diff --git a/examples/raft-kv-memstore/src/client.rs b/examples/raft-kv-memstore/src/client.rs
index f730794ae..9bc817aac 100644
--- a/examples/raft-kv-memstore/src/client.rs
+++ b/examples/raft-kv-memstore/src/client.rs
@@ -170,7 +170,7 @@ impl ExampleClient {
         }
         .send();
 
-        let res = timeout(Duration::from_millis(500), fu).await;
+        let res = timeout(Duration::from_millis(3_000), fu).await;
         let resp = match res {
             Ok(x) => x.map_err(|e| RPCError::Network(NetworkError::new(&e)))?,
             Err(timeout_err) => {
diff --git a/examples/raft-kv-memstore/src/lib.rs b/examples/raft-kv-memstore/src/lib.rs
index 7939b102a..f42b28922 100644
--- a/examples/raft-kv-memstore/src/lib.rs
+++ b/examples/raft-kv-memstore/src/lib.rs
@@ -36,7 +36,14 @@ pub type ExampleRaft = Raft<ExampleTypeConfig, ExampleNetwork, Arc<ExampleStore>
 
 pub async fn start_example_raft_node(node_id: ExampleNodeId, http_addr: String) -> std::io::Result<()> {
     // Create a configuration for the raft instance.
-    let config = Arc::new(Config::default().validate().unwrap());
+    let config = Config {
+        heartbeat_interval: 500,
+        election_timeout_min: 1500,
+        election_timeout_max: 3000,
+        ..Default::default()
+    };
+
+    let config = Arc::new(config.validate().unwrap());
 
     // Create a instance of where the Raft data will be stored.
     let store = Arc::new(ExampleStore::default());
diff --git a/openraft/src/core/raft_core.rs b/openraft/src/core/raft_core.rs
index aec5ac483..b0921b7a5 100644
--- a/openraft/src/core/raft_core.rs
+++ b/openraft/src/core/raft_core.rs
@@ -1408,8 +1408,8 @@ impl<C: RaftTypeConfig, N: RaftNetworkFactory<C>, S: RaftStorage<C>> RaftCore<C,
 
         if session_id.membership_log_id != self.engine.state.membership_state.effective.log_id {
             tracing::warn!(
-                "membership_log_id changed: msg sent by: {:?}; curr: {}; ignore when ({})",
-                session_id.membership_log_id,
+                "membership_log_id changed: msg sent by: {}; curr: {}; ignore when ({})",
+                session_id.membership_log_id.summary(),
                 self.engine.state.membership_state.effective.log_id.summary(),
                 msg
             );