diff --git a/synapse/handlers/room_member.py b/synapse/handlers/room_member.py
index cb5a29bc7e..bea028b2bf 100644
--- a/synapse/handlers/room_member.py
+++ b/synapse/handlers/room_member.py
@@ -65,6 +65,7 @@ class RoomMemberHandler(metaclass=abc.ABCMeta):
self.event_creation_handler = hs.get_event_creation_handler()
self.member_linearizer = Linearizer(name="member")
+ self.member_limiter = Linearizer(max_count=10, name="member_as_limiter")
self.clock = hs.get_clock()
self.spam_checker = hs.get_spam_checker()
@@ -305,19 +306,38 @@ class RoomMemberHandler(metaclass=abc.ABCMeta):
key = (room_id,)
- with (await self.member_linearizer.queue(key)):
- result = await self.update_membership_locked(
- requester,
- target,
- room_id,
- action,
- txn_id=txn_id,
- remote_room_hosts=remote_room_hosts,
- third_party_signed=third_party_signed,
- ratelimit=ratelimit,
- content=content,
- require_consent=require_consent,
- )
+ as_id = object()
+ if requester.app_service:
+ as_id = requester.app_service.id
+
+ then = self.clock.time_msec()
+
+ with (await self.member_limiter.queue(as_id)):
+ diff = self.clock.time_msec() - then
+
+ if diff > 80 * 1000:
+ # haproxy would have timed the request out anyway...
+ raise SynapseError(504, "took to long to process")
+
+ with (await self.member_linearizer.queue(key)):
+ diff = self.clock.time_msec() - then
+
+ if diff > 80 * 1000:
+ # haproxy would have timed the request out anyway...
+ raise SynapseError(504, "took to long to process")
+
+ result = await self.update_membership_locked(
+ requester,
+ target,
+ room_id,
+ action,
+ txn_id=txn_id,
+ remote_room_hosts=remote_room_hosts,
+ third_party_signed=third_party_signed,
+ ratelimit=ratelimit,
+ content=content,
+ require_consent=require_consent,
+ )
return result
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