diff --git a/api/core/app/apps/pipeline/pipeline_generator.py b/api/core/app/apps/pipeline/pipeline_generator.py
index 2bc89ed99c..271abbfe2f 100644
--- a/api/core/app/apps/pipeline/pipeline_generator.py
+++ b/api/core/app/apps/pipeline/pipeline_generator.py
@@ -16,7 +16,8 @@ from sqlalchemy.orm import sessionmaker
 import contexts
 from configs import dify_config
 from core.app.apps.base_app_generator import BaseAppGenerator
-from core.app.apps.base_app_queue_manager import AppQueueManager, GenerateTaskStoppedError, PublishFrom
+from core.app.apps.base_app_queue_manager import AppQueueManager, PublishFrom
+from core.app.apps.exc import GenerateTaskStoppedError
 from core.app.apps.pipeline.pipeline_config_manager import PipelineConfigManager
 from core.app.apps.pipeline.pipeline_queue_manager import PipelineQueueManager
 from core.app.apps.pipeline.pipeline_runner import PipelineRunner
diff --git a/api/core/app/apps/pipeline/pipeline_queue_manager.py b/api/core/app/apps/pipeline/pipeline_queue_manager.py
index d0aeac8a9c..151b50f238 100644
--- a/api/core/app/apps/pipeline/pipeline_queue_manager.py
+++ b/api/core/app/apps/pipeline/pipeline_queue_manager.py
@@ -1,4 +1,5 @@
-from core.app.apps.base_app_queue_manager import AppQueueManager, GenerateTaskStoppedError, PublishFrom
+from core.app.apps.base_app_queue_manager import AppQueueManager, PublishFrom
+from core.app.apps.exc import GenerateTaskStoppedError
 from core.app.entities.app_invoke_entities import InvokeFrom
 from core.app.entities.queue_entities import (
     AppQueueEvent,
diff --git a/api/core/workflow/nodes/datasource/datasource_node.py b/api/core/workflow/nodes/datasource/datasource_node.py
index d81e6a99e4..3fff1025fa 100644
--- a/api/core/workflow/nodes/datasource/datasource_node.py
+++ b/api/core/workflow/nodes/datasource/datasource_node.py
@@ -38,12 +38,12 @@ from .entities import DatasourceNodeData
 from .exc import DatasourceNodeError, DatasourceParameterError
 
 
-class DatasourceNode(BaseNode[DatasourceNodeData]):
+class DatasourceNode(BaseNode):
     """
     Datasource Node
     """
 
-    _node_data_cls = DatasourceNodeData
+    _node_data: DatasourceNodeData
     _node_type = NodeType.DATASOURCE
 
     def _run(self) -> Generator:
@@ -51,7 +51,7 @@ class DatasourceNode(BaseNode[DatasourceNodeData]):
         Run the datasource node
         """
 
-        node_data = cast(DatasourceNodeData, self.node_data)
+        node_data = cast(DatasourceNodeData, self._node_data)
         variable_pool = self.graph_runtime_state.variable_pool
         datasource_type = variable_pool.get(["sys", SystemVariableKey.DATASOURCE_TYPE.value])
         if not datasource_type:
@@ -90,12 +90,12 @@ class DatasourceNode(BaseNode[DatasourceNodeData]):
         parameters = self._generate_parameters(
             datasource_parameters=datasource_parameters,
             variable_pool=variable_pool,
-            node_data=self.node_data,
+            node_data=self._node_data,
         )
         parameters_for_log = self._generate_parameters(
             datasource_parameters=datasource_parameters,
             variable_pool=variable_pool,
-            node_data=self.node_data,
+            node_data=self._node_data,
             for_log=True,
         )
 
@@ -421,7 +421,7 @@ class DatasourceNode(BaseNode[DatasourceNodeData]):
                 )
             elif message.type == DatasourceMessage.MessageType.JSON:
                 assert isinstance(message.message, DatasourceMessage.JsonMessage)
-                if self.node_type == NodeType.AGENT:
+                if self._node_type == NodeType.AGENT:
                     msg_metadata = message.message.json_object.pop("execution_metadata", {})
                     agent_execution_metadata = {
                         key: value
diff --git a/api/core/workflow/nodes/knowledge_index/knowledge_index_node.py b/api/core/workflow/nodes/knowledge_index/knowledge_index_node.py
index ad89a7ad08..20f074b48f 100644
--- a/api/core/workflow/nodes/knowledge_index/knowledge_index_node.py
+++ b/api/core/workflow/nodes/knowledge_index/knowledge_index_node.py
@@ -34,12 +34,12 @@ default_retrieval_model = {
 }
 
 
-class KnowledgeIndexNode(BaseNode[KnowledgeIndexNodeData]):
-    _node_data_cls = KnowledgeIndexNodeData  # type: ignore
+class KnowledgeIndexNode(BaseNode):
+    _node_data: KnowledgeIndexNodeData
     _node_type = NodeType.KNOWLEDGE_INDEX
 
     def _run(self) -> NodeRunResult:  # type: ignore
-        node_data = cast(KnowledgeIndexNodeData, self.node_data)
+        node_data = cast(KnowledgeIndexNodeData, self._node_data)
         variable_pool = self.graph_runtime_state.variable_pool
         dataset_id = variable_pool.get(["sys", SystemVariableKey.DATASET_ID])
         if not dataset_id: