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Mark /relations endpoint as usable on workers. #14028

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Oct 12, 2022
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@clokep clokep commented Oct 3, 2022

This has always been safe to my knowledge, but now there are complement tests (matrix-org/complement#467).

Fixes #12290

@clokep clokep marked this pull request as ready for review October 3, 2022 16:33
@clokep clokep requested a review from a team as a code owner October 3, 2022 16:33
@clokep clokep changed the title Mark relations as usable on workers. Mark /relations endpoint as usable on workers. Oct 3, 2022
realtyem added a commit to realtyem/synapse-unraid that referenced this pull request Oct 3, 2022
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realtyem commented Oct 3, 2022

For what it's worth, I get an error on isolated client_reader tests.
My test repo

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clokep commented Oct 3, 2022

Hmmm, maybe we're not mounting that properly, but why isn't it failing in this repo?! 😢

@clokep clokep removed the request for review from a team October 3, 2022 20:13
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realtyem commented Oct 3, 2022 via email

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clokep commented Oct 3, 2022

Ah ok, so this goes to my comment above saying that I don't. Now if adding the config is all that's needed. Thanks for answering!

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realtyem commented Oct 4, 2022

That looks good for testing with the docker image. Outside of that is out of my scope of expertise. For example: I don't know enough about the internals of how generic_workers become actual workers to say that defining an endpoint and giving it an arbitrary name is sufficient. Documentation is...misleading, in this aspect.

scripts-dev/complement.sh Outdated Show resolved Hide resolved
@clokep clokep requested a review from a team October 4, 2022 20:03
Co-authored-by: Eric Eastwood <[email protected]>
MadLittleMods added a commit to matrix-org/complement that referenced this pull request Oct 6, 2022
Spawning from matrix-org/synapse#14028 (comment)

The reason they failed before was because we're fighting against
stale caches across workers racing while waiting for invalidation,
see matrix-org/synapse#13185 (comment)

> Here is what happens:
>
>  1. `serverB` has `event1` stored as an `outlier` from previous requests (specifically from MSC3030 jump to date pulling in a missing `prev_event` after backfilling)
>  1. Client on `serverB` calls `/messages?dir=b`
>  1. `serverB:client_reader1` accepts the request and drives things
>  1. `serverB:client_reader1` has some backward extremities in range and requests `/backfill` from `serverA`
>  1. `serverB:client_reader1` processes the events from backfill including `event1` and puts them in the `_event_persist_queue`
>  1. `serverB:master` picks up the events from the `_event_persist_queue` and persists them to the database, de-outliers `event1` and invalidates its own cache and sends them over replication
>  1. `serverB:client_reader1` starts assembling the `/messages` response and gets `event1` out of the stale cache still as an `outlier`
>  1. `serverB:client_reader1` responds to the `/messages` request without `event1` because `outliers` are filtered out
>  1. `serverB:client_reader1` finally gets the replication data and invalidates its own cache for `event1` (too late, we already got the events from the stale cache and responded)
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Can you update the docs/workers.md documentation please?

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clokep commented Oct 12, 2022

Can you update the docs/workers.md documentation please?

This PR already updates that w/ the new endpoint. Is there an additional change you'd like to see?

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Can you update the docs/workers.md documentation please?

This PR already updates that w/ the new endpoint. Is there an additional change you'd like to see?

I swear that wasn't there before!!!!

@clokep clokep merged commit c604d2c into develop Oct 12, 2022
@clokep clokep deleted the clokep/rel-workers branch October 12, 2022 10:46
realtyem added a commit to realtyem/synapse-old that referenced this pull request Oct 12, 2022
clokep added a commit that referenced this pull request Oct 12, 2022
MadLittleMods added a commit to matrix-org/complement that referenced this pull request Oct 13, 2022
Spawning from matrix-org/synapse#14028 (comment)

CI failure: https://github.com/matrix-org/synapse/actions/runs/3182998161/jobs/5189731097#step:6:15343 (from [discussion](matrix-org/synapse#14028 (comment)))
```
WORKERS=1 POSTGRES=1 COMPLEMENT_ALWAYS_PRINT_SERVER_LOGS=1 COMPLEMENT_DIR=../complement ./scripts-dev/complement.sh -run TestJumpToDateEndpoint/parallel/federation/can_paginate_after_getting_remote_event_from_timestamp_to_event_endpoint
```

### Why did this test fail with workers before?

The reason they failed before was because we're fighting against stale caches across workers racing while waiting for invalidation, see matrix-org/synapse#13185 (comment)

> Here is what happens:
>
>  1. `serverB` has `event1` stored as an `outlier` from previous requests (specifically from MSC3030 jump to date pulling in a missing `prev_event` after backfilling)
>  1. Client on `serverB` calls `/messages?dir=b`
>  1. `serverB:client_reader1` accepts the request and drives things
>  1. `serverB:client_reader1` has some backward extremities in range and requests `/backfill` from `serverA`
>  1. `serverB:client_reader1` processes the events from backfill including `event1` and puts them in the `_event_persist_queue`
>  1. `serverB:master` picks up the events from the `_event_persist_queue` and persists them to the database, de-outliers `event1` and invalidates its own cache and sends them over replication
>  1. `serverB:client_reader1` starts assembling the `/messages` response and gets `event1` out of the stale cache still as an `outlier`
>  1. `serverB:client_reader1` responds to the `/messages` request without `event1` because `outliers` are filtered out
>  1. `serverB:client_reader1` finally gets the replication data and invalidates its own cache for `event1` (too late, we already got the events from the stale cache and responded)
netbsd-srcmastr pushed a commit to NetBSD/pkgsrc that referenced this pull request Oct 29, 2022
Upstream changes:

Synapse 1.70.1 (2022-10-28)
===========================

(bugfixes)


Synapse 1.70.0 (2022-10-26)
===========================

Features
--------

- Support for
  [MSC3856](matrix-org/matrix-spec-proposals#3856):
  threads list
  API. ([\#13394](matrix-org/synapse#13394),
  [\#14171](matrix-org/synapse#14171),
  [\#14175](matrix-org/synapse#14175))

- Support for thread-specific notifications & receipts
  ([MSC3771](matrix-org/matrix-spec-proposals#3771)
  and
  [MSC3773](matrix-org/matrix-spec-proposals#3773)). ([\#13776](matrix-org/synapse#13776),
  [\#13824](matrix-org/synapse#13824),
  [\#13877](matrix-org/synapse#13877),
  [\#13878](matrix-org/synapse#13878),
  [\#14050](matrix-org/synapse#14050),
  [\#14140](matrix-org/synapse#14140),
  [\#14159](matrix-org/synapse#14159),
  [\#14163](matrix-org/synapse#14163),
  [\#14174](matrix-org/synapse#14174),
  [\#14222](matrix-org/synapse#14222))

- Stop fetching missing `prev_events` after we already know their
  signature is
  invalid. ([\#13816](matrix-org/synapse#13816))

- Send application service access tokens as a header (and query
  parameter). Implements
  [MSC2832](matrix-org/matrix-spec-proposals#2832). ([\#13996](matrix-org/synapse#13996))

- Ignore server ACL changes when generating pushes. Implements
  [MSC3786](matrix-org/matrix-spec-proposals#3786). ([\#13997](matrix-org/synapse#13997))

- Experimental support for redirecting to an implementation of a
  [MSC3886](matrix-org/matrix-spec-proposals#3886)
  HTTP rendezvous
  service. ([\#14018](matrix-org/synapse#14018))

- The `/relations` endpoint can now be used on
  workers. ([\#14028](matrix-org/synapse#14028))

- Advertise support for Matrix 1.3 and 1.4 on
  `/_matrix/client/versions`. ([\#14032](matrix-org/synapse#14032),
  [\#14184](matrix-org/synapse#14184))

- Improve validation of request bodies for the [Device
  Management](https://spec.matrix.org/v1.4/client-server-api/#device-management)
  and [MSC2697 Device
  Dehyrdation](matrix-org/matrix-spec-proposals#2697)
  client-server API
  endpoints. ([\#14054](matrix-org/synapse#14054))

- Experimental support for
  [MSC3874](matrix-org/matrix-spec-proposals#3874):
  Filtering threads from the `/messages`
  endpoint. ([\#14148](matrix-org/synapse#14148))

- Improve the validation of the following PUT endpoints:
  [`/directory/room/{roomAlias}`](https://spec.matrix.org/v1.4/client-server-api/#put_matrixclientv3directoryroomroomalias),
  [`/directory/list/room/{roomId}`](https://spec.matrix.org/v1.4/client-server-api/#put_matrixclientv3directorylistroomroomid)
  and
  [`/directory/list/appservice/{networkId}/{roomId}`](https://spec.matrix.org/v1.4/application-service-api/#put_matrixclientv3directorylistappservicenetworkidroomid). ([\#14179](matrix-org/synapse#14179))


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

- Remove the experimental implementation of
  [MSC3772](matrix-org/matrix-spec-proposals#3772). ([\#14094](matrix-org/synapse#14094))

- Remove the unstable identifier for
  [MSC3715](matrix-org/matrix-spec-proposals#3715). ([\#14106](matrix-org/synapse#14106),
  [\#14146](matrix-org/synapse#14146))
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Run /relations on workers
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