Merge pull request #1012 from matrix-org/erikj/limit_backfill_uri

Limit number of extremeties in backfill request
This commit is contained in:
Erik Johnston 2016-08-16 12:55:42 +01:00 committed by GitHub
commit 7c6f4f9427

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@ -274,7 +274,7 @@ class FederationHandler(BaseHandler):
@log_function
@defer.inlineCallbacks
def backfill(self, dest, room_id, limit, extremities=[]):
def backfill(self, dest, room_id, limit, extremities):
""" Trigger a backfill request to `dest` for the given `room_id`
This will attempt to get more events from the remote. This may return
@ -284,9 +284,6 @@ class FederationHandler(BaseHandler):
if dest == self.server_name:
raise SynapseError(400, "Can't backfill from self.")
if not extremities:
extremities = yield self.store.get_oldest_events_in_room(room_id)
events = yield self.replication_layer.backfill(
dest,
room_id,
@ -455,6 +452,10 @@ class FederationHandler(BaseHandler):
)
max_depth = sorted_extremeties_tuple[0][1]
# We don't want to specify too many extremities as it causes the backfill
# request URI to be too long.
extremities = dict(sorted_extremeties_tuple[:5])
if current_depth > max_depth:
logger.debug(
"Not backfilling as we don't need to. %d < %d",