Avoid doing presence updates on replication reconnect github/matrix-org-hotfixes-refactor matrix-org-hotfixes-refactor

Presence is supposed to be disabled on matrix.org, so we shouldn't send a load
of USER_SYNC commands every time the synchrotron reconnects to the master.

1 files changed, 1 insertions, 0 deletions

diff --git a/synapse/handlers/presence.py b/synapse/handlers/presence.py

index 2a2cfd9339..17f577d5cd 100644
--- a/synapse/handlers/presence.py
+++ b/synapse/handlers/presence.py
@@ -445,6 +445,7 @@ class PresenceHandler(object):
         Returns:
             set(str): A set of user_id strings.
         """
+        # presence is disabled on matrix.org, so we return the empty set
         return set()
         syncing_user_ids = {
             user_id for user_id, count in self.user_to_num_current_syncs.items()