Merge pull request #1447 from liubin/liubin/fix-1369

agent: Stop receive message from Receiver if got None

src/agent/rustjail/src/cgroups/notifier.rs

@@ -191,7 +191,10 @@ async fn register_memory_event(
                     let content = fs::read_to_string(path.clone());
                     info!(
                         sl!(),
-                        "OOM event for container: {}, content: {:?}", &containere_id, content
+                        "cgroup event for container: {}, path: {:?}, content: {:?}",
+                        &containere_id,
+                        &path,
+                        content
                     );
                 }
             }

src/agent/src/sandbox.rs

@@ -317,7 +317,13 @@ impl Sandbox {
         tokio::spawn(async move {
             loop {
                 let event = rx.recv().await;
+                // None means the container has exited,
+                // and sender in OOM notifier is dropped.
+                if event.is_none() {
+                    return;
+                }
                 info!(logger, "got an OOM event {:?}", event);
+
                 let _ = tx
                     .send(container_id.clone())
                     .await