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-rw-r--r--synapse/logging/opentracing.py14
1 files changed, 10 insertions, 4 deletions
diff --git a/synapse/logging/opentracing.py b/synapse/logging/opentracing.py
index cd1ff6a518..0638cec429 100644
--- a/synapse/logging/opentracing.py
+++ b/synapse/logging/opentracing.py
@@ -169,6 +169,7 @@ import contextlib
 import inspect
 import logging
 import re
+import types
 from functools import wraps
 from typing import Dict
 
@@ -778,8 +779,7 @@ def trace_servlet(servlet_name, extract_context=False):
             return func
 
         @wraps(func)
-        @defer.inlineCallbacks
-        def _trace_servlet_inner(request, *args, **kwargs):
+        async def _trace_servlet_inner(request, *args, **kwargs):
             request_tags = {
                 "request_id": request.get_request_id(),
                 tags.SPAN_KIND: tags.SPAN_KIND_RPC_SERVER,
@@ -796,8 +796,14 @@ def trace_servlet(servlet_name, extract_context=False):
                 scope = start_active_span(servlet_name, tags=request_tags)
 
             with scope:
-                result = yield defer.maybeDeferred(func, request, *args, **kwargs)
-                return result
+                result = func(request, *args, **kwargs)
+
+                if not isinstance(result, (types.CoroutineType, defer.Deferred)):
+                    # Some servlets aren't async and just return results
+                    # directly, so we handle that here.
+                    return result
+
+                return await result
 
         return _trace_servlet_inner