Commit Graph

32 Commits

Author SHA1 Message Date
David Robertson 62a1a9be52
Describe which rate limiter was hit in logs (#16135) 2023-08-30 00:39:39 +01:00
Patrick Cloke ad3f43be9a
Run pyupgrade for python 3.7 & 3.8. (#16110) 2023-08-15 08:11:20 -04:00
Sean Quah d0de452d12
Fix `HomeServer`s leaking during `trial` test runs (#15630)
This change fixes two memory leaks during `trial` test runs.

Garbage collection is disabled during each test case and a gen-0 GC is
run at the end of each test. However, when the gen-0 GC is run, the
`TestCase` object usually still holds references to the `HomeServer`
used during the test. As a result, the `HomeServer` gets promoted to
gen-1 and then never garbage collected.

Fix this by periodically running full GCs.

Additionally, fix `HomeServer`s leaking after tests that touch inbound
federation due to `FederationRateLimiter`s adding themselves to a global
set, by turning the set into a `WeakSet`.

Resolves #15622.

Signed-off-by: Sean Quah <seanq@matrix.org>
2023-05-19 11:17:12 +01:00
Sean Quah a302d3ecf7
Remove unnecessary reactor reference from `_PerHostRatelimiter` (#14842)
Fix up #14812 to avoid introducing a reference to the reactor.

Signed-off-by: Sean Quah <seanq@matrix.org>
2023-01-16 13:16:19 +00:00
Sean Quah 772e8c2385
Fix stack overflow in `_PerHostRatelimiter` due to synchronous requests (#14812)
When there are many synchronous requests waiting on a
`_PerHostRatelimiter`, each request will be started recursively just
after the previous request has completed. Under the right conditions,
this leads to stack exhaustion.

A common way for requests to become synchronous is when the remote
client disconnects early, because the homeserver is overloaded and slow
to respond.

Avoid stack exhaustion under these conditions by deferring subsequent
requests until the next reactor tick.

Fixes #14480.

Signed-off-by: Sean Quah <seanq@matrix.org>
2023-01-13 00:16:21 +00:00
Patrick Cloke d8cc86eff4
Remove redundant types from comments. (#14412)
Remove type hints from comments which have been added
as Python type hints. This helps avoid drift between comments
and reality, as well as removing redundant information.

Also adds some missing type hints which were simple to fill in.
2022-11-16 15:25:24 +00:00
Eric Eastwood 1eea73b413
Fix rate limit metrics registering twice and misreporting (#13649)
* Fix rate limit metrics registering twice and misreporting

Fix https://github.com/matrix-org/synapse/issues/13641

* Fix lints

* Add changelog

* Document `metrics_name=None`.
2022-08-30 12:08:29 +01:00
Sean Quah b251cff819
Fix incorrect juggling of logging contexts in `_PerHostRatelimiter` (#13554)
Signed-off-by: Sean Quah <seanq@matrix.org>

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>
2022-08-18 16:26:26 +01:00
Eric Eastwood d64653d062
Track number of hosts affected by the rate limiter (#13541)
Track number of hosts affected by the rate limiter so we can differentiate one really noisy homeserver from a general ratelimit tuning problem across the federation.

Follow-up to https://github.com/matrix-org/synapse/pull/13534

Part of https://github.com/matrix-org/synapse/issues/13356
2022-08-18 10:05:07 -05:00
Eric Eastwood 49d04e43df
Add metrics to track how the rate limiter is affecting requests (sleep/reject) (#13534)
Related to https://github.com/matrix-org/synapse/pull/13499

Part of https://github.com/matrix-org/synapse/issues/13356
2022-08-17 16:10:07 -05:00
Eric Eastwood c6ee9c0ee4
Add metrics to track rate limiter queue timing (#13544) 2022-08-17 10:38:05 +01:00
Eric Eastwood 344a2f767c
Instrument `FederationStateIdsServlet` - `/state_ids` (#13499)
Instrument FederationStateIdsServlet - `/state_ids` so it's easier to follow what's going on in Jaeger when viewing a trace.
2022-08-15 19:41:23 +01:00
Dirk Klimpel d6e94ad9d9
Rename `RateLimitConfig` to `RatelimitSettings` (#13442) 2022-08-03 10:40:20 +01:00
reivilibre 524b8ead77
Add types to synapse.util. (#10601) 2021-09-10 17:03:18 +01:00
Jonathan de Jong 4b965c862d
Remove redundant "coding: utf-8" lines (#9786)
Part of #9744

Removes all redundant `# -*- coding: utf-8 -*-` lines from files, as python 3 automatically reads source code as utf-8 now.

`Signed-off-by: Jonathan de Jong <jonathan@automatia.nl>`
2021-04-14 15:34:27 +01:00
Patrick Cloke c619253db8
Stop sub-classing object (#8249) 2020-09-04 06:54:56 -04:00
Andrew Morgan f4e6495b5d
Performance improvements and refactor of Ratelimiter (#7595)
While working on https://github.com/matrix-org/synapse/issues/5665 I found myself digging into the `Ratelimiter` class and seeing that it was both:

* Rather undocumented, and
* causing a *lot* of config checks

This PR attempts to refactor and comment the `Ratelimiter` class, as well as encourage config file accesses to only be done at instantiation. 

Best to be reviewed commit-by-commit.
2020-06-05 10:47:20 +01:00
Richard van der Hoff 9481707a52
Fixes to the federation rate limiter (#5621)
- Put the default window_size back to 1000ms (broken by #5181)
- Make the `rc_federation` config actually do something
- fix an off-by-one error in the 'concurrent' limit
- Avoid creating an unused `_PerHostRatelimiter` object for every single
  incoming request
2019-07-05 11:10:19 +01:00
Amber Brown 463b072b12
Move logging utilities out of the side drawer of util/ and into logging/ (#5606) 2019-07-04 00:07:04 +10:00
Amber Brown 32e7c9e7f2
Run Black. (#5482) 2019-06-20 19:32:02 +10:00
Amber Brown f1e5b41388
Make all the rate limiting options more consistent (#5181) 2019-05-15 12:06:04 -05:00
Richard van der Hoff 33b40d0a25 Make FederationRateLimiter queue requests properly
popitem removes the *most recent* item by default [1]. We want the oldest.

Fixes #3524

[1]: https://docs.python.org/2/library/collections.html#collections.OrderedDict.popitem
2018-07-13 16:19:40 +01:00
Amber Brown 49af402019 run isort 2018-07-09 16:09:20 +10:00
Amber Brown 77ac14b960
Pass around the reactor explicitly (#3385) 2018-06-22 09:37:10 +01:00
Richard van der Hoff a7fe62f0cb Fix logcontext leaks in rate limiter 2018-05-03 12:31:59 +01:00
Richard van der Hoff 2a13af23bc Use run_in_background in preference to preserve_fn
While I was going through uses of preserve_fn for other PRs, I converted places
which only use the wrapped function once to use run_in_background, to avoid
creating the function object.
2018-04-27 12:55:51 +01:00
Mark Haines 7e2f971c08 Remove some unused functions (#711)
* Remove some unused functions

* get_room_events_stream is only used in tests

* is_exclusive_room might actually be something we want
2016-04-08 14:01:56 +01:00
Erik Johnston 2c1fbea531 Fix up logcontexts 2016-02-08 14:26:45 +00:00
Daniel Wagner-Hall d83d004ccd Fix flake8 warnings for new flake8 2016-02-02 17:18:50 +00:00
Matthew Hodgson 6c28ac260c copyrights 2016-01-07 04:26:29 +00:00
Erik Johnston 3077cb2915 Use contextlib.contextmanager instead of a custom class 2015-03-02 13:32:44 +00:00
Erik Johnston 0554d07082 Move federation rate limiting out of transport layer 2015-02-27 15:41:52 +00:00