Try fix for class global Kafka Producer.

import_api_app/resources/UpdateRecordSet.py

@@ -11,9 +11,11 @@ from requests.auth import HTTPBasicAuth
 
 
 class UpdateRecordSet(Resource):
-    producer = KafkaProducer(bootstrap_servers=current_app.config['kafka-broker-url'],
-                             value_serializer=lambda m: json.dumps(m, ensure_ascii=False)
-                             .encode('utf-8'))
+
+    def __init__(self):
+        self.producer = KafkaProducer(bootstrap_servers=current_app.config['kafka-broker-url'],
+                                      value_serializer=lambda m: json.dumps(m, ensure_ascii=False)
+                                      .encode('utf-8'))
 
     # Todo write/correct comment for swagger
     def get(self, record_set_id):