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-rw-r--r--synapse/handlers/federation.py77
1 files changed, 51 insertions, 26 deletions
diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py
index 2ccdc3bfa7..38bebbf598 100644
--- a/synapse/handlers/federation.py
+++ b/synapse/handlers/federation.py
@@ -339,14 +339,26 @@ class FederationHandler(BaseHandler):
                             "[%s %s] Requesting state at missing prev_event %s",
                             room_id, event_id, p,
                         )
-                        state, got_auth_chain = (
-                            yield self.federation_client.get_state_for_room(
-                                origin, room_id, p,
+
+                        with logcontext.nested_logging_context(p):
+                            # note that if any of the missing prevs share missing state or
+                            # auth events, the requests to fetch those events are deduped
+                            # by the get_pdu_cache in federation_client.
+                            remote_state, got_auth_chain = (
+                                yield self.federation_client.get_state_for_room(
+                                    origin, room_id, p,
+                                )
                             )
-                        )
-                        auth_chains.update(got_auth_chain)
-                        state_group = {(x.type, x.state_key): x.event_id for x in state}
-                        state_groups.append(state_group)
+
+                            # XXX hrm I'm not convinced that duplicate events will compare
+                            # for equality, so I'm not sure this does what the author
+                            # hoped.
+                            auth_chains.update(got_auth_chain)
+
+                            state_group = {
+                                (x.type, x.state_key): x.event_id for x in remote_state
+                            }
+                            state_groups.append(state_group)
 
                     # Resolve any conflicting state
                     def fetch(ev_ids):
@@ -483,20 +495,21 @@ class FederationHandler(BaseHandler):
                 "[%s %s] Handling received prev_event %s",
                 room_id, event_id, ev.event_id,
             )
-            try:
-                yield self.on_receive_pdu(
-                    origin,
-                    ev,
-                    sent_to_us_directly=False,
-                )
-            except FederationError as e:
-                if e.code == 403:
-                    logger.warn(
-                        "[%s %s] Received prev_event %s failed history check.",
-                        room_id, event_id, ev.event_id,
+            with logcontext.nested_logging_context(ev.event_id):
+                try:
+                    yield self.on_receive_pdu(
+                        origin,
+                        ev,
+                        sent_to_us_directly=False,
                     )
-                else:
-                    raise
+                except FederationError as e:
+                    if e.code == 403:
+                        logger.warn(
+                            "[%s %s] Received prev_event %s failed history check.",
+                            room_id, event_id, ev.event_id,
+                        )
+                    else:
+                        raise
 
     @defer.inlineCallbacks
     def _process_received_pdu(self, origin, event, state, auth_chain):
@@ -572,6 +585,10 @@ class FederationHandler(BaseHandler):
                     })
                     seen_ids.add(e.event_id)
 
+                logger.info(
+                    "[%s %s] persisting newly-received auth/state events %s",
+                    room_id, event_id, [e["event"].event_id for e in event_infos]
+                )
                 yield self._handle_new_events(origin, event_infos)
 
             try:
@@ -1135,7 +1152,8 @@ class FederationHandler(BaseHandler):
             try:
                 logger.info("Processing queued PDU %s which was received "
                             "while we were joining %s", p.event_id, p.room_id)
-                yield self.on_receive_pdu(origin, p, sent_to_us_directly=True)
+                with logcontext.nested_logging_context(p.event_id):
+                    yield self.on_receive_pdu(origin, p, sent_to_us_directly=True)
             except Exception as e:
                 logger.warn(
                     "Error handling queued PDU %s from %s: %s",
@@ -1581,15 +1599,22 @@ class FederationHandler(BaseHandler):
 
         Notifies about the events where appropriate.
         """
-        contexts = yield logcontext.make_deferred_yieldable(defer.gatherResults(
-            [
-                logcontext.run_in_background(
-                    self._prep_event,
+
+        @defer.inlineCallbacks
+        def prep(ev_info):
+            event = ev_info["event"]
+            with logcontext.nested_logging_context(suffix=event.event_id):
+                res = yield self._prep_event(
                     origin,
-                    ev_info["event"],
+                    event,
                     state=ev_info.get("state"),
                     auth_events=ev_info.get("auth_events"),
                 )
+            defer.returnValue(res)
+
+        contexts = yield logcontext.make_deferred_yieldable(defer.gatherResults(
+            [
+                logcontext.run_in_background(prep, ev_info)
                 for ev_info in event_infos
             ], consumeErrors=True,
         ))