avoid errors like `ValueError: Stop argument for islice() must be None or an integer`. The missing validation has existed since v1.31.0. ([\#10611](matrix-org/synapse#10611)) - Revert behaviour introduced in v1.38.0 that strips `org.matrix.msc2732.device_unused_fallback_key_types` from `/sync` when its value is empty. This field should instead always be present according to [MSC2732](https://github.com/matrix-org/matrix-doc/blob/master/proposals/2732-olm-fallback-keys.md). ([\#10623](matrix-org/synapse#10623)) Improved Documentation ---------------------- - Add documentation for configuring a forward proxy. ([\#10443](matrix-org/synapse#10443)) - Updated the reverse proxy documentation to highlight the homserver configuration that is needed to make Synapse aware that is is intentionally reverse proxied. ([\#10551](matrix-org/synapse#10551)) - Update CONTRIBUTING.md to fix index links and the instructions for SyTest in docker. ([\#10599](matrix-org/synapse#10599)) Deprecations and Removals ------------------------- - No longer build `.deb` packages for Ubuntu 20.10 Groovy Gorilla, which has now EOLed. ([\#10588](matrix-org/synapse#10588)) - The `template_dir` configuration settings in the `sso`, `account_validity` and `email` sections of the configuration file are now deprecated in favour of the global `templates.custom_template_directory` setting. See the [upgrade notes](https://matrix-org.github.io/synapse/latest/upgrade.html) for more information. ([\#10596](matrix-org/synapse#10596)) Internal Changes ---------------- - Improve event caching mechanism to avoid having multiple copies of an event in memory at a time. ([\#10119](matrix-org/synapse#10119)) - Reduce errors in PostgreSQL logs due to concurrent serialization errors. ([\#10504](matrix-org/synapse#10504)) - Include room ID in ignored EDU log messages. Contributed by @ilmari. ([\#10507](matrix-org/synapse#10507)) - Add pagination to the spaces summary based on updates to [MSC2946](matrix-org/matrix-spec-proposals#2946). ([\#10527](matrix-org/synapse#10527), [\#10530](matrix-org/synapse#10530)) - Fix CI to not break when run against branches rather than pull requests. ([\#10529](matrix-org/synapse#10529)) - Mark all events stemming from the [MSC2716](matrix-org/matrix-spec-proposals#2716) `/batch_send` endpoint as historical. ([\#10537](matrix-org/synapse#10537)) - Clean up some of the federation event authentication code for clarity. ([\#10539](matrix-org/synapse#10539), [\#10591](matrix-org/synapse#10591)) - Convert `Transaction` and `Edu` objects to attrs. ([\#10542](matrix-org/synapse#10542)) - Update `/batch_send` endpoint to only return `state_events` created by the `state_events_from_before` passed in. ([\#10552](matrix-org/synapse#10552)) - Update contributing.md to warn against rebasing an open PR. ([\#10563](matrix-org/synapse#10563)) - Remove the unused public rooms replication stream. ([\#10565](matrix-org/synapse#10565)) - Clarify error message when failing to join a restricted room. ([\#10572](matrix-org/synapse#10572)) - Remove references to BuildKite in favour of GitHub Actions. ([\#10573](matrix-org/synapse#10573)) - Move `/batch_send` endpoint defined by [MSC2716](matrix-org/matrix-spec-proposals#2716) to the `/v2_alpha` directory. ([\#10576](matrix-org/synapse#10576)) - Allow multiple custom directories in `read_templates`. ([\#10587](matrix-org/synapse#10587)) - Re-organize the `synapse.federation.transport.server` module to create smaller files. ([\#10590](matrix-org/synapse#10590)) - Flatten the `synapse.rest.client` package by moving the contents of `v1` and `v2_alpha` into the parent. ([\#10600](matrix-org/synapse#10600)) - Build Debian packages for Debian 12 (Bookworm). ([\#10612](matrix-org/synapse#10612)) - Fix up a couple of links to the database schema documentation. ([\#10620](matrix-org/synapse#10620)) - Fix a broken link to the upgrade notes. ([\#10631](matrix-org/synapse#10631))

@Bubu

Synapse 1.41.0 (2021-08-24) =========================== This release adds support for Debian 12 (Bookworm), but **removes support for Ubuntu 20.10 (Groovy Gorilla)**, which reached End of Life last month. Note that when using workers the `/_synapse/admin/v1/users/{userId}/media` must now be handled by media workers. See the [upgrade notes](https://matrix-org.github.io/synapse/latest/upgrade.html) for more information. Features -------- - Enable room capabilities ([MSC3244](matrix-org/matrix-spec-proposals#3244)) by default and set room version 8 as the preferred room version when creating restricted rooms. ([\matrix-org#10571](matrix-org#10571)) Synapse 1.41.0rc1 (2021-08-18) ============================== Features -------- - Add `get_userinfo_by_id` method to ModuleApi. ([\matrix-org#9581](matrix-org#9581)) - Initial local support for [MSC3266](matrix-org#10394), Room Summary over the unstable `/rooms/{roomIdOrAlias}/summary` API. ([\matrix-org#10394](matrix-org#10394)) - Experimental support for [MSC3288](matrix-org/matrix-spec-proposals#3288), sending `room_type` to the identity server for 3pid invites over the `/store-invite` API. ([\matrix-org#10435](matrix-org#10435)) - Add support for sending federation requests through a proxy. Contributed by @Bubu and @dklimpel. See the [upgrade notes](https://matrix-org.github.io/synapse/latest/upgrade.html) for more information. ([\matrix-org#10596](matrix-org#10596)). ([\matrix-org#10475](matrix-org#10475)) - Add support for "marker" events which makes historical events discoverable for servers that already have all of the scrollback history (part of [MSC2716](matrix-org/matrix-spec-proposals#2716)). ([\matrix-org#10498](matrix-org#10498)) - Add a configuration setting for the time a `/sync` response is cached for. ([\matrix-org#10513](matrix-org#10513)) - The default logging handler for new installations is now `PeriodicallyFlushingMemoryHandler`, a buffered logging handler which periodically flushes itself. ([\matrix-org#10518](matrix-org#10518)) - Add support for new redaction rules for historical events specified in [MSC2716](matrix-org/matrix-spec-proposals#2716). ([\matrix-org#10538](matrix-org#10538)) - Add a setting to disable TLS when sending email. ([\matrix-org#10546](matrix-org#10546)) - Add pagination to the spaces summary based on updates to [MSC2946](matrix-org/matrix-spec-proposals#2946). ([\matrix-org#10549](matrix-org#10549), [\matrix-org#10560](matrix-org#10560), [\matrix-org#10569](matrix-org#10569), [\matrix-org#10574](matrix-org#10574), [\matrix-org#10575](matrix-org#10575), [\matrix-org#10579](matrix-org#10579), [\matrix-org#10583](matrix-org#10583)) - Admin API to delete several media for a specific user. Contributed by @dklimpel. ([\matrix-org#10558](matrix-org#10558), [\matrix-org#10628](matrix-org#10628)) - Add support for routing `/createRoom` to workers. ([\matrix-org#10564](matrix-org#10564)) - Update the Synapse Grafana dashboard. ([\matrix-org#10570](matrix-org#10570)) - Add an admin API (`GET /_synapse/admin/username_available`) to check if a username is available (regardless of registration settings). ([\matrix-org#10578](matrix-org#10578)) - Allow editing a user's `external_ids` via the "Edit User" admin API. Contributed by @dklimpel. ([\matrix-org#10598](matrix-org#10598)) - The Synapse manhole no longer needs coroutines to be wrapped in `defer.ensureDeferred`. ([\matrix-org#10602](matrix-org#10602)) - Add option to allow modules to run periodic tasks on all instances, rather than just the one configured to run background tasks. ([\matrix-org#10638](matrix-org#10638)) Bugfixes -------- - Add some clarification to the sample config file. Contributed by @Kentokamoto. ([\matrix-org#10129](matrix-org#10129)) - Fix a long-standing bug where protocols which are not implemented by any appservices were incorrectly returned via `GET /_matrix/client/r0/thirdparty/protocols`. ([\matrix-org#10532](matrix-org#10532)) - Fix exceptions in logs when failing to get remote room list. ([\matrix-org#10541](matrix-org#10541)) - Fix longstanding bug which caused the user's presence "status message" to be reset when the user went offline. Contributed by @dklimpel. ([\matrix-org#10550](matrix-org#10550)) - Allow public rooms to be previewed in the spaces summary APIs from [MSC2946](matrix-org/matrix-spec-proposals#2946). ([\matrix-org#10580](matrix-org#10580)) - Fix a bug introduced in v1.37.1 where an error could occur in the asynchronous processing of PDUs when the queue was empty. ([\matrix-org#10592](matrix-org#10592)) - Fix errors on /sync when read receipt data is a string. Only affects homeservers with the experimental flag for [MSC2285](matrix-org/matrix-spec-proposals#2285) enabled. Contributed by @SimonBrandner. ([\matrix-org#10606](matrix-org#10606)) - Additional validation for the spaces summary API to avoid errors like `ValueError: Stop argument for islice() must be None or an integer`. The missing validation has existed since v1.31.0. ([\matrix-org#10611](matrix-org#10611)) - Revert behaviour introduced in v1.38.0 that strips `org.matrix.msc2732.device_unused_fallback_key_types` from `/sync` when its value is empty. This field should instead always be present according to [MSC2732](https://github.com/matrix-org/matrix-doc/blob/master/proposals/2732-olm-fallback-keys.md). ([\matrix-org#10623](matrix-org#10623)) Improved Documentation ---------------------- - Add documentation for configuring a forward proxy. ([\matrix-org#10443](matrix-org#10443)) - Updated the reverse proxy documentation to highlight the homserver configuration that is needed to make Synapse aware that is is intentionally reverse proxied. ([\matrix-org#10551](matrix-org#10551)) - Update CONTRIBUTING.md to fix index links and the instructions for SyTest in docker. ([\matrix-org#10599](matrix-org#10599)) Deprecations and Removals ------------------------- - No longer build `.deb` packages for Ubuntu 20.10 Groovy Gorilla, which has now EOLed. ([\matrix-org#10588](matrix-org#10588)) - The `template_dir` configuration settings in the `sso`, `account_validity` and `email` sections of the configuration file are now deprecated in favour of the global `templates.custom_template_directory` setting. See the [upgrade notes](https://matrix-org.github.io/synapse/latest/upgrade.html) for more information. ([\matrix-org#10596](matrix-org#10596)) Internal Changes ---------------- - Improve event caching mechanism to avoid having multiple copies of an event in memory at a time. ([\matrix-org#10119](matrix-org#10119)) - Reduce errors in PostgreSQL logs due to concurrent serialization errors. ([\matrix-org#10504](matrix-org#10504)) - Include room ID in ignored EDU log messages. Contributed by @ilmari. ([\matrix-org#10507](matrix-org#10507)) - Add pagination to the spaces summary based on updates to [MSC2946](matrix-org/matrix-spec-proposals#2946). ([\matrix-org#10527](matrix-org#10527), [\matrix-org#10530](matrix-org#10530)) - Fix CI to not break when run against branches rather than pull requests. ([\matrix-org#10529](matrix-org#10529)) - Mark all events stemming from the [MSC2716](matrix-org/matrix-spec-proposals#2716) `/batch_send` endpoint as historical. ([\matrix-org#10537](matrix-org#10537)) - Clean up some of the federation event authentication code for clarity. ([\matrix-org#10539](matrix-org#10539), [\matrix-org#10591](matrix-org#10591)) - Convert `Transaction` and `Edu` objects to attrs. ([\matrix-org#10542](matrix-org#10542)) - Update `/batch_send` endpoint to only return `state_events` created by the `state_events_from_before` passed in. ([\matrix-org#10552](matrix-org#10552)) - Update contributing.md to warn against rebasing an open PR. ([\matrix-org#10563](matrix-org#10563)) - Remove the unused public rooms replication stream. ([\matrix-org#10565](matrix-org#10565)) - Clarify error message when failing to join a restricted room. ([\matrix-org#10572](matrix-org#10572)) - Remove references to BuildKite in favour of GitHub Actions. ([\matrix-org#10573](matrix-org#10573)) - Move `/batch_send` endpoint defined by [MSC2716](matrix-org/matrix-spec-proposals#2716) to the `/v2_alpha` directory. ([\matrix-org#10576](matrix-org#10576)) - Allow multiple custom directories in `read_templates`. ([\matrix-org#10587](matrix-org#10587)) - Re-organize the `synapse.federation.transport.server` module to create smaller files. ([\matrix-org#10590](matrix-org#10590)) - Flatten the `synapse.rest.client` package by moving the contents of `v1` and `v2_alpha` into the parent. ([\matrix-org#10600](matrix-org#10600)) - Build Debian packages for Debian 12 (Bookworm). ([\matrix-org#10612](matrix-org#10612)) - Fix up a couple of links to the database schema documentation. ([\matrix-org#10620](matrix-org#10620)) - Fix a broken link to the upgrade notes. ([\matrix-org#10631](matrix-org#10631))

erikjohnston requested review from a team and removed request for a team June 3, 2021 15:29

erikjohnston force-pushed the erikj/better_event_cache branch from e5b3878 to d3b4f09 Compare July 14, 2021 12:59

erikjohnston added 6 commits July 29, 2021 11:23

Hoist up allow_rejected

1a77fe3

Type hints

27e4f5c

Track in flight get events

d472a08

Track in memory events using weakrefs

5afe3d2

Tests

b292141

Newsfile

9d6a77b

erikjohnston force-pushed the erikj/better_event_cache branch from f94884d to 9d6a77b Compare July 29, 2021 10:25

erikjohnston requested a review from a team July 30, 2021 09:05

richvdh suggested changes Aug 2, 2021

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erikjohnston added 8 commits August 3, 2021 09:48

Revert "Track in memory events using weakrefs"

918f7be

This reverts commit 5afe3d2.

Remove weakref test

d120766

Doc funcs may return rejected events.

059c85e

Fixup comment

a8b777d

Refactor _current_event_fetches

af02613

Correctly drop logging contexts

0f9e19c

Add types to ObservableDeferred

3d46c4a

Merge remote-tracking branch 'origin/develop' into erikj/better_event…

213c5c0

…_cache

erikjohnston requested a review from richvdh August 3, 2021 09:08

richvdh approved these changes Aug 3, 2021

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erikjohnston and others added 2 commits August 4, 2021 13:26

Apply suggestions from code review

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Co-authored-by: Richard van der Hoff <[email protected]>

Fix lint

8ea267a

erikjohnston merged commit c37dad6 into develop Aug 4, 2021

erikjohnston deleted the erikj/better_event_cache branch August 4, 2021 12:54

erikjohnston mentioned this pull request Aug 4, 2021

Track in memory events using weakrefs #10533

Merged

erikjohnston mentioned this pull request Aug 26, 2021

Fix perf of fetching the same events many times. #10703

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squahtx mentioned this pull request Apr 25, 2022

Handle cancellation in EventsWorkerStore._get_events_from_cache_or_db #12529

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anoadragon453 mentioned this pull request Sep 20, 2022

completely broken room after purge_room/rejoin #11521

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Improve event caching code #10119

Improve event caching code #10119

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Improve event caching code #10119

Improve event caching code #10119

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erikjohnston commented Jun 3, 2021 •

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