diff --git a/graphdatascience/arrow_client/authenticated_flight_client.py b/graphdatascience/arrow_client/authenticated_flight_client.py
index 2cd7e4efe..00d93f5cf 100644
--- a/graphdatascience/arrow_client/authenticated_flight_client.py
+++ b/graphdatascience/arrow_client/authenticated_flight_client.py
@@ -180,7 +180,7 @@ def do_action(self, endpoint: str, payload: bytes | dict[str, Any]) -> Iterator[
 
         return self._flight_client.do_action(Action(endpoint, payload_bytes))  # type: ignore
 
-    def do_action_with_retry(self, endpoint: str, payload: bytes | dict[str, Any]) -> Iterator[Result]:
+    def do_action_with_retry(self, endpoint: str, payload: bytes | dict[str, Any]) -> list[Result]:
         @retry(
             reraise=True,
             before=before_log("Send action", self._logger, logging.DEBUG),
@@ -188,8 +188,10 @@ def do_action_with_retry(self, endpoint: str, payload: bytes | dict[str, Any]) -
             stop=self._retry_config.stop,
             wait=self._retry_config.wait,
         )
-        def run_with_retry() -> Iterator[Result]:
-            return self.do_action(endpoint, payload)
+        def run_with_retry() -> list[Result]:
+            # the Flight response error code is only checked on iterator consumption
+            # we eagerly collect iterator here to trigger retry in case of an error
+            return list(self.do_action(endpoint, payload))
 
         return run_with_retry()
 
diff --git a/graphdatascience/arrow_client/v2/data_mapper_utils.py b/graphdatascience/arrow_client/v2/data_mapper_utils.py
index 6cd3ebc1f..073557728 100644
--- a/graphdatascience/arrow_client/v2/data_mapper_utils.py
+++ b/graphdatascience/arrow_client/v2/data_mapper_utils.py
@@ -1,10 +1,10 @@
 import json
-from typing import Any, Iterator
+from typing import Any
 
 from pyarrow._flight import Result
 
 
-def deserialize_single(input_stream: Iterator[Result]) -> dict[str, Any]:
+def deserialize_single(input_stream: list[Result]) -> dict[str, Any]:
     rows = deserialize(input_stream)
     if len(rows) != 1:
         raise ValueError(f"Expected exactly one result, got {len(rows)}")
@@ -12,8 +12,8 @@ def deserialize_single(input_stream: Iterator[Result]) -> dict[str, Any]:
     return rows[0]
 
 
-def deserialize(input_stream: Iterator[Result]) -> list[dict[str, Any]]:
+def deserialize(input_stream: list[Result]) -> list[dict[str, Any]]:
     def deserialize_row(row: Result):  # type:ignore
         return json.loads(row.body.to_pybytes().decode())
 
-    return [deserialize_row(row) for row in list(input_stream)]
+    return [deserialize_row(row) for row in input_stream]
diff --git a/graphdatascience/tests/integrationV2/procedure_surface/arrow/graph_creation_helper.py b/graphdatascience/tests/integrationV2/procedure_surface/arrow/graph_creation_helper.py
index 1324622c8..e0833fcbd 100644
--- a/graphdatascience/tests/integrationV2/procedure_surface/arrow/graph_creation_helper.py
+++ b/graphdatascience/tests/integrationV2/procedure_surface/arrow/graph_creation_helper.py
@@ -15,8 +15,7 @@ def create_graph(
     arrow_client: AuthenticatedArrowClient, graph_name: str, gdl: str, undirected: tuple[str, str] | None = None
 ) -> Generator[GraphV2, Any, None]:
     try:
-        raw_res = arrow_client.do_action("v2/graph.fromGDL", {"graphName": graph_name, "gdlGraph": gdl})
-        deserialize_single(raw_res)
+        raw_res = list(arrow_client.do_action("v2/graph.fromGDL", {"graphName": graph_name, "gdlGraph": gdl}))
 
         if undirected is not None:
             JobClient.run_job_and_wait(
@@ -26,9 +25,11 @@ def create_graph(
                 show_progress=False,
             )
 
-            raw_res = arrow_client.do_action(
-                "v2/graph.relationships.drop",
-                {"graphName": graph_name, "relationshipType": undirected[0]},
+            raw_res = list(
+                arrow_client.do_action(
+                    "v2/graph.relationships.drop",
+                    {"graphName": graph_name, "relationshipType": undirected[0]},
+                )
             )
             deserialize_single(raw_res)
 
diff --git a/graphdatascience/tests/unit/arrow_client/V2/test_data_mapper_utils.py b/graphdatascience/tests/unit/arrow_client/V2/test_data_mapper_utils.py
index 0465dc565..91544bfe5 100644
--- a/graphdatascience/tests/unit/arrow_client/V2/test_data_mapper_utils.py
+++ b/graphdatascience/tests/unit/arrow_client/V2/test_data_mapper_utils.py
@@ -1,26 +1,20 @@
-from typing import Iterator
-
 import pytest
-from pyarrow._flight import Result
 
 from graphdatascience.arrow_client.v2.data_mapper_utils import deserialize_single
 from graphdatascience.tests.unit.arrow_client.arrow_test_utils import ArrowTestResult
 
 
 def test_deserialize_single_success() -> None:
-    input_stream = iter([ArrowTestResult({"key": "value"})])
     expected = {"key": "value"}
-    actual = deserialize_single(input_stream)
+    actual = deserialize_single([ArrowTestResult({"key": "value"})])
     assert expected == actual
 
 
 def test_deserialize_single_raises_on_empty_stream() -> None:
-    input_stream: Iterator[Result] = iter([])
     with pytest.raises(ValueError, match="Expected exactly one result, got 0"):
-        deserialize_single(input_stream)
+        deserialize_single([])
 
 
 def test_deserialize_single_raises_on_multiple_results() -> None:
-    input_stream = iter([ArrowTestResult({"key1": "value1"}), ArrowTestResult({"key2": "value2"})])
     with pytest.raises(ValueError, match="Expected exactly one result, got 2"):
-        deserialize_single(input_stream)
+        deserialize_single([ArrowTestResult({"key1": "value1"}), ArrowTestResult({"key2": "value2"})])