RDBC-893 Fix parsing of errors inside RequestExecutor._handle_unsuccessful_response

Author: poissoncorp

ravendb/http/request_executor.py

@@ -7,6 +7,7 @@
 import os
 from concurrent.futures import ThreadPoolExecutor, Future, FIRST_COMPLETED, wait, ALL_COMPLETED
 import uuid
+from json import JSONDecodeError
 from threading import Timer, Semaphore, Lock
 
 import requests
@@ -1103,9 +1104,13 @@ def _handle_unsuccessful_response(
             return True
         else:
             command.on_response_failure(response)
-            raise RuntimeError(
-                json.loads(response.text).get("Message", "Missing message")
-            )  # todo: Exception dispatcher
+            try: # todo: exception dispatcher
+                raise RuntimeError(
+                    json.loads(response.text).get("Message", "Missing message")
+                )
+            except JSONDecodeError as e:
+                raise RuntimeError(
+                    f"Failed to parse response: {response.text}") from e
 
         return False