Synapse 1.78.0rc1 (2023-02-21)

Features

• Implement the experimental exact_event_match push rule condition from MSC3758. (#14964)
• Add account data to the command line user data export tool. (#14969)
• Implement MSC3873 to disambiguate push rule keys with dots in them. (#15004)
• Allow Synapse to use a specific Redis logical database in worker-mode deployments. (#15034)
• Tag opentracing spans for federation requests with the name of the worker serving the request. (#15042)
• Implement the experimental exact_event_property_contains push rule condition from MSC3966. (#15045)
• Remove spurious dont_notify action from the defaults for the .m.rule.reaction pushrule. (#15073)
• Update the error code returned when user sends a duplicate annotation. (#15075)

Bugfixes

• Prevent clients from reporting nonexistent events. (#13779)
• Return spec-compliant JSON errors when unknown endpoints are requested. (#14605)
• Fix a long-standing bug where the room aliases returned could be corrupted. (#15038)
• Fix a bug introduced in Synapse 1.76.0 where partially-joined rooms could not be deleted using the purge room API. (#15068)
• Fix a long-standing bug where federated joins would fail if the first server in the list of servers to try is not in the room. (#15074)
• Fix a bug introduced in Synapse v1.74.0 where searching with colons when using ICU for search term tokenisation would fail with an error. (#15079)
• Reduce the likelihood of a rare race condition where rejoining a restricted room over federation would fail. (#15080)
• Fix a bug introduced in Synapse 1.76 where workers would fail to start if the health listener was configured. (#15096)
• Fix a bug introduced in Synapse 1.75 where the portdb script would fail to run after a room had been faster-joined. (#15108)

Improved Documentation

• Document how to start Synapse with Poetry. Contributed by @thezaidbintariq. (#14892, #15022)
• Update delegation documentation to clarify that SRV DNS delegation does not eliminate all needs to serve files from .well-known locations. Contributed by @williamkray. (#14959)
• Fix a mistake in registration_shared_secret_path docs. (#15078)
• Refer to a more recent blog post on the Database Maintenance Tools page. Contributed by @jahway603. (#15083)

Internal Changes

• Re-type hint some collections as read-only. (#13755)
• Faster joins: don't stall when another user joins during a partial-state room resync. (#14606)
• Add a class UnpersistedEventContext to allow for the batching up of storing state groups. (#14675)
• Add a check to ensure that locked dependencies have source distributions available. (#14742)
• Tweak comment on _is_local_room_accessible as part of room visibility in /hierarchy to clarify the condition for a room being visible. (#14834)
• Prevent WARNING: there is already a transaction in progress lines appearing in PostgreSQL's logs on some occasions. (#14840)
• Use StrCollection to avoid potential bugs with Collection[str]. (#14929)
• Improve performance of /sync in a few situations. (#14973)
• Limit concurrent event creation for a room to avoid state resolution when sending bursts of events to a local room. (#14977)
• Skip calculating unread push actions in /sync when enable_push is false. (#14980)
• Add a schema dump symlinks inside contrib, to make it easier for IDEs to interrogate Synapse's database schema. (#14982)
• Improve type hints. (#15008, #15026, #15027, #15028, #15031, #15035, #15052, #15072, #15084)
• Update MSC3952 support based on changes to the MSC. (#15037)
• Avoid mutating a cached value in get_user_devices_from_cache. (#15040)
• Fix a rare exception in logs on start up. (#15041)
• Update pyo3-log to v0.8.1. (#15043)
• Avoid mutating cached values in _generate_sync_entry_for_account_data. (#15047)
• Refactor arguments of try_unbind_threepid and _try_unbind_threepid_with_id_server to not use dictionaries. (#15053)
• Merge debug logging from the hotfixes branch. (#15054)
• Faster joins: omit device list updates originating from partial state rooms in /sync responses without lazy loading of members enabled. (#15069)
• Fix clashing database transaction name. (#15070)
• Upper-bound frozendict dependency. This works around us being unable to test installing our wheels against Python 3.11 in CI. (#15114)
• Tweak logging for when a worker waits for its view of a replication stream to catch up. (#15120)