diff --git a/api/core/app/engine_layers/timeslice_layer.py b/api/core/app/engine_layers/timeslice_layer.py
index 4f47379a40..8d4491b93c 100644
--- a/api/core/app/engine_layers/timeslice_layer.py
+++ b/api/core/app/engine_layers/timeslice_layer.py
@@ -31,6 +31,36 @@ class TimeSliceLayer(GraphEngineLayer):
         self.cfs_plan_scheduler = cfs_plan_scheduler
         self.stopped = False
 
+    def _checker_job(self, schedule_id: str):
+        """
+        Check if the workflow need to be suspended.
+        """
+        try:
+            if self.stopped:
+                self.scheduler.remove_job(schedule_id)
+                return
+
+            if self.cfs_plan_scheduler.can_schedule() == SchedulerCommand.RESOURCE_LIMIT_REACHED:
+                # remove the job
+                self.scheduler.remove_job(schedule_id)
+
+                if not self.command_channel:
+                    logger.exception("No command channel to stop the workflow")
+                    return
+
+                # send command to pause the workflow
+                self.command_channel.send_command(
+                    GraphEngineCommand(
+                        command_type=CommandType.PAUSE,
+                        payload={
+                            "reason": SchedulerCommand.RESOURCE_LIMIT_REACHED,
+                        },
+                    )
+                )
+
+        except Exception:
+            logger.exception("scheduler error during check if the workflow need to be suspended")
+
     def on_graph_start(self):
         """
         Start timer to check if the workflow need to be suspended.
@@ -38,38 +68,12 @@ class TimeSliceLayer(GraphEngineLayer):
 
         schedule_id = uuid.uuid4().hex
 
-        def runner():
-            """
-            Whenever the workflow is running, keep checking if we need to suspend it.
-            Otherwise, return directly.
-            """
-            try:
-                if self.stopped:
-                    self.scheduler.remove_job(schedule_id)
-                    return
-
-                if self.cfs_plan_scheduler.can_schedule() == SchedulerCommand.RESOURCE_LIMIT_REACHED:
-                    # remove the job
-                    self.scheduler.remove_job(schedule_id)
-
-                    if not self.command_channel:
-                        logger.exception("No command channel to stop the workflow")
-                        return
-
-                    # send command to pause the workflow
-                    self.command_channel.send_command(
-                        GraphEngineCommand(
-                            command_type=CommandType.PAUSE,
-                            payload={
-                                "reason": SchedulerCommand.RESOURCE_LIMIT_REACHED,
-                            },
-                        )
-                    )
-
-            except Exception:
-                logger.exception("scheduler error during check if the workflow need to be suspended")
-
-        self.scheduler.add_job(runner, "interval", seconds=self.cfs_plan_scheduler.plan.granularity, id=schedule_id)
+        self.scheduler.add_job(
+            lambda: self._checker_job(schedule_id),
+            "interval",
+            seconds=self.cfs_plan_scheduler.plan.granularity,
+            id=schedule_id,
+        )
 
     def on_event(self, event: GraphEngineEvent):
         pass