Don't call shutdown() after an exception (ros-controls#1400)

Author: christophfroehlich

ros2_controllers_test_nodes/ros2_controllers_test_nodes/publisher_forward_position_controller.py

@@ -70,14 +70,10 @@ def main(args=None):
 
     try:
         rclpy.spin(publisher_forward_position)
-    except KeyboardInterrupt:
+    except (KeyboardInterrupt, rclpy.executors.ExternalShutdownException):
         print("Keyboard interrupt received. Shutting down node.")
     except Exception as e:
         print(f"Unhandled exception: {e}")
-    finally:
-        if rclpy.ok():
-            publisher_forward_position.destroy_node()
-            rclpy.shutdown()
 
 
 if __name__ == "__main__":

ros2_controllers_test_nodes/ros2_controllers_test_nodes/publisher_joint_trajectory_controller.py

@@ -186,14 +186,10 @@ def main(args=None):
 
     try:
         rclpy.spin(publisher_joint_trajectory)
-    except KeyboardInterrupt:
+    except (KeyboardInterrupt, rclpy.executors.ExternalShutdownException):
         print("Keyboard interrupt received. Shutting down node.")
     except Exception as e:
         print(f"Unhandled exception: {e}")
-    finally:
-        if rclpy.ok():
-            publisher_joint_trajectory.destroy_node()
-            rclpy.shutdown()
 
 
 if __name__ == "__main__":