Do not wait unfinished tokio task if they does not exit after 30 seconds

ckb-bin/src/lib.rs

@@ -8,6 +8,7 @@ mod subcommand;
 use ckb_app_config::{cli, ExitCode, Setup};
 use ckb_async_runtime::new_global_runtime;
 use ckb_build_info::Version;
+use ckb_channel::select;
 use ckb_logger::info;
 use ckb_network::tokio;
 use helper::raise_fd_limit;
@@ -81,8 +82,14 @@ pub fn run_app(version: Version) -> Result<(), ExitCode> {
 
         tokio::task::block_in_place(|| {
             info!("waiting all tokio tasks exit...");
-            handle_stop_rx.blocking_recv();
-            info!("all tokio tasks and threads have exited, ckb shutdown");
+            select! {
+                handle_stop_rx.blocking_recv() -> _ => {
+                    info!("all tokio tasks and threads have exited, ckb shutdown");
+                },
+                default(std::time::Duration::from_seconds(30)) => {
+                    info!("waiting tokio tasks exit timeout, ckb shutdown");
+                }
+            }
         });
     }