From 204bdb7f07d4cb4a6cf5fda404071a4f0210bcbb Mon Sep 17 00:00:00 2001
From: David Robertson <davidr@element.io>
Date: Tue, 31 Jan 2023 11:09:27 +0000
Subject: [PATCH] Tag /send_join responses to detect faster joins

---
 synapse/federation/federation_server.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/synapse/federation/federation_server.py b/synapse/federation/federation_server.py
index 3197939a36..22f49033e0 100644
--- a/synapse/federation/federation_server.py
+++ b/synapse/federation/federation_server.py
@@ -63,6 +63,7 @@ from synapse.logging.context import (
 )
 from synapse.logging.opentracing import (
     log_kv,
+    set_tag,
     start_active_span_from_edu,
     tag_args,
     trace,
@@ -678,6 +679,7 @@ class FederationServer(FederationBase):
         room_id: str,
         caller_supports_partial_state: bool = False,
     ) -> Dict[str, Any]:
+        set_tag("partial_state", caller_supports_partial_state)
         await self._room_member_handler._join_rate_per_room_limiter.ratelimit(  # type: ignore[has-type]
             requester=None,
             key=room_id,