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Fix infinite loop in presence handler

Fixes #5102
This commit is contained in:
Richard van der Hoff 2019-04-26 11:13:16 +01:00
parent ce6d47934b
commit bd0d45ca69
3 changed files with 24 additions and 0 deletions

1
changelog.d/5103.bugfix Normal file
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@ -0,0 +1 @@
Fix bug where presence updates were sent to all servers in a room when a new server joined, rather than to just the new server.

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@ -828,6 +828,11 @@ class PresenceHandler(object):
if typ != EventTypes.Member:
continue
if event_id is None:
# state has been deleted, so this is not a join. We only care about
# joins.
continue
event = yield self.store.get_event(event_id)
if event.content.get("membership") != Membership.JOIN:
# We only care about joins

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@ -22,6 +22,24 @@ logger = logging.getLogger(__name__)
class StateDeltasStore(SQLBaseStore):
def get_current_state_deltas(self, prev_stream_id):
"""Fetch a list of room state changes since the given stream id
Each entry in the result contains the following fields:
- stream_id (int)
- room_id (str)
- type (str): event type
- state_key (str):
- event_id (str|None): new event_id for this state key. None if the
state has been deleted.
- prev_event_id (str|None): previous event_id for this state key. None
if it's new state.
Args:
prev_stream_id (int): point to get changes since (exclusive)
Returns:
Deferred[list[dict]]: results
"""
prev_stream_id = int(prev_stream_id)
if not self._curr_state_delta_stream_cache.has_any_entity_changed(
prev_stream_id