3 files changed, 28 insertions, 14 deletions
diff --git a/synapse/appservice/scheduler.py b/synapse/appservice/scheduler.py
index 2430814796..685f15c061 100644
--- a/synapse/appservice/scheduler.py
+++ b/synapse/appservice/scheduler.py
@@ -53,8 +53,8 @@ import logging
 from twisted.internet import defer
 
 from synapse.appservice import ApplicationServiceState
+from synapse.metrics.background_process_metrics import run_as_background_process
 from synapse.util.logcontext import run_in_background
-from synapse.util.metrics import Measure
 
 logger = logging.getLogger(__name__)
 
@@ -104,27 +104,34 @@ class _ServiceQueuer(object):
         self.clock = clock
 
     def enqueue(self, service, event):
-        # if this service isn't being sent something
         self.queued_events.setdefault(service.id, []).append(event)
-        run_in_background(self._send_request, service)
 
-    @defer.inlineCallbacks
-    def _send_request(self, service):
+        # start a sender for this appservice if we don't already have one
+
         if service.id in self.requests_in_flight:
             return
 
+        run_as_background_process(
+            "as-sender-%s" % (service.id, ),
+            self._send_request, service,
+        )
+
+    @defer.inlineCallbacks
+    def _send_request(self, service):
+        # sanity-check: we shouldn't get here if this service already has a sender
+        # running.
+        assert(service.id not in self.requests_in_flight)
+
         self.requests_in_flight.add(service.id)
         try:
             while True:
                 events = self.queued_events.pop(service.id, [])
                 if not events:
                     return
-
-                with Measure(self.clock, "servicequeuer.send"):
-                    try:
-                        yield self.txn_ctrl.send(service, events)
-                    except Exception:
-                        logger.exception("AS request failed")
+                try:
+                    yield self.txn_ctrl.send(service, events)
+                except Exception:
+                    logger.exception("AS request failed")
         finally:
             self.requests_in_flight.discard(service.id)
 
@@ -223,7 +230,12 @@ class _Recoverer(object):
         self.backoff_counter = 1
 
     def recover(self):
-        self.clock.call_later((2 ** self.backoff_counter), self.retry)
+        def _retry():
+            run_as_background_process(
+                "as-recoverer-%s" % (self.service.id,),
+                self.retry,
+            )
+        self.clock.call_later((2 ** self.backoff_counter), _retry)
 
     def _backoff(self):
         # cap the backoff to be around 8.5min => (2^9) = 512 secs
diff --git a/synapse/rest/client/v1/pusher.py b/synapse/rest/client/v1/pusher.py
index b84f0260f2..4c07ae7f45 100644
--- a/synapse/rest/client/v1/pusher.py
+++ b/synapse/rest/client/v1/pusher.py
@@ -142,7 +142,7 @@ class PushersRemoveRestServlet(RestServlet):
     To allow pusher to be delete by clicking a link (ie. GET request)
     """
     PATTERNS = client_path_patterns("/pushers/remove$")
-    SUCCESS_HTML = "<html><body>You have been unsubscribed</body><html>"
+    SUCCESS_HTML = b"<html><body>You have been unsubscribed</body><html>"
 
     def __init__(self, hs):
         super(PushersRemoveRestServlet, self).__init__()
diff --git a/synapse/state/v1.py b/synapse/state/v1.py
index 70a981f4a2..19e091ce3b 100644
--- a/synapse/state/v1.py
+++ b/synapse/state/v1.py
@@ -298,6 +298,8 @@ def _resolve_normal_events(events, auth_events):
 
 def _ordered_events(events):
     def key_func(e):
-        return -int(e.depth), hashlib.sha1(e.event_id.encode('ascii')).hexdigest()
+        # we have to use utf-8 rather than ascii here because it turns out we allow
+        # people to send us events with non-ascii event IDs :/
+        return -int(e.depth), hashlib.sha1(e.event_id.encode('utf-8')).hexdigest()
 
     return sorted(events, key=key_func)