diff --git a/bagua-core-internal/src/lib.rs b/bagua-core-internal/src/lib.rs
index 82d964f..9790612 100644
--- a/bagua-core-internal/src/lib.rs
+++ b/bagua-core-internal/src/lib.rs
@@ -16,10 +16,12 @@ use crate::telemetry::{SCHEDULED_THREAD_POOL, TELEMETRY};
 use cpp::cpp;
 use datatypes::{BaguaBucket, BaguaTensor};
 use events::BaguaEventChannel;
+use flume::RecvTimeoutError;
 use hashbrown::{HashMap, HashSet};
 use std::collections::VecDeque;
 use std::fmt::Debug;
 use std::sync::Arc;
+use std::time::Duration;
 use thiserror::Error;
 
 cpp! {{
@@ -120,6 +122,7 @@ pub struct BaguaCommBackend {
     channels: Arc<BaguaCommOpChannels>,
     managed_ptrs: HashSet<u64>,
     comm_worker: std::thread::JoinHandle<()>,
+    comm_monitor: std::thread::JoinHandle<()>,
 }
 
 impl BaguaCommBackend {
@@ -168,6 +171,10 @@ impl BaguaCommBackend {
 
         let channels = Arc::new(BaguaCommOpChannels::new(schedule_channel_cap));
         let channels_clone = channels.clone();
+        let (monitor_op_start_channel_sender, monitor_op_start_channel_receiver) =
+            flume::unbounded();
+        let (monitor_op_finish_channel_sender, monitor_op_finish_channel_receiver) =
+            flume::unbounded();
 
         BaguaCommBackend {
             ordered_buckets: Default::default(),
@@ -190,6 +197,7 @@ impl BaguaCommBackend {
                         "worker received scheduled communication operation {:?}",
                         comm_op
                     );
+                    monitor_op_start_channel_sender.send(comm_op.bucket.clone());
                     for op in &comm_op.ops {
                         op.execute_background_communication(
                             comm_op.bucket.clone(),
@@ -199,6 +207,18 @@ impl BaguaCommBackend {
                     tracing::debug!("comm op executed: {:?}", comm_op);
                     comm_op.event_channel.finish();
                     tracing::debug!("comm op marked finished: {:?}", comm_op);
+                    monitor_op_finish_channel_sender.send(());
+                }
+            }),
+            comm_monitor: std::thread::spawn(move || loop {
+                let op_bucket = monitor_op_start_channel_receiver
+                    .recv()
+                    .expect("monitor cannot receive next comm op bucket");
+                match monitor_op_finish_channel_receiver.recv_timeout(Duration::from_secs(300)) {
+                    Ok(_) => {}
+                    Err(_) => {
+                        panic!("{:?} comm op has not finished for 5 min, panic", op_bucket);
+                    }
                 }
             }),
         }
diff --git a/bagua-core-py/src/lib.rs b/bagua-core-py/src/lib.rs
index de8a6d5..1d9e25a 100644
--- a/bagua-core-py/src/lib.rs
+++ b/bagua-core-py/src/lib.rs
@@ -331,6 +331,14 @@ fn bagua_core(_py: Python, m: &PyModule) -> PyResult<()> {
         .init();
     color_eyre::install().unwrap();
 
+    // panic the whole process when thread panics
+    let orig_hook = std::panic::take_hook();
+    std::panic::set_hook(Box::new(move |panic_info| {
+        // invoke the default handler and exit the process
+        orig_hook(panic_info);
+        std::process::exit(1);
+    }));
+
     m.add_class::<BaguaCommBackendPy>()?;
     m.add_class::<BaguaTensorPy>()?;
     m.add_class::<BaguaBucketPy>()?;