From b92e7955be10209fdd13cdb799b1ac55c981d086 Mon Sep 17 00:00:00 2001 From: Erik Johnston Date: Thu, 7 Jul 2016 11:42:15 +0100 Subject: [PATCH] Comment --- synapse/storage/events.py | 3 +++ 1 file changed, 3 insertions(+) diff --git a/synapse/storage/events.py b/synapse/storage/events.py index c2136f3fd1..b582942164 100644 --- a/synapse/storage/events.py +++ b/synapse/storage/events.py @@ -1325,6 +1325,9 @@ class EventsStore(SQLBaseStore): max_depth = max(row[0] for row in rows) if max_depth <= topological_ordering: + # We need to ensure we don't delete all the events from the datanase + # otherwise we wouldn't be able to send any events (due to not + # having any backwards extremeties) raise SynapseError( 400, "topological_ordering is greater than forward extremeties" )