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-rw-r--r--synapse/storage/databases/main/events.py12
1 files changed, 8 insertions, 4 deletions
diff --git a/synapse/storage/databases/main/events.py b/synapse/storage/databases/main/events.py
index 9cd1403b38..9a80f419e3 100644
--- a/synapse/storage/databases/main/events.py
+++ b/synapse/storage/databases/main/events.py
@@ -32,7 +32,7 @@ from synapse.logging.utils import log_function
 from synapse.storage._base import db_to_json, make_in_list_sql_clause
 from synapse.storage.database import DatabasePool, LoggingTransaction
 from synapse.storage.databases.main.search import SearchEntry
-from synapse.storage.util.id_generators import StreamIdGenerator
+from synapse.storage.util.id_generators import MultiWriterIdGenerator
 from synapse.types import StateMap, get_domain_from_id
 from synapse.util.frozenutils import frozendict_json_encoder
 from synapse.util.iterutils import batch_iter
@@ -97,18 +97,21 @@ class PersistEventsStore:
         self.store = main_data_store
         self.database_engine = db.engine
         self._clock = hs.get_clock()
+        self._instance_name = hs.get_instance_name()
 
         self._ephemeral_messages_enabled = hs.config.enable_ephemeral_messages
         self.is_mine_id = hs.is_mine_id
 
         # Ideally we'd move these ID gens here, unfortunately some other ID
         # generators are chained off them so doing so is a bit of a PITA.
-        self._backfill_id_gen = self.store._backfill_id_gen  # type: StreamIdGenerator
-        self._stream_id_gen = self.store._stream_id_gen  # type: StreamIdGenerator
+        self._backfill_id_gen = (
+            self.store._backfill_id_gen
+        )  # type: MultiWriterIdGenerator
+        self._stream_id_gen = self.store._stream_id_gen  # type: MultiWriterIdGenerator
 
         # This should only exist on instances that are configured to write
         assert (
-            hs.config.worker.writers.events == hs.get_instance_name()
+            hs.get_instance_name() in hs.config.worker.writers.events
         ), "Can only instantiate EventsStore on master"
 
     async def _persist_events_and_state_updates(
@@ -809,6 +812,7 @@ class PersistEventsStore:
             table="events",
             values=[
                 {
+                    "instance_name": self._instance_name,
                     "stream_ordering": event.internal_metadata.stream_ordering,
                     "topological_ordering": event.depth,
                     "depth": event.depth,