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Fix threadsafety in ThreadedMemoryReactorClock #8497
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This could, very occasionally, cause:
```
tests.test_visibility.FilterEventsForServerTestCase.test_large_room
===============================================================================
[ERROR]
Traceback (most recent call last):
File "/src/tests/rest/media/v1/test_media_storage.py", line 86, in test_ensure_media_is_in_local_cache
self.wait_on_thread(x)
File "/src/tests/unittest.py", line 296, in wait_on_thread
self.reactor.advance(0.01)
File "/src/.tox/py35/lib/python3.5/site-packages/twisted/internet/task.py", line 826, in advance
self._sortCalls()
File "/src/.tox/py35/lib/python3.5/site-packages/twisted/internet/task.py", line 787, in _sortCalls
self.calls.sort(key=lambda a: a.getTime())
builtins.ValueError: list modified during sort
tests.rest.media.v1.test_media_storage.MediaStorageTests.test_ensure_media_is_in_local_cache
```
| @@ -251,6 +253,7 @@ def __init__(self): | |||
| self._tcp_callbacks = {} | |||
| self._udp = [] | |||
| lookups = self.lookups = {} | |||
| self._thread_callbacks = deque() # type: Deque[Callable[[], None]]() | |||
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Are you using a deque simply for the performance benefits of popleft?
There was a problem hiding this comment.
I'm using it because I don't think a list is threadsafe.
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Doing some research it looks to be threadsafe in CPython, however using a deque is likely a safer bet.
tests/server.py
Outdated
Comment on lines
310
to
311
| # run any "callFromThread" callbacks before anything registered with | ||
| # "callLater" |
There was a problem hiding this comment.
What do you mean by "before anything registered with "callLater"?
There was a problem hiding this comment.
well, super().advance() runs callbacks that were registered with callLater. Perhaps I'll reword.
|
right, I think this is finally ready for review |
anoadragon453
approved these changes
Oct 9, 2020
Comment on lines
+311
to
+312
| # first advance our reactor's time, and run any "callLater" callbacks that | ||
| # makes ready |
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This is indeed easier to understand - though I'm not sure if "makes ready" is a typo.
There was a problem hiding this comment.
it's not a typo, though there may be better ways of expressing it.
Suppose our fake reactor thinks it is 12:00:00, and we have registered a callLater callback for 12:00:02. advance(5) means that the callback will now be "ready" to run: it was "made ready" by advancing the reactor.
| @@ -251,6 +253,7 @@ def __init__(self): | |||
| self._tcp_callbacks = {} | |||
| self._udp = [] | |||
| lookups = self.lookups = {} | |||
| self._thread_callbacks = deque() # type: Deque[Callable[[], None]]() | |||
There was a problem hiding this comment.
Doing some research it looks to be threadsafe in CPython, however using a deque is likely a safer bet.
Co-authored-by: Andrew Morgan <[email protected]>
erikjohnston
added a commit
that referenced
this pull request
Oct 22, 2020
Synapse 1.22.0rc1 (2020-10-22) ============================== Features -------- - Add a configuration option for always using the "userinfo endpoint" for OpenID Connect. This fixes support for some identity providers, e.g. GitLab. Contributed by Benjamin Koch. ([\#7658](#7658)) - Add ability for `ThirdPartyEventRules` modules to query and manipulate whether a room is in the public rooms directory. ([\#8292](#8292), [\#8467](#8467)) - Add support for olm fallback keys ([MSC2732](matrix-org/matrix-spec-proposals#2732)). ([\#8312](#8312), [\#8501](#8501)) - Add support for running background tasks in a separate worker process. ([\#8369](#8369), [\#8458](#8458), [\#8489](#8489), [\#8513](#8513), [\#8544](#8544), [\#8599](#8599)) - Add support for device dehydration ([MSC2697](matrix-org/matrix-spec-proposals#2697)). ([\#8380](#8380)) - Add support for [MSC2409](matrix-org/matrix-spec-proposals#2409), which allows sending typing, read receipts, and presence events to appservices. ([\#8437](#8437), [\#8590](#8590)) - Change default room version to "6", per [MSC2788](matrix-org/matrix-spec-proposals#2788). ([\#8461](#8461)) - Add the ability to send non-membership events into a room via the `ModuleApi`. ([\#8479](#8479)) - Increase default upload size limit from 10M to 50M. Contributed by @Akkowicz. ([\#8502](#8502)) - Add support for modifying event content in `ThirdPartyRules` modules. ([\#8535](#8535), [\#8564](#8564)) Bugfixes -------- - Fix a longstanding bug where invalid ignored users in account data could break clients. ([\#8454](#8454)) - Fix a bug where backfilling a room with an event that was missing the `redacts` field would break. ([\#8457](#8457)) - Don't attempt to respond to some requests if the client has already disconnected. ([\#8465](#8465)) - Fix message duplication if something goes wrong after persisting the event. ([\#8476](#8476)) - Fix incremental sync returning an incorrect `prev_batch` token in timeline section, which when used to paginate returned events that were included in the incremental sync. Broken since v0.16.0. ([\#8486](#8486)) - Expose the `uk.half-shot.msc2778.login.application_service` to clients from the login API. This feature was added in v1.21.0, but was not exposed as a potential login flow. ([\#8504](#8504)) - Fix error code for `/profile/{userId}/displayname` to be `M_BAD_JSON`. ([\#8517](#8517)) - Fix a bug introduced in v1.7.0 that could cause Synapse to insert values from non-state `m.room.retention` events into the `room_retention` database table. ([\#8527](#8527)) - Fix not sending events over federation when using sharded event writers. ([\#8536](#8536)) - Fix a long standing bug where email notifications for encrypted messages were blank. ([\#8545](#8545)) - Fix increase in the number of `There was no active span...` errors logged when using OpenTracing. ([\#8567](#8567)) - Fix a bug that prevented errors encountered during execution of the `synapse_port_db` from being correctly printed. ([\#8585](#8585)) - Fix appservice transactions to only include a maximum of 100 persistent and 100 ephemeral events. ([\#8606](#8606)) Updates to the Docker image --------------------------- - Added multi-arch support (arm64,arm/v7) for the docker images. Contributed by @maquis196. ([\#7921](#7921)) - Add support for passing commandline args to the synapse process. Contributed by @samuel-p. ([\#8390](#8390)) Improved Documentation ---------------------- - Update the directions for using the manhole with coroutines. ([\#8462](#8462)) - Improve readme by adding new shield.io badges. ([\#8493](#8493)) - Added note about docker in manhole.md regarding which ip address to bind to. Contributed by @maquis196. ([\#8526](#8526)) - Document the new behaviour of the `allowed_lifetime_min` and `allowed_lifetime_max` settings in the room retention configuration. ([\#8529](#8529)) Deprecations and Removals ------------------------- - Drop unused `device_max_stream_id` table. ([\#8589](#8589)) Internal Changes ---------------- - Check for unreachable code with mypy. ([\#8432](#8432)) - Add unit test for event persister sharding. ([\#8433](#8433)) - Allow events to be sent to clients sooner when using sharded event persisters. ([\#8439](#8439), [\#8488](#8488), [\#8496](#8496), [\#8499](#8499)) - Configure `public_baseurl` when using demo scripts. ([\#8443](#8443)) - Add SQL logging on queries that happen during startup. ([\#8448](#8448)) - Speed up unit tests when using PostgreSQL. ([\#8450](#8450)) - Remove redundant database loads of stream_ordering for events we already have. ([\#8452](#8452)) - Reduce inconsistencies between codepaths for membership and non-membership events. ([\#8463](#8463)) - Combine `SpamCheckerApi` with the more generic `ModuleApi`. ([\#8464](#8464)) - Additional testing for `ThirdPartyEventRules`. ([\#8468](#8468)) - Add `-d` option to `./scripts-dev/lint.sh` to lint files that have changed since the last git commit. ([\#8472](#8472)) - Unblacklist some sytests. ([\#8474](#8474)) - Include the log level in the phone home stats. ([\#8477](#8477)) - Remove outdated sphinx documentation, scripts and configuration. ([\#8480](#8480)) - Clarify error message when plugin config parsers raise an error. ([\#8492](#8492)) - Remove the deprecated `Handlers` object. ([\#8494](#8494)) - Fix a threadsafety bug in unit tests. ([\#8497](#8497)) - Add user agent to user_daily_visits table. ([\#8503](#8503)) - Add type hints to various parts of the code base. ([\#8407](#8407), [\#8505](#8505), [\#8507](#8507), [\#8547](#8547), [\#8562](#8562), [\#8609](#8609)) - Remove unused code from the test framework. ([\#8514](#8514)) - Apply some internal fixes to the `HomeServer` class to make its code more idiomatic and statically-verifiable. ([\#8515](#8515)) - Factor out common code between `RoomMemberHandler._locally_reject_invite` and `EventCreationHandler.create_event`. ([\#8537](#8537)) - Improve database performance by executing more queries without starting transactions. ([\#8542](#8542)) - Rename `Cache` to `DeferredCache`, to better reflect its purpose. ([\#8548](#8548)) - Move metric registration code down into `LruCache`. ([\#8561](#8561), [\#8591](#8591)) - Replace `DeferredCache` with the lighter-weight `LruCache` where possible. ([\#8563](#8563)) - Add virtualenv-generated folders to `.gitignore`. ([\#8566](#8566)) - Add `get_immediate` method to `DeferredCache`. ([\#8568](#8568)) - Fix mypy not properly checking across the codebase, additionally, fix a typing assertion error in `handlers/auth.py`. ([\#8569](#8569)) - Fix `synmark` benchmark runner. ([\#8571](#8571)) - Modify `DeferredCache.get()` to return `Deferred`s instead of `ObservableDeferred`s. ([\#8572](#8572)) - Adjust a protocol-type definition to fit `sqlite3` assertions. ([\#8577](#8577)) - Support macOS on the `synmark` benchmark runner. ([\#8578](#8578)) - Update `mypy` static type checker to 0.790. ([\#8583](#8583), [\#8600](#8600)) - Re-organize the structured logging code to separate the TCP transport handling from the JSON formatting. ([\#8587](#8587)) - Remove extraneous unittest logging decorators from unit tests. ([\#8592](#8592)) - Minor optimisations in caching code. ([\#8593](#8593), [\#8594](#8594))
netbsd-srcmastr
pushed a commit
to NetBSD/pkgsrc
that referenced
this pull request
Oct 30, 2020
Synapse 1.22.0 (2020-10-27) =========================== No significant changes. Synapse 1.22.0rc2 (2020-10-26) ============================== Bugfixes -------- - Fix bugs where ephemeral events were not sent to appservices. Broke in v1.22.0rc1. ([\#8648](matrix-org/synapse#8648), [\#8656](matrix-org/synapse#8656)) - Fix `user_daily_visits` table to not have duplicate rows per user/device due to multiple user agents. Broke in v1.22.0rc1. ([\#8654](matrix-org/synapse#8654)) Synapse 1.22.0rc1 (2020-10-22) ============================== Features -------- - Add a configuration option for always using the "userinfo endpoint" for OpenID Connect. This fixes support for some identity providers, e.g. GitLab. Contributed by Benjamin Koch. ([\#7658](matrix-org/synapse#7658)) - Add ability for `ThirdPartyEventRules` modules to query and manipulate whether a room is in the public rooms directory. ([\#8292](matrix-org/synapse#8292), [\#8467](matrix-org/synapse#8467)) - Add support for olm fallback keys ([MSC2732](matrix-org/matrix-spec-proposals#2732)). ([\#8312](matrix-org/synapse#8312), [\#8501](matrix-org/synapse#8501)) - Add support for running background tasks in a separate worker process. ([\#8369](matrix-org/synapse#8369), [\#8458](matrix-org/synapse#8458), [\#8489](matrix-org/synapse#8489), [\#8513](matrix-org/synapse#8513), [\#8544](matrix-org/synapse#8544), [\#8599](matrix-org/synapse#8599)) - Add support for device dehydration ([MSC2697](matrix-org/matrix-spec-proposals#2697)). ([\#8380](matrix-org/synapse#8380)) - Add support for [MSC2409](matrix-org/matrix-spec-proposals#2409), which allows sending typing, read receipts, and presence events to appservices. ([\#8437](matrix-org/synapse#8437), [\#8590](matrix-org/synapse#8590)) - Change default room version to "6", per [MSC2788](matrix-org/matrix-spec-proposals#2788). ([\#8461](matrix-org/synapse#8461)) - Add the ability to send non-membership events into a room via the `ModuleApi`. ([\#8479](matrix-org/synapse#8479)) - Increase default upload size limit from 10M to 50M. Contributed by @Akkowicz. ([\#8502](matrix-org/synapse#8502)) - Add support for modifying event content in `ThirdPartyRules` modules. ([\#8535](matrix-org/synapse#8535), [\#8564](matrix-org/synapse#8564)) Bugfixes -------- - Fix a longstanding bug where invalid ignored users in account data could break clients. ([\#8454](matrix-org/synapse#8454)) - Fix a bug where backfilling a room with an event that was missing the `redacts` field would break. ([\#8457](matrix-org/synapse#8457)) - Don't attempt to respond to some requests if the client has already disconnected. ([\#8465](matrix-org/synapse#8465)) - Fix message duplication if something goes wrong after persisting the event. ([\#8476](matrix-org/synapse#8476)) - Fix incremental sync returning an incorrect `prev_batch` token in timeline section, which when used to paginate returned events that were included in the incremental sync. Broken since v0.16.0. ([\#8486](matrix-org/synapse#8486)) - Expose the `uk.half-shot.msc2778.login.application_service` to clients from the login API. This feature was added in v1.21.0, but was not exposed as a potential login flow. ([\#8504](matrix-org/synapse#8504)) - Fix error code for `/profile/{userId}/displayname` to be `M_BAD_JSON`. ([\#8517](matrix-org/synapse#8517)) - Fix a bug introduced in v1.7.0 that could cause Synapse to insert values from non-state `m.room.retention` events into the `room_retention` database table. ([\#8527](matrix-org/synapse#8527)) - Fix not sending events over federation when using sharded event writers. ([\#8536](matrix-org/synapse#8536)) - Fix a long standing bug where email notifications for encrypted messages were blank. ([\#8545](matrix-org/synapse#8545)) - Fix increase in the number of `There was no active span...` errors logged when using OpenTracing. ([\#8567](matrix-org/synapse#8567)) - Fix a bug that prevented errors encountered during execution of the `synapse_port_db` from being correctly printed. ([\#8585](matrix-org/synapse#8585)) - Fix appservice transactions to only include a maximum of 100 persistent and 100 ephemeral events. ([\#8606](matrix-org/synapse#8606)) Updates to the Docker image --------------------------- - Added multi-arch support (arm64,arm/v7) for the docker images. Contributed by @maquis196. ([\#7921](matrix-org/synapse#7921)) - Add support for passing commandline args to the synapse process. Contributed by @samuel-p. ([\#8390](matrix-org/synapse#8390)) Improved Documentation ---------------------- - Update the directions for using the manhole with coroutines. ([\#8462](matrix-org/synapse#8462)) - Improve readme by adding new shield.io badges. ([\#8493](matrix-org/synapse#8493)) - Added note about docker in manhole.md regarding which ip address to bind to. Contributed by @maquis196. ([\#8526](matrix-org/synapse#8526)) - Document the new behaviour of the `allowed_lifetime_min` and `allowed_lifetime_max` settings in the room retention configuration. ([\#8529](matrix-org/synapse#8529)) Deprecations and Removals ------------------------- - Drop unused `device_max_stream_id` table. ([\#8589](matrix-org/synapse#8589)) Internal Changes ---------------- - Check for unreachable code with mypy. ([\#8432](matrix-org/synapse#8432)) - Add unit test for event persister sharding. ([\#8433](matrix-org/synapse#8433)) - Allow events to be sent to clients sooner when using sharded event persisters. ([\#8439](matrix-org/synapse#8439), [\#8488](matrix-org/synapse#8488), [\#8496](matrix-org/synapse#8496), [\#8499](matrix-org/synapse#8499)) - Configure `public_baseurl` when using demo scripts. ([\#8443](matrix-org/synapse#8443)) - Add SQL logging on queries that happen during startup. ([\#8448](matrix-org/synapse#8448)) - Speed up unit tests when using PostgreSQL. ([\#8450](matrix-org/synapse#8450)) - Remove redundant database loads of stream_ordering for events we already have. ([\#8452](matrix-org/synapse#8452)) - Reduce inconsistencies between codepaths for membership and non-membership events. ([\#8463](matrix-org/synapse#8463)) - Combine `SpamCheckerApi` with the more generic `ModuleApi`. ([\#8464](matrix-org/synapse#8464)) - Additional testing for `ThirdPartyEventRules`. ([\#8468](matrix-org/synapse#8468)) - Add `-d` option to `./scripts-dev/lint.sh` to lint files that have changed since the last git commit. ([\#8472](matrix-org/synapse#8472)) - Unblacklist some sytests. ([\#8474](matrix-org/synapse#8474)) - Include the log level in the phone home stats. ([\#8477](matrix-org/synapse#8477)) - Remove outdated sphinx documentation, scripts and configuration. ([\#8480](matrix-org/synapse#8480)) - Clarify error message when plugin config parsers raise an error. ([\#8492](matrix-org/synapse#8492)) - Remove the deprecated `Handlers` object. ([\#8494](matrix-org/synapse#8494)) - Fix a threadsafety bug in unit tests. ([\#8497](matrix-org/synapse#8497)) - Add user agent to user_daily_visits table. ([\#8503](matrix-org/synapse#8503)) - Add type hints to various parts of the code base. ([\#8407](matrix-org/synapse#8407), [\#8505](matrix-org/synapse#8505), [\#8507](matrix-org/synapse#8507), [\#8547](matrix-org/synapse#8547), [\#8562](matrix-org/synapse#8562), [\#8609](matrix-org/synapse#8609)) - Remove unused code from the test framework. ([\#8514](matrix-org/synapse#8514)) - Apply some internal fixes to the `HomeServer` class to make its code more idiomatic and statically-verifiable. ([\#8515](matrix-org/synapse#8515)) - Factor out common code between `RoomMemberHandler._locally_reject_invite` and `EventCreationHandler.create_event`. ([\#8537](matrix-org/synapse#8537)) - Improve database performance by executing more queries without starting transactions. ([\#8542](matrix-org/synapse#8542)) - Rename `Cache` to `DeferredCache`, to better reflect its purpose. ([\#8548](matrix-org/synapse#8548)) - Move metric registration code down into `LruCache`. ([\#8561](matrix-org/synapse#8561), [\#8591](matrix-org/synapse#8591)) - Replace `DeferredCache` with the lighter-weight `LruCache` where possible. ([\#8563](matrix-org/synapse#8563)) - Add virtualenv-generated folders to `.gitignore`. ([\#8566](matrix-org/synapse#8566)) - Add `get_immediate` method to `DeferredCache`. ([\#8568](matrix-org/synapse#8568)) - Fix mypy not properly checking across the codebase, additionally, fix a typing assertion error in `handlers/auth.py`. ([\#8569](matrix-org/synapse#8569)) - Fix `synmark` benchmark runner. ([\#8571](matrix-org/synapse#8571)) - Modify `DeferredCache.get()` to return `Deferred`s instead of `ObservableDeferred`s. ([\#8572](matrix-org/synapse#8572)) - Adjust a protocol-type definition to fit `sqlite3` assertions. ([\#8577](matrix-org/synapse#8577)) - Support macOS on the `synmark` benchmark runner. ([\#8578](matrix-org/synapse#8578)) - Update `mypy` static type checker to 0.790. ([\#8583](matrix-org/synapse#8583), [\#8600](matrix-org/synapse#8600)) - Re-organize the structured logging code to separate the TCP transport handling from the JSON formatting. ([\#8587](matrix-org/synapse#8587)) - Remove extraneous unittest logging decorators from unit tests. ([\#8592](matrix-org/synapse#8592)) - Minor optimisations in caching code. ([\#8593](matrix-org/synapse#8593), [\#8594](matrix-org/synapse#8594))
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