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Fix incorrect truncation in get_missing_events

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It's quite important that get_missing_events returns the *latest* events in the
room; however we were pulling event ids out of the database until we got *at
least* 10, and then taking the *earliest* of the results.

We also shouldn't really be relying on depth, and should be checking the
room_id.
This commit is contained in:
Richard van der Hoff 2018-10-16 20:37:16 +01:00
parent b8a5b0097c
commit fc0f13dd03
5 changed files with 26 additions and 35 deletions
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12
synapse/handlers/federation.py
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@ -309,8 +309,8 @@ class FederationHandler(BaseHandler):
if sent_to_us_directly:
logger.warn(
"[%s %s] Failed to fetch %d prev events: rejecting",
room_id, event_id, len(prevs - seen),
"[%s %s] Rejecting: failed to fetch %d prev events: %s",
room_id, event_id, len(prevs - seen), shortstr(prevs - seen)
)
raise FederationError(
"ERROR",
@ -452,8 +452,8 @@ class FederationHandler(BaseHandler):
latest |= seen
logger.info(
"[%s %s]: Requesting %d prev_events: %s",
room_id, event_id, len(prevs - seen), shortstr(prevs - seen)
"[%s %s]: Requesting missing events between %s and %s",
room_id, event_id, shortstr(latest), event_id,
)
# XXX: we set timeout to 10s to help workaround
@ -1852,7 +1852,7 @@ class FederationHandler(BaseHandler):
@defer.inlineCallbacks
def on_get_missing_events(self, origin, room_id, earliest_events,
latest_events, limit, min_depth):
latest_events, limit):
in_room = yield self.auth.check_host_in_room(
room_id,
origin
@ -1861,14 +1861,12 @@ class FederationHandler(BaseHandler):
raise AuthError(403, "Host not in room.")
limit = min(limit, 20)
min_depth = max(min_depth, 0)
missing_events = yield self.store.get_missing_events(
room_id=room_id,
earliest_events=earliest_events,
latest_events=latest_events,
limit=limit,
min_depth=min_depth,
)
missing_events = yield filter_events_for_server(