protocols/kad/query/disjoint: Log number finished on finish_paths

protocols/kad/src/query/peers/closest/disjoint.rs

@@ -21,6 +21,7 @@
 use super::*;
 use crate::kbucket::{Key, KeyBytes};
 use libp2p_core::PeerId;
+use log::debug;
 use std::{
     collections::HashMap,
     iter::{Cycle, Map, Peekable},
@@ -276,11 +277,19 @@ impl ClosestDisjointPeersIter {
     where
         I: IntoIterator<Item = PeerId>
     {
+        let mut count = 0;
+
         for peer in peers {
+            count += 1;
             if let Some(PeerState{ initiated_by, .. }) = self.contacted_peers.get_mut(&peer) {
                 self.iters[*initiated_by].finish();
             }
         }
+
+        debug!("Finished {} out of {} paths.", count, self.iters.len());
+        if self.is_finished() {
+            debug!("All paths finished.");
+        }
     }
 
     /// Immediately transitions the iterator to [`PeersIterState::Finished`].