diff --git a/synapse/rest/client/keys.py b/synapse/rest/client/keys.py
index eb1b85721f..a395694fa5 100644
--- a/synapse/rest/client/keys.py
+++ b/synapse/rest/client/keys.py
@@ -26,7 +26,7 @@ from synapse.http.servlet import (
parse_string,
)
from synapse.http.site import SynapseRequest
-from synapse.logging.opentracing import log_kv, set_tag, trace_with_opname
+from synapse.logging.opentracing import log_kv, set_tag
from synapse.types import JsonDict, StreamToken
from ._base import client_patterns, interactive_auth_handler
@@ -71,7 +71,6 @@ class KeyUploadServlet(RestServlet):
self.e2e_keys_handler = hs.get_e2e_keys_handler()
self.device_handler = hs.get_device_handler()
- @trace_with_opname("upload_keys")
async def on_POST(
self, request: SynapseRequest, device_id: Optional[str]
) -> Tuple[int, JsonDict]:
@@ -208,7 +207,9 @@ class KeyChangesServlet(RestServlet):
# We want to enforce they do pass us one, but we ignore it and return
# changes after the "to" as well as before.
- set_tag("to", parse_string(request, "to"))
+ #
+ # XXX This does not enforce that "to" is passed.
+ set_tag("to", str(parse_string(request, "to")))
from_token = await StreamToken.from_string(self.store, from_token_string)
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