debug: add println tracing to Node::stop() for CI hang diagnosis

Author: febyeji

src/lib.rs

@@ -692,6 +692,7 @@ impl Node {
 		}
 
 		log_info!(self.logger, "Shutting down LDK Node with node ID {}...", self.node_id());
+		println!("[DEBUG stop] {} sending stop signal", self.node_id());
 
 		// Stop background tasks.
 		self.stop_sender
@@ -709,20 +710,27 @@ impl Node {
 			});
 
 		// Cancel cancellable background tasks
+		println!("[DEBUG stop] {} aborting cancellable tasks", self.node_id());
 		self.runtime.abort_cancellable_background_tasks();
 
 		// Disconnect all peers.
+		println!("[DEBUG stop] {} disconnecting peers", self.node_id());
 		self.peer_manager.disconnect_all_peers();
 		log_debug!(self.logger, "Disconnected all network peers.");
 
 		// Wait until non-cancellable background tasks (mod LDK's background processor) are done.
+		println!("[DEBUG stop] {} waiting on background tasks", self.node_id());
 		self.runtime.wait_on_background_tasks();
+		println!("[DEBUG stop] {} background tasks done", self.node_id());
 
 		// Stop any runtime-dependant chain sources.
+		println!("[DEBUG stop] {} stopping chain source", self.node_id());
 		self.chain_source.stop();
 		log_debug!(self.logger, "Stopped chain sources.");
+		println!("[DEBUG stop] {} chain source stopped", self.node_id());
 
 		// Stop the background processor.
+		println!("[DEBUG stop] {} stopping background processor", self.node_id());
 		self.background_processor_stop_sender
 			.send(())
 			.map(|_| {
@@ -738,12 +746,15 @@ impl Node {
 			});
 
 		// Finally, wait until background processing stopped, at least until a timeout is reached.
+		println!("[DEBUG stop] {} waiting on background processor", self.node_id());
 		self.runtime.wait_on_background_processor_task();
+		println!("[DEBUG stop] {} background processor done", self.node_id());
 
 		#[cfg(tokio_unstable)]
 		self.runtime.log_metrics();
 
 		log_info!(self.logger, "Shutdown complete.");
+		println!("[DEBUG stop] {} shutdown complete", self.node_id());
 		*is_running_lock = false;
 		Ok(())
 	}