fix: a minor misuse of tokio::select (#1266)

src/meta-srv/src/handler/failure_handler/runner.rs

@@ -16,7 +16,7 @@ use std::ops::DerefMut;
 use std::sync::Arc;
 use std::time::{Duration, Instant};
 
-use common_telemetry::error;
+use common_telemetry::{error, warn};
 use common_time::util::current_time_millis;
 use dashmap::mapref::multiple::RefMulti;
 use dashmap::DashMap;
@@ -111,6 +111,10 @@ impl FailureDetectRunner {
                             detector.heartbeat(heartbeat.heartbeat_time);
                         }
                     }
+                    else => {
+                        warn!("Both control and heartbeat senders are closed, quit receiving.");
+                        break;
+                    }
                 }
             }
         });