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Merge pull request #3603 from matrix-org/erikj/handle_outliers

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Correctly handle outliers during persist events
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Erik Johnston 2018-07-25 13:24:04 +01:00 committed by GitHub
commit 3849f7f69f
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2 changed files with 9 additions and 6 deletions
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1
changelog.d/3601.bugfix Normal file
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@ -0,0 +1 @@
Fix failure to persist events over federation under load

14
synapse/storage/events.py
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@ -574,11 +574,13 @@ class EventsStore(EventsWorkerStore):
for ev, ctx in events_context:
if ctx.state_group is None:
# I don't think this can happen, but let's double-check
raise Exception(
"Context for new extremity event %s has no state "
"group" % (ev.event_id, ),
)
# This should only happen for outlier events.
if not ev.internal_metadata.is_outlier():
raise Exception(
"Context for new event %s has no state "
"group" % (ev.event_id, ),
)
continue
if ctx.state_group in state_groups_map:
continue
@ -606,7 +608,7 @@ class EventsStore(EventsWorkerStore):
for event_id in new_latest_event_ids:
# First search in the list of new events we're adding.
for ev, ctx in events_context:
if event_id == ev.event_id:
if event_id == ev.event_id and ctx.state_group is not None:
event_id_to_state_group[event_id] = ctx.state_group
break
else: