diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py
index 65f6041b10..a6d391c4e8 100644
--- a/synapse/handlers/federation.py
+++ b/synapse/handlers/federation.py
@@ -21,8 +21,8 @@ import logging
import sys
import six
-from six import iteritems
-from six.moves import http_client
+from six import iteritems, itervalues
+from six.moves import http_client, zip
from signedjson.key import decode_verify_key_bytes
from signedjson.sign import verify_signed_json
@@ -731,7 +731,7 @@ class FederationHandler(BaseHandler):
"""
joined_users = [
(state_key, int(event.depth))
- for (e_type, state_key), event in state.iteritems()
+ for (e_type, state_key), event in iteritems(state)
if e_type == EventTypes.Member
and event.membership == Membership.JOIN
]
@@ -748,7 +748,7 @@ class FederationHandler(BaseHandler):
except Exception:
pass
- return sorted(joined_domains.iteritems(), key=lambda d: d[1])
+ return sorted(joined_domains.items(), key=lambda d: d[1])
curr_domains = get_domains_from_state(curr_state)
@@ -811,7 +811,7 @@ class FederationHandler(BaseHandler):
tried_domains = set(likely_domains)
tried_domains.add(self.server_name)
- event_ids = list(extremities.iterkeys())
+ event_ids = list(extremities.keys())
logger.debug("calling resolve_state_groups in _maybe_backfill")
resolve = logcontext.preserve_fn(
@@ -827,15 +827,15 @@ class FederationHandler(BaseHandler):
states = dict(zip(event_ids, [s.state for s in states]))
state_map = yield self.store.get_events(
- [e_id for ids in states.itervalues() for e_id in ids.itervalues()],
+ [e_id for ids in itervalues(states) for e_id in itervalues(ids)],
get_prev_content=False
)
states = {
key: {
k: state_map[e_id]
- for k, e_id in state_dict.iteritems()
+ for k, e_id in iteritems(state_dict)
if e_id in state_map
- } for key, state_dict in states.iteritems()
+ } for key, state_dict in iteritems(states)
}
for e_id, _ in sorted_extremeties_tuple:
@@ -1515,7 +1515,7 @@ class FederationHandler(BaseHandler):
yield self.store.persist_events(
[
(ev_info["event"], context)
- for ev_info, context in itertools.izip(event_infos, contexts)
+ for ev_info, context in zip(event_infos, contexts)
],
backfilled=backfilled,
)
diff --git a/synapse/handlers/message.py b/synapse/handlers/message.py
index ba3c4642bc..7030d8beab 100644
--- a/synapse/handlers/message.py
+++ b/synapse/handlers/message.py
@@ -32,7 +32,7 @@ from synapse.events.utils import serialize_event
from synapse.events.validator import EventValidator
from synapse.replication.http.send_event import send_event_to_master
from synapse.types import RoomAlias, UserID
-from synapse.util.async import Limiter
+from synapse.util.async import Linearizer
from synapse.util.frozenutils import frozendict_json_encoder
from synapse.util.logcontext import run_in_background
from synapse.util.metrics import measure_func
@@ -180,7 +180,7 @@ class EventCreationHandler(object):
# We arbitrarily limit concurrent event creation for a room to 5.
# This is to stop us from diverging history *too* much.
- self.limiter = Limiter(max_count=5)
+ self.limiter = Linearizer(max_count=5, name="room_event_creation_limit")
self.action_generator = hs.get_action_generator()
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