Propagate entity operation failures over legacy entity protocol

call_entity failures delivered via the legacy entity protocol (used by the Azure Functions Durable extension) were silently completing instead of raising. _handle_entity_event_raised now detects failed ResponseMessage payloads (exceptionType/failureDetails) and fails the task with an EntityOperationFailedException, matching the current entity protocol and the .NET SDK.

Author: andystaples

CHANGELOG.md

@@ -11,6 +11,10 @@ CHANGED
 
 - Changed the default large-payload externalization threshold (`LargePayloadStorageOptions.threshold_bytes`) from 900,000 bytes to 262,144 bytes (256 KiB), matching the .NET SDK default. Behavioral change (not source/binary breaking): payloads larger than 256 KiB are now externalized by default.
 
+FIXED
+
+- Fixed `OrchestrationContext.call_entity` not propagating entity operation failures when running under the legacy entity protocol (used by the Azure Functions Durable extension). A failed entity operation now raises `TaskFailedError` in the calling orchestration instead of silently completing, matching the behavior of the current entity protocol and the .NET SDK.
+
 ## v1.7.0
 
 ADDED

durabletask/internal/helpers.py

@@ -3,6 +3,7 @@
 
 import traceback
 from datetime import datetime, timezone
+from typing import Any, cast
 
 from google.protobuf import timestamp_pb2, wrappers_pb2
 
@@ -136,6 +137,37 @@ def new_failure_details(ex: Exception, _visited: set[int] | None = None) -> pb.T
     )
 
 
+def _failure_details_from_core_dict(fd: dict[str, Any]) -> pb.TaskFailureDetails:
+    """Convert a serialized DurableTask.Core ``FailureDetails`` dict to protobuf."""
+    inner = fd.get("InnerFailure")
+    stack_trace = fd.get("StackTrace")
+    return pb.TaskFailureDetails(
+        errorType=str(fd.get("ErrorType") or ""),
+        errorMessage=str(fd.get("ErrorMessage") or ""),
+        stackTrace=get_string_value(str(stack_trace) if stack_trace is not None else None),
+        innerFailure=_failure_details_from_core_dict(cast(dict[str, Any], inner)) if isinstance(inner, dict) else None,
+        isNonRetriable=bool(fd.get("IsNonRetriable", False)),
+    )
+
+
+def entity_response_failure_details(response: dict[str, Any]) -> pb.TaskFailureDetails | None:
+    """Extract failure details from a legacy-protocol entity ``ResponseMessage``.
+
+    The legacy entity protocol (used when the Durable WebJobs extension
+    translates entity operations) delivers operation results as a
+    ``ResponseMessage`` whose ``exceptionType`` (error message) or
+    ``failureDetails`` field is populated when the operation failed. Returns
+    ``None`` when the response represents a successful operation.
+    """
+    failure_details = response.get("failureDetails")
+    if isinstance(failure_details, dict):
+        return _failure_details_from_core_dict(cast(dict[str, Any], failure_details))
+    error_message = response.get("exceptionType")
+    if error_message is not None:
+        return pb.TaskFailureDetails(errorType="", errorMessage=str(error_message))
+    return None
+
+
 def new_event_sent_event(event_id: int, instance_id: str, input: str):
     return pb.HistoryEvent(
         eventId=event_id,

durabletask/worker.py

@@ -2574,7 +2574,7 @@ def _cancel_timer() -> None:
             elif event.HasField("eventRaised"):
                 if event.eventRaised.name in ctx._entity_task_id_map:  # pyright: ignore[reportPrivateUsage]
                     entity_id, operation, task_id = ctx._entity_task_id_map.get(event.eventRaised.name, (None, None, None))  # pyright: ignore[reportPrivateUsage]
-                    self._handle_entity_event_raised(ctx, event, entity_id, task_id, False)
+                    self._handle_entity_event_raised(ctx, event, entity_id, task_id, False, operation)
                 elif event.eventRaised.name in ctx._entity_lock_task_id_map:  # pyright: ignore[reportPrivateUsage]
                     entity_id, task_id = ctx._entity_lock_task_id_map.get(event.eventRaised.name, (None, None))  # pyright: ignore[reportPrivateUsage]
                     self._handle_entity_event_raised(ctx, event, entity_id, task_id, True)
@@ -2803,7 +2803,8 @@ def _handle_entity_event_raised(self,
                                     event: pb.HistoryEvent,
                                     entity_id: EntityInstanceId | None,
                                     task_id: int | None,
-                                    is_lock_event: bool):
+                                    is_lock_event: bool,
+                                    operation: str | None = None):
         # This eventRaised represents the result of an entity operation after being translated to the old
         # entity protocol by the Durable WebJobs extension
         if entity_id is None:
@@ -2813,14 +2814,31 @@ def _handle_entity_event_raised(self,
         entity_task = ctx._pending_tasks.pop(task_id, None)  # pyright: ignore[reportPrivateUsage]
         if not entity_task:
             raise RuntimeError(f"Could not retrieve entity task for entity-related eventRaised with ID '{event.eventId}'")
-        result = None
+        response: Any | None = None
         if not ph.is_empty(event.eventRaised.input):
+            response = self._data_converter.deserialize(event.eventRaised.input.value)
+
+        # For entity operation calls (lock acquisitions never fail this way), the legacy-protocol
+        # ResponseMessage signals a failed operation via its "exceptionType" (error message) or
+        # "failureDetails" field. Propagate that as a task failure so an awaiting call_entity raises,
+        # matching the new entity protocol and the .NET SDK.
+        if not is_lock_event and isinstance(response, dict):
+            failure_details = ph.entity_response_failure_details(cast(dict[str, Any], response))
+            if failure_details is not None:
+                failure = EntityOperationFailedException(entity_id, operation or "", failure_details)
+                ctx._entity_context.recover_lock_after_call(entity_id)  # pyright: ignore[reportPrivateUsage]
+                entity_task.fail(str(failure), failure)
+                ctx.resume()
+                return
+
+        result = None
+        if response is not None:
             # TODO: Investigate why the event result is wrapped in a dict with "result" key
             # The expected type applies to the unwrapped result value, not the
             # transport wrapper. Unwrap first, then coerce the already-parsed
             # inner value to the expected type via the converter (no redundant
             # re-serialization round-trip).
-            unwrapped = self._data_converter.deserialize(event.eventRaised.input.value)["result"]
+            unwrapped: Any = cast(Any, response)["result"]
             result = self._data_converter.coerce(
                 unwrapped,
                 entity_task._expected_type,  # pyright: ignore[reportPrivateUsage]

tests/durabletask/test_orchestration_executor.py

@@ -2095,6 +2095,131 @@ def orchestrator(ctx: task.OrchestrationContext, _):
     assert actions[0].sendEntityMessage.entityOperationCalled.targetInstanceId.value == str(test_entity_id)
 
 
+def test_entity_call_failure_propagated_over_old_protocol():
+    """A failed entity operation delivered via the legacy protocol (an eventRaised
+    ResponseMessage with failureDetails) must surface as a TaskFailedError to the caller."""
+    test_entity_id = entities.EntityInstanceId("Counter", "myCounter")
+
+    def orchestrator(ctx: task.OrchestrationContext, _):
+        try:
+            yield ctx.call_entity(test_entity_id, "set", 1)
+        except task.TaskFailedError as e:
+            return e.details.message
+        return "no error"
+
+    registry = worker._Registry()
+    name = registry.add_orchestrator(orchestrator)
+
+    started_events = [
+        helpers.new_orchestrator_started_event(),
+        helpers.new_execution_started_event(name, TEST_INSTANCE_ID, None),
+    ]
+
+    executor = worker._OrchestrationExecutor(registry, TEST_LOGGER, JsonDataConverter())
+    result1 = executor.execute(TEST_INSTANCE_ID, [], started_events)
+    actions = result1.actions
+    assert len(actions) == 1
+    assert actions[0].sendEntityMessage.HasField("entityOperationCalled")
+    request_id = actions[0].sendEntityMessage.entityOperationCalled.requestId
+
+    # The Durable WebJobs extension translates a failed entity operation into a
+    # legacy-protocol ResponseMessage carrying a serialized FailureDetails.
+    response_message = {
+        "result": None,
+        "failureDetails": {
+            "ErrorType": "ValueError",
+            "ErrorMessage": "Something went wrong!",
+            "StackTrace": None,
+            "InnerFailure": None,
+            "IsNonRetriable": False,
+        },
+    }
+    new_events = [
+        helpers.new_event_sent_event(1, str(test_entity_id), json.dumps({"id": request_id})),
+        helpers.new_event_raised_event(request_id, json.dumps(response_message)),
+    ]
+    result2 = executor.execute(TEST_INSTANCE_ID, started_events, new_events)
+    complete_action = get_and_validate_complete_orchestration_action_list(1, result2.actions)
+    assert complete_action.orchestrationStatus == pb.ORCHESTRATION_STATUS_COMPLETED
+    output = json.loads(complete_action.result.value)
+    assert output == (
+        "Operation 'set' on entity '@counter@myCounter' failed with error: Something went wrong!"
+    )
+
+
+def test_entity_call_failure_propagated_over_old_protocol_exception_type():
+    """A failed entity operation whose legacy ResponseMessage only carries the
+    ``exceptionType`` (error message) field must still surface as a TaskFailedError."""
+    test_entity_id = entities.EntityInstanceId("Counter", "myCounter")
+
+    def orchestrator(ctx: task.OrchestrationContext, _):
+        try:
+            yield ctx.call_entity(test_entity_id, "set", 1)
+        except task.TaskFailedError as e:
+            return e.details.message
+        return "no error"
+
+    registry = worker._Registry()
+    name = registry.add_orchestrator(orchestrator)
+
+    started_events = [
+        helpers.new_orchestrator_started_event(),
+        helpers.new_execution_started_event(name, TEST_INSTANCE_ID, None),
+    ]
+
+    executor = worker._OrchestrationExecutor(registry, TEST_LOGGER, JsonDataConverter())
+    result1 = executor.execute(TEST_INSTANCE_ID, [], started_events)
+    actions = result1.actions
+    assert len(actions) == 1
+    request_id = actions[0].sendEntityMessage.entityOperationCalled.requestId
+
+    response_message = {"result": None, "exceptionType": "Something went wrong!"}
+    new_events = [
+        helpers.new_event_sent_event(1, str(test_entity_id), json.dumps({"id": request_id})),
+        helpers.new_event_raised_event(request_id, json.dumps(response_message)),
+    ]
+    result2 = executor.execute(TEST_INSTANCE_ID, started_events, new_events)
+    complete_action = get_and_validate_complete_orchestration_action_list(1, result2.actions)
+    assert complete_action.orchestrationStatus == pb.ORCHESTRATION_STATUS_COMPLETED
+    output = json.loads(complete_action.result.value)
+    assert output == (
+        "Operation 'set' on entity '@counter@myCounter' failed with error: Something went wrong!"
+    )
+
+
+def test_entity_call_success_over_old_protocol():
+    """A successful entity operation delivered via the legacy protocol must
+    complete the call_entity task with the unwrapped result."""
+    test_entity_id = entities.EntityInstanceId("Counter", "myCounter")
+
+    def orchestrator(ctx: task.OrchestrationContext, _):
+        return (yield ctx.call_entity(test_entity_id, "get", return_type=int))
+
+    registry = worker._Registry()
+    name = registry.add_orchestrator(orchestrator)
+
+    started_events = [
+        helpers.new_orchestrator_started_event(),
+        helpers.new_execution_started_event(name, TEST_INSTANCE_ID, None),
+    ]
+
+    executor = worker._OrchestrationExecutor(registry, TEST_LOGGER, JsonDataConverter())
+    result1 = executor.execute(TEST_INSTANCE_ID, [], started_events)
+    actions = result1.actions
+    assert len(actions) == 1
+    request_id = actions[0].sendEntityMessage.entityOperationCalled.requestId
+
+    response_message = {"result": json.dumps(42)}
+    new_events = [
+        helpers.new_event_sent_event(1, str(test_entity_id), json.dumps({"id": request_id})),
+        helpers.new_event_raised_event(request_id, json.dumps(response_message)),
+    ]
+    result2 = executor.execute(TEST_INSTANCE_ID, started_events, new_events)
+    complete_action = get_and_validate_complete_orchestration_action_list(1, result2.actions)
+    assert complete_action.orchestrationStatus == pb.ORCHESTRATION_STATUS_COMPLETED
+    assert json.loads(complete_action.result.value) == 42
+
+
 def get_and_validate_complete_orchestration_action_list(expected_action_count: int, actions: list[pb.OrchestratorAction]) -> pb.CompleteOrchestrationAction:
     assert len(actions) == expected_action_count
     assert type(actions[-1]) is pb.OrchestratorAction