diff --git a/synapse/logging/opentracing.py b/synapse/logging/opentracing.py
index 21dbd9f415..d39ac62168 100644
--- a/synapse/logging/opentracing.py
+++ b/synapse/logging/opentracing.py
@@ -172,11 +172,11 @@ from functools import wraps
from typing import TYPE_CHECKING, Dict, Optional, Type
import attr
-from canonicaljson import json
from twisted.internet import defer
from synapse.config import ConfigError
+from synapse.util import json_decoder, json_encoder
if TYPE_CHECKING:
from synapse.http.site import SynapseRequest
@@ -499,7 +499,9 @@ def start_active_span_from_edu(
if opentracing is None:
return _noop_context_manager()
- carrier = json.loads(edu_content.get("context", "{}")).get("opentracing", {})
+ carrier = json_decoder.decode(edu_content.get("context", "{}")).get(
+ "opentracing", {}
+ )
context = opentracing.tracer.extract(opentracing.Format.TEXT_MAP, carrier)
_references = [
opentracing.child_of(span_context_from_string(x))
@@ -690,7 +692,7 @@ def active_span_context_as_string():
opentracing.tracer.inject(
opentracing.tracer.active_span, opentracing.Format.TEXT_MAP, carrier
)
- return json.dumps(carrier)
+ return json_encoder.encode(carrier)
@only_if_tracing
@@ -699,7 +701,7 @@ def span_context_from_string(carrier):
Returns:
The active span context decoded from a string.
"""
- carrier = json.loads(carrier)
+ carrier = json_decoder.decode(carrier)
return opentracing.tracer.extract(opentracing.Format.TEXT_MAP, carrier)
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