Add extra diagnostics

DiamondLightSource · Nov 11, 2024 · 73dcf8c · 73dcf8c
1 parent cbad0e0
commit 73dcf8c
Showing 1 changed file with 9 additions and 1 deletion.
diff --git a/src/workflows/transport/pika_transport.py b/src/workflows/transport/pika_transport.py
@@ -330,7 +330,15 @@ def _call_message_callback(
         body: bytes,
     ):
         """Rewrite and redirect a pika callback to the subscription function"""
-        merged_headers = dict(properties.headers)
+        if properties.headers is None:
+            logger.warning(
+                f"""Got unexpected empty header; this could be an error?
+{_channel=}
+{method=}
+{properties=}
+{body=}"""
+            )
+        merged_headers = dict(properties.headers or {})
         merged_headers.update(
             {
                 "consumer_tag": str(method.consumer_tag),