Trying to launch a lifecycle node with launch_ros.actions.Node fails silently about launch_ros

[ivanpauno]

I can't reproduce the issue, it works well for me.
Could you explain it further?
Also, add system details (Installed from source or binaries, etc).

[rotu]

I'm on master branch. Closing this ticket as user error - it was not clear to me whether you could use Node action to launch a LifecycleNode. Turns out it works just fine, though I'm not sure whether this is by design or by accident.

[ivanpauno]

It is be design. LifecycleNode action does the same that Node action, and also emits some events that can be handled by user added event handlers in the launch file. If you are not using that, you can just use Node.
I would always use LifecycleNode action for lifecycle nodes, just for clarity.

See:

launch_ros/launch_ros/launch_ros/actions/lifecycle_node.py

Lines 39 to 61 in c86ee0b

	"""
	Construct a LifecycleNode action.
	Almost all of the arguments are passed to :class:`Node` and eventually
	to :class:`launch.actions.ExecuteProcess`, so see the documentation of
	those classes for additional details.
	This action additionally emits some event(s) in certain circumstances:
	- :class:`launch.events.lifecycle.StateTransition`:
	- this event is emitted when a message is published to the
	"/<node_name>/transition_event" topic, indicating the lifecycle
	node represented by this action changed state
	This action also handles some events related to lifecycle:
	- :class:`launch.events.lifecycle.ChangeState`
	- this event can be targeted to a single lifecycle node, or more than
	one, or even all lifecycle nodes, and it requests the targeted nodes
	to change state, see its documentation for more details.
	"""