Fix typing replication not being handled on master (#7959)

Handling of incoming typing stream updates from replication was not
hooked up on master, effecting set ups where typing was handled on a
different worker.

This is really only a problem if the master process is also handling
sync requests, which is unlikely for those that are at the stage of
moving typing off.

The other observable effect is that if a worker restarts or a
replication connect drops then the typing worker will issue a
`POSITION typing`, triggering master process to try and stream *all*
typing updates from position 0.

Fixes #7907

1 files changed, 8 insertions, 0 deletions

diff --git a/synapse/replication/tcp/client.py b/synapse/replication/tcp/client.py
index 4985e40b1f..fcf8ebf1e7 100644
--- a/synapse/replication/tcp/client.py
+++ b/synapse/replication/tcp/client.py
@@ -24,6 +24,7 @@ from twisted.internet.protocol import ReconnectingClientFactory
 from synapse.api.constants import EventTypes
 from synapse.logging.context import PreserveLoggingContext, make_deferred_yieldable
 from synapse.replication.tcp.protocol import ClientReplicationStreamProtocol
+from synapse.replication.tcp.streams import TypingStream
 from synapse.replication.tcp.streams.events import (
     EventsStream,
     EventsStreamEventRow,
@@ -104,6 +105,7 @@ class ReplicationDataHandler:
         self._clock = hs.get_clock()
         self._streams = hs.get_replication_streams()
         self._instance_name = hs.get_instance_name()
+        self._typing_handler = hs.get_typing_handler()
 
         # Map from stream to list of deferreds waiting for the stream to
         # arrive at a particular position. The lists are sorted by stream position.
@@ -127,6 +129,12 @@ class ReplicationDataHandler:
         """
         self.store.process_replication_rows(stream_name, instance_name, token, rows)
 
+        if stream_name == TypingStream.NAME:
+            self._typing_handler.process_replication_rows(token, rows)
+            self.notifier.on_new_event(
+                "typing_key", token, rooms=[row.room_id for row in rows]
+            )
+
         if stream_name == EventsStream.NAME:
             # We shouldn't get multiple rows per token for events stream, so
             # we don't need to optimise this for multiple rows.