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Clean up Notifier.on_new_room_event code path #8288

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merged 8 commits into from
Sep 10, 2020
Merged

Clean up Notifier.on_new_room_event code path #8288

merged 8 commits into from
Sep 10, 2020

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erikjohnston
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Based on #8287.

The idea here is that we pass the max_stream_id to everything, and only use the stream ID of the particular event to figure out when the max stream position has caught up to the event and we can notify people about it.

This is to maintain the distinction between the position of an item in the stream (i.e. event A has stream ID 513) and a token that can be used to partition the stream (i.e. give me all events after stream ID 352). This distinction becomes important when the tokens are more complicated than a single number, which they will be once we start tracking the position of multiple writers in the tokens.

The valid operations here are:

  1. Is a position before or after a token
  2. Fetching all events between two tokens
  3. Merging multiple tokens to get the "max", i.e. C = max(A, B) means that for all positions P where P is before A or before B, then P is before C.

Future PR will change the token type to a dedicated type.

@erikjohnston
Use max_room_stream_id more
f530e17 
Using the event persisted stream ID sort of doesn't make much sense, as
it may be *after* the current token.
@erikjohnston
Move pusher pool notification to notifier
00cbe42
@erikjohnston
Add type to pusherpool
d283fcd
@erikjohnston
Refactor _on_new_room_event to reduce duplicate calls
9b72316 
There is no point in repeatedly calling `on_new_event` with the same
`max_stream_token`.
@erikjohnston erikjohnston force-pushed the erikj/notifier_cleanup branch from 9788070 to 9b72316 Compare September 9, 2020 16:25
@erikjohnston erikjohnston requested a review from a team September 9, 2020 16:29
clokep
clokep reviewed Sep 9, 2020
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I'm not sure if I'm interpreting this change correctly, but it seems like there could be a performance improvement from this as it somewhat batches updates together before notifying of the new stream position?

I wonder how consistent we are with our usage of "position" vs. "token", it sounds like we're going to have to be more specific soon though.

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@erikjohnston @clokep
Update synapse/notifier.py
996eec4 
Co-authored-by: Patrick Cloke <clokep@users.noreply.github.com>
@erikjohnston
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I'm not sure if I'm interpreting this change correctly, but it seems like there could be a performance improvement from this as it somewhat batches updates together before notifying of the new stream position?

Yes, potentially. I think the common case is for there to be only one item in the list at a time though, so I doubt it'll have any observable impact.

I wonder how consistent we are with our usage of "position" vs. "token", it sounds like we're going to have to be more specific soon though.

Not very consistent at all. I'm going to be changing them to be dedicated types though, which should help a bit.

@erikjohnston erikjohnston requested a review from clokep September 10, 2020 10:05
@erikjohnston erikjohnston merged commit 5d3e306 into develop Sep 10, 2020
@erikjohnston erikjohnston deleted the erikj/notifier_cleanup branch September 10, 2020 12:24
richvdh added a commit that referenced this pull request Oct 1, 2020
@richvdh
Merge tag 'v1.21.0rc1' into develop
0b68577 
Synapse 1.21.0rc1 (2020-10-01)
==============================

Features
--------

- Require the user to confirm that their password should be reset after clicking the email confirmation link. ([\#8004](#8004))
- Add an admin API `GET /_synapse/admin/v1/event_reports` to read entries of table `event_reports`. Contributed by @dklimpel. ([\#8217](#8217))
- Consolidate the SSO error template across all configuration. ([\#8248](#8248), [\#8405](#8405))
- Add a configuration option to specify a whitelist of domains that a user can be redirected to after validating their email or phone number. ([\#8275](#8275), [\#8417](#8417))
- Add experimental support for sharding event persister. ([\#8294](#8294), [\#8387](#8387), [\#8396](#8396), [\#8419](#8419))
- Add the room topic and avatar to the room details admin API. ([\#8305](#8305))
- Add an admin API for querying rooms where a user is a member. Contributed by @dklimpel. ([\#8306](#8306))
- Add `uk.half-shot.msc2778.login.application_service` login type to allow appservices to login. ([\#8320](#8320))
- Add a configuration option that allows existing users to log in with OpenID Connect. Contributed by @BBBSnowball and @OmmyZhang. ([\#8345](#8345))
- Add prometheus metrics for replication requests. ([\#8406](#8406))
- Support passing additional single sign-on parameters to the client. ([\#8413](#8413))
- Add experimental reporting of metrics on expensive rooms for state-resolution. ([\#8420](#8420))
- Add experimental prometheus metric to track numbers of "large" rooms for state resolutiom. ([\#8425](#8425))
- Add prometheus metrics to track federation delays. ([\#8430](#8430))

Bugfixes
--------

- Fix a bug in the media repository where remote thumbnails with the same size but different crop methods would overwrite each other. Contributed by @deepbluev7. ([\#7124](#7124))
- Fix inconsistent handling of non-existent push rules, and stop tracking the `enabled` state of removed push rules. ([\#7796](#7796))
- Fix a longstanding bug when storing a media file with an empty `upload_name`. ([\#7905](#7905))
- Fix messages not being sent over federation until an event is sent into the same room. ([\#8230](#8230), [\#8247](#8247), [\#8258](#8258), [\#8272](#8272), [\#8322](#8322))
- Fix a longstanding bug where files that could not be thumbnailed would result in an Internal Server Error. ([\#8236](#8236), [\#8435](#8435))
- Upgrade minimum version of `canonicaljson` to version 1.4.0, to fix an unicode encoding issue. ([\#8262](#8262))
- Fix longstanding bug which could lead to incomplete database upgrades on SQLite. ([\#8265](#8265))
- Fix stack overflow when stderr is redirected to the logging system, and the logging system encounters an error. ([\#8268](#8268))
- Fix a bug which cause the logging system to report errors, if `DEBUG` was enabled and no `context` filter was applied. ([\#8278](#8278))
- Fix edge case where push could get delayed for a user until a later event was pushed. ([\#8287](#8287))
- Fix fetching malformed events from remote servers. ([\#8324](#8324))
- Fix `UnboundLocalError` from occuring when appservices send a malformed register request. ([\#8329](#8329))
- Don't send push notifications to expired user accounts. ([\#8353](#8353))
- Fix a regression in v1.19.0 with reactivating users through the admin API. ([\#8362](#8362))
- Fix a bug where during device registration the length of the device name wasn't limited. ([\#8364](#8364))
- Include `guest_access` in the fields that are checked for null bytes when updating `room_stats_state`. Broke in v1.7.2. ([\#8373](#8373))
- Fix theoretical race condition where events are not sent down `/sync` if the synchrotron worker is restarted without restarting other workers. ([\#8374](#8374))
- Fix a bug which could cause errors in rooms with malformed membership events, on servers using sqlite. ([\#8385](#8385))
- Fix "Re-starting finished log context" warning when receiving an event we already had over federation. ([\#8398](#8398))
- Fix incorrect handling of timeouts on outgoing HTTP requests. ([\#8400](#8400))
- Fix a regression in v1.20.0 in the `synapse_port_db` script regarding the `ui_auth_sessions_ips` table. ([\#8410](#8410))
- Remove unnecessary 3PID registration check when resetting password via an email address. Bug introduced in v0.34.0rc2. ([\#8414](#8414))

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

- Add `/_synapse/client` to the reverse proxy documentation. ([\#8227](#8227))
- Add note to the reverse proxy settings documentation about disabling Apache's mod_security2. Contributed by Julian Fietkau (@jfietkau). ([\#8375](#8375))
- Improve description of `server_name` config option in `homserver.yaml`. ([\#8415](#8415))

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

- Drop support for `prometheus_client` older than 0.4.0. ([\#8426](#8426))

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

- Fix tests on distros which disable TLSv1.0. Contributed by @danc86. ([\#8208](#8208))
- Simplify the distributor code to avoid unnecessary work. ([\#8216](#8216))
- Remove the `populate_stats_process_rooms_2` background job and restore functionality to `populate_stats_process_rooms`. ([\#8243](#8243))
- Clean up type hints for `PaginationConfig`. ([\#8250](#8250), [\#8282](#8282))
- Track the latest event for every destination and room for catch-up after federation outage. ([\#8256](#8256))
- Fix non-user visible bug in implementation of `MultiWriterIdGenerator.get_current_token_for_writer`. ([\#8257](#8257))
- Switch to the JSON implementation from the standard library. ([\#8259](#8259))
- Add type hints to `synapse.util.async_helpers`. ([\#8260](#8260))
- Simplify tests that mock asynchronous functions. ([\#8261](#8261))
- Add type hints to `StreamToken` and `RoomStreamToken` classes. ([\#8279](#8279))
- Change `StreamToken.room_key` to be a `RoomStreamToken` instance. ([\#8281](#8281))
- Refactor notifier code to correctly use the max event stream position. ([\#8288](#8288))
- Use slotted classes where possible. ([\#8296](#8296))
- Support testing the local Synapse checkout against the [Complement homeserver test suite](https://github.com/matrix-org/complement/). ([\#8317](#8317))
- Update outdated usages of `metaclass` to python 3 syntax. ([\#8326](#8326))
- Move lint-related dependencies to package-extra field, update CONTRIBUTING.md to utilise this. ([\#8330](#8330), [\#8377](#8377))
- Use the `admin_patterns` helper in additional locations. ([\#8331](#8331))
- Fix test logging to allow braces in log output. ([\#8335](#8335))
- Remove `__future__` imports related to Python 2 compatibility. ([\#8337](#8337))
- Simplify `super()` calls to Python 3 syntax. ([\#8344](#8344))
- Fix bad merge from `release-v1.20.0` branch to `develop`. ([\#8354](#8354))
- Factor out a `_send_dummy_event_for_room` method. ([\#8370](#8370))
- Improve logging of state resolution. ([\#8371](#8371))
- Add type annotations to `SimpleHttpClient`. ([\#8372](#8372))
- Refactor ID generators to use `async with` syntax. ([\#8383](#8383))
- Add `EventStreamPosition` type. ([\#8388](#8388))
- Create a mechanism for marking tests "logcontext clean". ([\#8399](#8399))
- A pair of tiny cleanups in the federation request code. ([\#8401](#8401))
- Add checks on startup that PostgreSQL sequences are consistent with their associated tables. ([\#8402](#8402))
- Do not include appservice users when calculating the total MAU for a server. ([\#8404](#8404))
- Typing fixes for `synapse.handlers.federation`. ([\#8422](#8422))
- Various refactors to simplify stream token handling. ([\#8423](#8423))
- Make stream token serializing/deserializing async. ([\#8427](#8427))
netbsd-srcmastr pushed a commit to NetBSD/pkgsrc that referenced this pull request Oct 17, 2020
@Midar
Update chat/matrix-synapse to 1.21.2
0582f7e 
Synapse 1.21.2 (2020-10-15)
===========================

Debian packages and Docker images have been rebuilt using the latest versions of dependency libraries, including authlib 0.15.1. Please see bugfixes below.

Security advisory
-----------------

* HTML pages served via Synapse were vulnerable to cross-site scripting (XSS)
  attacks. All server administrators are encouraged to upgrade.
  ([\#8444](matrix-org/synapse#8444))
  ([CVE-2020-26891](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-26891))

  This fix was originally included in v1.21.0 but was missing a security advisory.

  This was reported by [Denis Kasak](https://github.com/dkasak).

Bugfixes
--------

- Fix rare bug where sending an event would fail due to a racey assertion. ([\#8530](matrix-org/synapse#8530))
- An updated version of the authlib dependency is included in the Docker and Debian images to fix an issue using OpenID Connect. See [\#8534](matrix-org/synapse#8534) for details.


Synapse 1.21.1 (2020-10-13)
===========================

This release fixes a regression in v1.21.0 that prevented debian packages from being built.
It is otherwise identical to v1.21.0.

Synapse 1.21.0 (2020-10-12)
===========================

No significant changes since v1.21.0rc3.

As [noted in
v1.20.0](https://github.com/matrix-org/synapse/blob/release-v1.21.0/CHANGES.md#synapse-1200-2020-09-22),
a future release will drop support for accessing Synapse's
[Admin API](https://github.com/matrix-org/synapse/tree/master/docs/admin_api) under the
`/_matrix/client/*` endpoint prefixes. At that point, the Admin API will only
be accessible under `/_synapse/admin`.


Synapse 1.21.0rc3 (2020-10-08)
==============================

Bugfixes
--------

- Fix duplication of events on high traffic servers, caused by PostgreSQL `could not serialize access due to concurrent update` errors. ([\#8456](matrix-org/synapse#8456))


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

- Add Groovy Gorilla to the list of distributions we build `.deb`s for. ([\#8475](matrix-org/synapse#8475))


Synapse 1.21.0rc2 (2020-10-02)
==============================

Features
--------

- Convert additional templates from inline HTML to Jinja2 templates. ([\#8444](matrix-org/synapse#8444))

Bugfixes
--------

- Fix a regression in v1.21.0rc1 which broke thumbnails of remote media. ([\#8438](matrix-org/synapse#8438))
- Do not expose the experimental `uk.half-shot.msc2778.login.application_service` flow in the login API, which caused a compatibility problem with Element iOS. ([\#8440](matrix-org/synapse#8440))
- Fix malformed log line in new federation "catch up" logic. ([\#8442](matrix-org/synapse#8442))
- Fix DB query on startup for negative streams which caused long start up times. Introduced in [\#8374](matrix-org/synapse#8374). ([\#8447](matrix-org/synapse#8447))


Synapse 1.21.0rc1 (2020-10-01)
==============================

Features
--------

- Require the user to confirm that their password should be reset after clicking the email confirmation link. ([\#8004](matrix-org/synapse#8004))
- Add an admin API `GET /_synapse/admin/v1/event_reports` to read entries of table `event_reports`. Contributed by @dklimpel. ([\#8217](matrix-org/synapse#8217))
- Consolidate the SSO error template across all configuration. ([\#8248](matrix-org/synapse#8248), [\#8405](matrix-org/synapse#8405))
- Add a configuration option to specify a whitelist of domains that a user can be redirected to after validating their email or phone number. ([\#8275](matrix-org/synapse#8275), [\#8417](matrix-org/synapse#8417))
- Add experimental support for sharding event persister. ([\#8294](matrix-org/synapse#8294), [\#8387](matrix-org/synapse#8387), [\#8396](matrix-org/synapse#8396), [\#8419](matrix-org/synapse#8419))
- Add the room topic and avatar to the room details admin API. ([\#8305](matrix-org/synapse#8305))
- Add an admin API for querying rooms where a user is a member. Contributed by @dklimpel. ([\#8306](matrix-org/synapse#8306))
- Add `uk.half-shot.msc2778.login.application_service` login type to allow appservices to login. ([\#8320](matrix-org/synapse#8320))
- Add a configuration option that allows existing users to log in with OpenID Connect. Contributed by @BBBSnowball and @OmmyZhang. ([\#8345](matrix-org/synapse#8345))
- Add prometheus metrics for replication requests. ([\#8406](matrix-org/synapse#8406))
- Support passing additional single sign-on parameters to the client. ([\#8413](matrix-org/synapse#8413))
- Add experimental reporting of metrics on expensive rooms for state-resolution. ([\#8420](matrix-org/synapse#8420))
- Add experimental prometheus metric to track numbers of "large" rooms for state resolutiom. ([\#8425](matrix-org/synapse#8425))
- Add prometheus metrics to track federation delays. ([\#8430](matrix-org/synapse#8430))


Bugfixes
--------

- Fix a bug in the media repository where remote thumbnails with the same size but different crop methods would overwrite each other. Contributed by @deepbluev7. ([\#7124](matrix-org/synapse#7124))
- Fix inconsistent handling of non-existent push rules, and stop tracking the `enabled` state of removed push rules. ([\#7796](matrix-org/synapse#7796))
- Fix a longstanding bug when storing a media file with an empty `upload_name`. ([\#7905](matrix-org/synapse#7905))
- Fix messages not being sent over federation until an event is sent into the same room. ([\#8230](matrix-org/synapse#8230), [\#8247](matrix-org/synapse#8247), [\#8258](matrix-org/synapse#8258), [\#8272](matrix-org/synapse#8272), [\#8322](matrix-org/synapse#8322))
- Fix a longstanding bug where files that could not be thumbnailed would result in an Internal Server Error. ([\#8236](matrix-org/synapse#8236), [\#8435](matrix-org/synapse#8435))
- Upgrade minimum version of `canonicaljson` to version 1.4.0, to fix an unicode encoding issue. ([\#8262](matrix-org/synapse#8262))
- Fix longstanding bug which could lead to incomplete database upgrades on SQLite. ([\#8265](matrix-org/synapse#8265))
- Fix stack overflow when stderr is redirected to the logging system, and the logging system encounters an error. ([\#8268](matrix-org/synapse#8268))
- Fix a bug which cause the logging system to report errors, if `DEBUG` was enabled and no `context` filter was applied. ([\#8278](matrix-org/synapse#8278))
- Fix edge case where push could get delayed for a user until a later event was pushed. ([\#8287](matrix-org/synapse#8287))
- Fix fetching malformed events from remote servers. ([\#8324](matrix-org/synapse#8324))
- Fix `UnboundLocalError` from occuring when appservices send a malformed register request. ([\#8329](matrix-org/synapse#8329))
- Don't send push notifications to expired user accounts. ([\#8353](matrix-org/synapse#8353))
- Fix a regression in v1.19.0 with reactivating users through the admin API. ([\#8362](matrix-org/synapse#8362))
- Fix a bug where during device registration the length of the device name wasn't limited. ([\#8364](matrix-org/synapse#8364))
- Include `guest_access` in the fields that are checked for null bytes when updating `room_stats_state`. Broke in v1.7.2. ([\#8373](matrix-org/synapse#8373))
- Fix theoretical race condition where events are not sent down `/sync` if the synchrotron worker is restarted without restarting other workers. ([\#8374](matrix-org/synapse#8374))
- Fix a bug which could cause errors in rooms with malformed membership events, on servers using sqlite. ([\#8385](matrix-org/synapse#8385))
- Fix "Re-starting finished log context" warning when receiving an event we already had over federation. ([\#8398](matrix-org/synapse#8398))
- Fix incorrect handling of timeouts on outgoing HTTP requests. ([\#8400](matrix-org/synapse#8400))
- Fix a regression in v1.20.0 in the `synapse_port_db` script regarding the `ui_auth_sessions_ips` table. ([\#8410](matrix-org/synapse#8410))
- Remove unnecessary 3PID registration check when resetting password via an email address. Bug introduced in v0.34.0rc2. ([\#8414](matrix-org/synapse#8414))


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

- Add `/_synapse/client` to the reverse proxy documentation. ([\#8227](matrix-org/synapse#8227))
- Add note to the reverse proxy settings documentation about disabling Apache's mod_security2. Contributed by Julian Fietkau (@jfietkau). ([\#8375](matrix-org/synapse#8375))
- Improve description of `server_name` config option in `homserver.yaml`. ([\#8415](matrix-org/synapse#8415))


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

- Drop support for `prometheus_client` older than 0.4.0. ([\#8426](matrix-org/synapse#8426))


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

- Fix tests on distros which disable TLSv1.0. Contributed by @danc86. ([\#8208](matrix-org/synapse#8208))
- Simplify the distributor code to avoid unnecessary work. ([\#8216](matrix-org/synapse#8216))
- Remove the `populate_stats_process_rooms_2` background job and restore functionality to `populate_stats_process_rooms`. ([\#8243](matrix-org/synapse#8243))
- Clean up type hints for `PaginationConfig`. ([\#8250](matrix-org/synapse#8250), [\#8282](matrix-org/synapse#8282))
- Track the latest event for every destination and room for catch-up after federation outage. ([\#8256](matrix-org/synapse#8256))
- Fix non-user visible bug in implementation of `MultiWriterIdGenerator.get_current_token_for_writer`. ([\#8257](matrix-org/synapse#8257))
- Switch to the JSON implementation from the standard library. ([\#8259](matrix-org/synapse#8259))
- Add type hints to `synapse.util.async_helpers`. ([\#8260](matrix-org/synapse#8260))
- Simplify tests that mock asynchronous functions. ([\#8261](matrix-org/synapse#8261))
- Add type hints to `StreamToken` and `RoomStreamToken` classes. ([\#8279](matrix-org/synapse#8279))
- Change `StreamToken.room_key` to be a `RoomStreamToken` instance. ([\#8281](matrix-org/synapse#8281))
- Refactor notifier code to correctly use the max event stream position. ([\#8288](matrix-org/synapse#8288))
- Use slotted classes where possible. ([\#8296](matrix-org/synapse#8296))
- Support testing the local Synapse checkout against the [Complement homeserver test suite](https://github.com/matrix-org/complement/). ([\#8317](matrix-org/synapse#8317))
- Update outdated usages of `metaclass` to python 3 syntax. ([\#8326](matrix-org/synapse#8326))
- Move lint-related dependencies to package-extra field, update CONTRIBUTING.md to utilise this. ([\#8330](matrix-org/synapse#8330), [\#8377](matrix-org/synapse#8377))
- Use the `admin_patterns` helper in additional locations. ([\#8331](matrix-org/synapse#8331))
- Fix test logging to allow braces in log output. ([\#8335](matrix-org/synapse#8335))
- Remove `__future__` imports related to Python 2 compatibility. ([\#8337](matrix-org/synapse#8337))
- Simplify `super()` calls to Python 3 syntax. ([\#8344](matrix-org/synapse#8344))
- Fix bad merge from `release-v1.20.0` branch to `develop`. ([\#8354](matrix-org/synapse#8354))
- Factor out a `_send_dummy_event_for_room` method. ([\#8370](matrix-org/synapse#8370))
- Improve logging of state resolution. ([\#8371](matrix-org/synapse#8371))
- Add type annotations to `SimpleHttpClient`. ([\#8372](matrix-org/synapse#8372))
- Refactor ID generators to use `async with` syntax. ([\#8383](matrix-org/synapse#8383))
- Add `EventStreamPosition` type. ([\#8388](matrix-org/synapse#8388))
- Create a mechanism for marking tests "logcontext clean". ([\#8399](matrix-org/synapse#8399))
- A pair of tiny cleanups in the federation request code. ([\#8401](matrix-org/synapse#8401))
- Add checks on startup that PostgreSQL sequences are consistent with their associated tables. ([\#8402](matrix-org/synapse#8402))
- Do not include appservice users when calculating the total MAU for a server. ([\#8404](matrix-org/synapse#8404))
- Typing fixes for `synapse.handlers.federation`. ([\#8422](matrix-org/synapse#8422))
- Various refactors to simplify stream token handling. ([\#8423](matrix-org/synapse#8423))
- Make stream token serializing/deserializing async. ([\#8427](matrix-org/synapse#8427))
babolivier pushed a commit that referenced this pull request Sep 1, 2021
@anoadragon453
Merge commit '837293c31' into anoa/dinsic_release_1_21_x
7176832 
* commit '837293c31':
  Remove obsolete __future__ imports (#8337)
  Use admin_patterns for all admin APIs. (#8331)
  Fix a potential bug of UnboundLocalError (#8329)
  Switch metaclass initialization to python 3-compatible syntax (#8326)
  Catch-up after Federation Outage (split, 4): catch-up loop (#8272)
  Use slots in attrs classes where possible (#8296)
  Fix typos in comments.
  Add the topic and avatar to the room details admin API (#8305)
  Improve SAML error messages (#8248)
  Add experimental support for sharding event persister. Again. (#8294)
  Make `StreamToken.room_key` be a `RoomStreamToken` instance. (#8281)
  Use TLSv1.2 for fake servers in tests (#8208)
  Add /_synapse/client to the reverse proxy docs (#8227)
  Clean up `Notifier.on_new_room_event` code path (#8288)
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@erikjohnston @clokep