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Reinstate linearizer for federation_server.on_context_state_request

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Richard van der Hoff 2018-04-20 11:10:04 +01:00
parent 60f6014bb7
commit 0c280d4d99
1 changed files with 11 additions and 5 deletions
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6
synapse/federation/federation_server.py
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@ -211,6 +211,12 @@ class FederationServer(FederationBase):
if not in_room:
raise AuthError(403, "Host not in room.")
# we grab the linearizer to protect ourselves from servers which hammer
# us. In theory we might already have the response to this query
# in the cache so we could return it without waiting for the linearizer
# - but that's non-trivial to get right, and anyway somewhat defeats
# the point of the linearizer.
with (yield self._server_linearizer.queue((origin, room_id))):
resp = yield self._state_resp_cache.wrap(
(room_id, event_id),
self._on_context_state_request_compute,