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-rw-r--r--synapse/federation/sender/transaction_manager.py13
1 files changed, 10 insertions, 3 deletions
diff --git a/synapse/federation/sender/transaction_manager.py b/synapse/federation/sender/transaction_manager.py
index 62ca6a3e87..5b6c79c51a 100644
--- a/synapse/federation/sender/transaction_manager.py
+++ b/synapse/federation/sender/transaction_manager.py
@@ -26,6 +26,7 @@ from synapse.logging.opentracing import (
     set_tag,
     start_active_span_follows_from,
     tags,
+    whitelisted_homeserver,
 )
 from synapse.util.metrics import measure_func
 
@@ -59,9 +60,15 @@ class TransactionManager(object):
         # The span_contexts is a generator so that it won't be evaluated if
         # opentracing is disabled. (Yay speed!)
 
-        span_contexts = (
-            extract_text_map(json.loads(edu.get_context())) for edu in pending_edus
-        )
+        span_contexts = []
+        keep_destination = whitelisted_homeserver(destination)
+
+        for edu in pending_edus:
+            context = edu.get_context()
+            if context:
+                span_contexts.append(extract_text_map(json.loads(context)))
+            if keep_destination:
+                edu.strip_context()
 
         with start_active_span_follows_from("send_transaction", span_contexts):