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-rw-r--r--synapse/handlers/federation.py41
1 files changed, 26 insertions, 15 deletions
diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py
index 52be5a402d..2af9849ed0 100644
--- a/synapse/handlers/federation.py
+++ b/synapse/handlers/federation.py
@@ -172,8 +172,22 @@ class FederationHandler(BaseHandler):
                             origin, pdu, prevs, min_depth
                         )
 
-            prevs = {e_id for e_id, _ in pdu.prev_events}
-            seen = set(have_seen.keys())
+                        # Update the set of things we've seen after trying to
+                        # fetch the missing stuff
+                        have_seen = yield self.store.have_events(prevs)
+                        seen = set(have_seen.iterkeys())
+
+                        if not prevs - seen:
+                            logger.info(
+                                "Found all missing prev events for %s", pdu.event_id
+                            )
+                elif prevs - seen:
+                    logger.info(
+                        "Not fetching %d missing events for room %r,event %s: %r...",
+                        len(prevs - seen), pdu.room_id, pdu.event_id,
+                        list(prevs - seen)[:5],
+                    )
+
             if prevs - seen:
                 logger.info(
                     "Still missing %d events for room %r: %r...",
@@ -208,19 +222,15 @@ class FederationHandler(BaseHandler):
         Args:
             origin (str): Origin of the pdu. Will be called to get the missing events
             pdu: received pdu
-            prevs (str[]): List of event ids which we are missing
+            prevs (set(str)): List of event ids which we are missing
             min_depth (int): Minimum depth of events to return.
-
-        Returns:
-            Deferred<dict(str, str?)>: updated have_seen dictionary
         """
         # We recalculate seen, since it may have changed.
         have_seen = yield self.store.have_events(prevs)
         seen = set(have_seen.keys())
 
         if not prevs - seen:
-            # nothing left to do
-            defer.returnValue(have_seen)
+            return
 
         latest = yield self.store.get_latest_event_ids_in_room(
             pdu.room_id
@@ -232,8 +242,8 @@ class FederationHandler(BaseHandler):
         latest |= seen
 
         logger.info(
-            "Missing %d events for room %r: %r...",
-            len(prevs - seen), pdu.room_id, list(prevs - seen)[:5]
+            "Missing %d events for room %r pdu %s: %r...",
+            len(prevs - seen), pdu.room_id, pdu.event_id, list(prevs - seen)[:5]
         )
 
         # XXX: we set timeout to 10s to help workaround
@@ -265,22 +275,23 @@ class FederationHandler(BaseHandler):
             timeout=10000,
         )
 
+        logger.info(
+            "Got %d events: %r...",
+            len(missing_events), [e.event_id for e in missing_events[:5]]
+        )
+
         # We want to sort these by depth so we process them and
         # tell clients about them in order.
         missing_events.sort(key=lambda x: x.depth)
 
         for e in missing_events:
+            logger.info("Handling found event %s", e.event_id)
             yield self.on_receive_pdu(
                 origin,
                 e,
                 get_missing=False
             )
 
-        have_seen = yield self.store.have_events(
-            [ev for ev, _ in pdu.prev_events]
-        )
-        defer.returnValue(have_seen)
-
     @log_function
     @defer.inlineCallbacks
     def _process_received_pdu(self, origin, pdu, state, auth_chain):