Matrix-Mirrors/anonymousland-synapse
1
0
Fork 0
mirror of https://git.anonymousland.org/anonymousland/synapse.git synced 2024-10-01 11:49:51 -04:00
Code Issues Packages Projects Releases Wiki Activity

Fix race when persisting create event (#4404)

Browse Source 
* Fix race when persisting create event

When persisting a chunk of DAG it is sometimes requried to do a state
resolution, which requires knowledge of the room version. If this
happens while we're persisting the create event then we need to use that
event rather than attempting to look it up in the database.
This commit is contained in:
Erik Johnston 2019-01-18 12:17:04 +00:00 committed by Amber Brown
parent 71b94eac46
commit 25dd56ace3
2 changed files with 13 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
changelog.d/4404.bugfix Normal file
View File

@ -0,0 +1 @@
Fix potential bug where creating or joining a room could fail

13
synapse/storage/events.py
View File

@ -739,7 +739,18 @@ class EventsStore(StateGroupWorkerStore, EventFederationStore, EventsWorkerStore
}
events_map = {ev.event_id: ev for ev, _ in events_context}
room_version = yield self.get_room_version(room_id)
# We need to get the room version, which is in the create event.
# Normally that'd be in the database, but its also possible that we're
# currently trying to persist it.
room_version = None
for ev, _ in events_context:
if ev.type == EventTypes.Create and ev.state_key == "":
room_version = ev.content.get("room_version", "1")
break
if not room_version:
room_version = yield self.get_room_version(room_id)
logger.debug("calling resolve_state_groups from preserve_events")
res = yield self._state_resolution_handler.resolve_state_groups(