amoghrajesh commented on code in PR #67530:
URL: https://github.com/apache/airflow/pull/67530#discussion_r3309008543


##########
task-sdk/src/airflow/sdk/execution_time/context.py:
##########
@@ -512,14 +512,13 @@ def get(self, key: str) -> JsonValue:
             raise AirflowRuntimeError(resp)
         if isinstance(resp, TaskStateResult):
             stored = resp.value
-            # if custom backend is configured, the stored value in DB is a 
reference, fetch the actual value from
-            # custom backend using the reference
             backend = _get_worker_state_backend()
-            if backend is not None:
-                # serialize_task_state_to_ref always returns str by contract; 
stored contains the ref.
+            if backend is not None and isinstance(stored, dict) and 
stored.get("__type") == "ExternalState":
+                # unwrap the marker to get the ref, and retrieve the actual 
value from the backend using the ref
+                ref = stored["__var"]
                 if TYPE_CHECKING:
-                    assert isinstance(stored, str)
-                return backend.deserialize_task_state_from_ref(stored)
+                    assert isinstance(ref, str)
+                return backend.deserialize_task_state_from_ref(ref)
             return stored

Review Comment:
   Handled in d101f308a3



##########
task-sdk/src/airflow/sdk/execution_time/context.py:
##########
@@ -512,14 +512,13 @@ def get(self, key: str) -> JsonValue:
             raise AirflowRuntimeError(resp)
         if isinstance(resp, TaskStateResult):
             stored = resp.value
-            # if custom backend is configured, the stored value in DB is a 
reference, fetch the actual value from
-            # custom backend using the reference
             backend = _get_worker_state_backend()
-            if backend is not None:
-                # serialize_task_state_to_ref always returns str by contract; 
stored contains the ref.
+            if backend is not None and isinstance(stored, dict) and 
stored.get("__type") == "ExternalState":

Review Comment:
   Handled in 
https://github.com/apache/airflow/commit/d101f308a37312809a2a4c9486b036fc8c11bb6f



##########
task-sdk/src/airflow/sdk/execution_time/context.py:
##########
@@ -512,14 +512,13 @@ def get(self, key: str) -> JsonValue:
             raise AirflowRuntimeError(resp)
         if isinstance(resp, TaskStateResult):
             stored = resp.value
-            # if custom backend is configured, the stored value in DB is a 
reference, fetch the actual value from
-            # custom backend using the reference
             backend = _get_worker_state_backend()
-            if backend is not None:
-                # serialize_task_state_to_ref always returns str by contract; 
stored contains the ref.
+            if backend is not None and isinstance(stored, dict) and 
stored.get("__type") == "ExternalState":
+                # unwrap the marker to get the ref, and retrieve the actual 
value from the backend using the ref
+                ref = stored["__var"]

Review Comment:
   Handled in 
https://github.com/apache/airflow/commit/d101f308a37312809a2a4c9486b036fc8c11bb6f



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