slots use less memory (and attribute access is faster) while slightly
limiting the flexibility of the class attributes. This focuses on objects
which are instantiated "often" and for short periods of time.
==============================
Bugfixes
--------
- Fix a bug introduced in v1.20.0rc1 where the wrong exception was raised when invalid JSON data is encountered. ([\#8291](https://github.com/matrix-org/synapse/issues/8291))
-----BEGIN PGP SIGNATURE-----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=e2T1
-----END PGP SIGNATURE-----
Merge tag 'v1.20.0rc3' into develop
Synapse 1.20.0rc3 (2020-09-11)
==============================
Bugfixes
--------
- Fix a bug introduced in v1.20.0rc1 where the wrong exception was raised when invalid JSON data is encountered. ([\#8291](https://github.com/matrix-org/synapse/issues/8291))
By importing from canonicaljson the simplejson module was still being used
in some situations. After this change the std lib json is consistenty used
throughout Synapse.
This has long been something I've wanted to do. Basically the `Daemonize` code
is both too flexible and not flexible enough, in that it offers a bunch of
features that we don't use (changing UID, closing FDs in the child, logging to
syslog) and doesn't offer a bunch that we could do with (redirecting stdout/err
to a file instead of /dev/null; having the parent not exit until the child is
running).
As a first step, I've lifted the Daemonize code and removed the bits we don't
use. This should be a non-functional change. Fixing everything else will come
later.
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.
First some background: StreamChangeCache is used to keep track of what "entities" have
changed since a given stream ID. So for example, we might use it to keep track of when the last
to-device message for a given user was received [1], and hence whether we need to pull any to-device messages from the database on a sync [2].
Now, it turns out that StreamChangeCache didn't support more than one thing being changed at
a given stream_id (this was part of the problem with #7206). However, it's entirely valid to send
to-device messages to more than one user at a time.
As it turns out, this did in fact work, because *some* methods of StreamChangeCache coped
ok with having multiple things changing on the same stream ID, and it seems we never actually
use the methods which don't work on the stream change caches where we allow multiple
changes at the same stream ID. But that feels horribly fragile, hence: let's update
StreamChangeCache to properly support this, and add some typing and some more tests while
we're at it.
[1]: https://github.com/matrix-org/synapse/blob/release-v1.12.3/synapse/storage/data_stores/main/deviceinbox.py#L301
[2]: https://github.com/matrix-org/synapse/blob/release-v1.12.3/synapse/storage/data_stores/main/deviceinbox.py#L47-L51
Other parts of the code (such as the StreamChangeCache) assume that there will
not be multiple changes with the same stream id.
This code was introduced in #7024, and I hope this fixes#7206.
* Pull Sentinel out of LoggingContext
... and drop a few unnecessary references to it
* Factor out LoggingContext.current_context
move `current_context` and `set_context` out to top-level functions.
Mostly this means that I can more easily trace what's actually referring to
LoggingContext, but I think it's generally neater.
* move copy-to-parent into `stop`
this really just makes `start` and `stop` more symetric. It also means that it
behaves correctly if you manually `set_log_context` rather than using the
context manager.
* Replace `LoggingContext.alive` with `finished`
Turn `alive` into `finished` and make it a bit better defined.
A lot of the things we log at INFO are now a bit superfluous, so lets
make them DEBUG logs to reduce the amount we log by default.
Co-Authored-By: Brendan Abolivier <babolivier@matrix.org>
Co-authored-by: Brendan Abolivier <github@brendanabolivier.com>
