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-rw-r--r--synapse/replication/tcp/handler.py9
-rw-r--r--synapse/replication/tcp/streams/_base.py7
2 files changed, 13 insertions, 3 deletions
diff --git a/synapse/replication/tcp/handler.py b/synapse/replication/tcp/handler.py
index 80f5df60f9..30d8de48fa 100644
--- a/synapse/replication/tcp/handler.py
+++ b/synapse/replication/tcp/handler.py
@@ -42,6 +42,7 @@ from synapse.replication.tcp.streams import (
     EventsStream,
     FederationStream,
     Stream,
+    TypingStream,
 )
 from synapse.util.async_helpers import Linearizer
 
@@ -96,6 +97,14 @@ class ReplicationCommandHandler:
 
                 continue
 
+            if isinstance(stream, TypingStream):
+                # Only add TypingStream as a source on the instance in charge of
+                # typing.
+                if hs.config.worker.writers.typing == hs.get_instance_name():
+                    self._streams_to_replicate.append(stream)
+
+                continue
+
             # Only add any other streams if we're on master.
             if hs.config.worker_app is not None:
                 continue
diff --git a/synapse/replication/tcp/streams/_base.py b/synapse/replication/tcp/streams/_base.py
index 9076bbe9f1..7a42de3f7d 100644
--- a/synapse/replication/tcp/streams/_base.py
+++ b/synapse/replication/tcp/streams/_base.py
@@ -294,11 +294,12 @@ class TypingStream(Stream):
     def __init__(self, hs):
         typing_handler = hs.get_typing_handler()
 
-        if hs.config.worker_app is None:
-            # on the master, query the typing handler
+        writer_instance = hs.config.worker.writers.typing
+        if writer_instance == hs.get_instance_name():
+            # On the writer, query the typing handler
             update_function = typing_handler.get_all_typing_updates
         else:
-            # Query master process
+            # Query the typing writer process
             update_function = make_http_update_function(hs, self.NAME)
 
         super().__init__(