Merge pull request #825 from Aiven-Open/matyaskuti/log_message_error_…

…in_schemareader

Log message error on schema replay

karapace/schema_reader.py

@@ -317,6 +317,7 @@ def handle_messages(self) -> None:
             try:
                 message_key = msg.key()
                 if message_key is None:
+                    LOG.warning("Empty message key when consuming from topic %s, error: %s", msg.topic(), msg.error())
                     continue
                 key = json_decode(message_key)
             except JSONDecodeError: