fix(node): periodic replicate shall have a wider range

ant-networking/src/cmd.rs

@@ -1133,11 +1133,18 @@ impl SwarmDriver {
     }
 
     // Replies with in-range replicate candidates
-    // Fall back to CLOSE_GROUP_SIZE peers if range is too narrow.
+    // Fall back to expected_candidates peers if range is too narrow.
     // Note that:
-    //   * For general replication, replicate candidates shall be the closest to self
+    //   * For general replication, replicate candidates shall be closest to self, but with wider range
     //   * For replicate fresh records, the replicate candidates shall be the closest to data
     pub(crate) fn get_replicate_candidates(&mut self, target: &NetworkAddress) -> Vec<PeerId> {
+        let is_periodic_replicate = target.as_peer_id().is_some();
+        let expected_candidates = if is_periodic_replicate {
+            CLOSE_GROUP_SIZE + 2
+        } else {
+            CLOSE_GROUP_SIZE
+        };
+
         // get closest peers from buckets, sorted by increasing distance to the target
         let kbucket_key = target.as_kbucket_key();
         let closest_k_peers: Vec<PeerId> = self
@@ -1158,15 +1165,15 @@ impl SwarmDriver {
         {
             let peers_in_range = get_peers_in_range(&closest_k_peers, target, responsible_range);
 
-            if peers_in_range.len() >= CLOSE_GROUP_SIZE {
+            if peers_in_range.len() >= expected_candidates {
                 return peers_in_range;
             }
         }
 
-        // In case the range is too narrow, fall back to at least CLOSE_GROUP_SIZE peers.
+        // In case the range is too narrow, fall back to at least expected_candidates peers.
         closest_k_peers
             .iter()
-            .take(CLOSE_GROUP_SIZE)
+            .take(expected_candidates)
             .cloned()
             .collect()
     }