Currently, we will try to start a new partial state sync every time we
perform a remote join, which is undesirable if there is already one
running for a given room.
We intend to perform remote joins whenever additional local users wish
to join a partial state room, so let's ensure that we do not start more
than one concurrent partial state sync for any given room.
------------------------------------------------------------------------
There is a race condition where the homeserver leaves a room and later
rejoins while the partial state sync from the previous membership is
still running. There is no guarantee that the previous partial state
sync will process the latest join, so we restart it if needed.
Signed-off-by: Sean Quah <seanq@matrix.org>
* Change Documentation to have v10 as default room version
* Change Default Room version to 10
* Add changelog entry for default room version swap
* Add changelog entry for v10 default room version in docs
* Clarify doc changelog entry
Co-authored-by: David Robertson <david.m.robertson1@gmail.com>
* Improve Documentation changes.
Co-authored-by: David Robertson <david.m.robertson1@gmail.com>
* Update Changelog entry to have correct format
Co-authored-by: David Robertson <david.m.robertson1@gmail.com>
* Update Spec Version to 1.5
* Only need 1 changelog.
* Fix test.
* Update "Changed in" line
Co-authored-by: David Robertson <david.m.robertson1@gmail.com>
Co-authored-by: Patrick Cloke <clokep@users.noreply.github.com>
Co-authored-by: Patrick Cloke <patrickc@matrix.org>
Serving partial join responses is no longer experimental. They will only be served under the stable identifier if the the undocumented config flag experimental.msc3706_enabled is set to true.
Synapse continues to request a partial join only if the undocumented config flag experimental.faster_joins is set to true; this setting remains present and unaffected.
We were incorrectly checking if the *local* token had been advanced, rather than the token for the remote instance.
In practice, I don't think this has caused any bugs due to where we use `wait_for_stream_position`, as critically we don't use it on instances that also write to the given streams (and so the local token will lag behind all remote tokens).
When the local homeserver is already joined to a room and wants to
perform another remote join, we may find it useful to do a non-partial
state join if we already have the full state for the room.
Signed-off-by: Sean Quah <seanq@matrix.org>
* Also use stable name in SendJoinResponse struct
follow-up to #14832
* Changelog
* Fix a rename I missed
* Run black
* Update synapse/federation/federation_client.py
Co-authored-by: Sean Quah <8349537+squahtx@users.noreply.github.com>
Co-authored-by: Sean Quah <8349537+squahtx@users.noreply.github.com>
* Use new query param when requesting a partial join
* Read new query param when serving partial join
* Provide new field names when serving partial joins
* Read new field names from partial join response
* Changelog
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>
Two parts to this:
* Bundle the whole of the replacement with any edited events. This is backwards-compatible so I haven't put it behind a flag.
* Optionally, inhibit server-side replacement of edited events. This has scope to break things, so it is currently disabled by default.
It doesn't seem valid that HTML entities should appear in
the title field of oEmbed responses, but a popular WordPress
plug-in seems to do it.
There should not be harm in unescaping these.
This has two related changes:
* It enables fast-path processing for an empty filter (`[]`) which was
previously only used for wildcard not-filters (`["*"]`).
* It special cases a `/sync` filter with no-rooms to skip all room
processing, previously we would partially skip processing, but would
generally still calculate intermediate values for each room which were
then unused.
Future changes might consider further optimizations:
* Skip calculating per-room account data when all rooms are filtered (currently
this is thrown away).
* Make similar improvements to other endpoints which support filters.
* Fixes#12277 :Disable sending confirmation email when 3pid is disabled
* Fix test_add_email_if_disabled test case to reflect changes to enable_3pid_changes flag
* Add changelog file
* Rename newsfragment.
Co-authored-by: Patrick Cloke <clokep@users.noreply.github.com>
PKCE can protect against certain attacks and is enabled by default. Support
can be controlled manually by setting the pkce_method of each oidc_providers
entry to 'auto' (default), 'always', or 'never'.
This is required by Twitter OAuth 2.0 support.
OpenID specifies the format of the user info endpoint and some
OAuth 2.0 IdPs do not follow it, e.g. NextCloud and Twitter.
This adds subject_template and picture_template options to the
default mapping provider for more flexibility in matching those user
info responses.
This creates a new store method, `process_replication_position` that
is called after `process_replication_rows`. By moving stream ID advances
here this guarantees any relevant cache invalidations will have been
applied before the stream is advanced.
This avoids race conditions where Python switches between threads mid
way through processing the `process_replication_rows` method where stream
IDs may be advanced before caches are invalidated due to class resolution
ordering.
See this comment/issue for further discussion:
https://github.com/matrix-org/synapse/issues/14158#issuecomment-1344048703
Then adapts calling code to retry when needed so it doesn't 500
to clients.
Signed-off-by: Mathieu Velten <mathieuv@matrix.org>
Co-authored-by: Sean Quah <8349537+squahtx@users.noreply.github.com>
if a Synapse deployment upgraded (from < 1.62.0 to >= 1.70.0) then it
is possible for schema deltas to run before background updates causing
drift in the database schema due to:
1. A delta registered a background update to create an index.
2. A delta dropped the above index if it exists (but it yet exist won't since
the background job hasn't run).
3. The code assumed the index was dropped.
To fix this we:
1. Cancel the background update which could create the index.
2. Drop the index again.
3. Drop a related index which is dropped by the background update.
