log addr with failures

limiter.go

@@ -12,6 +12,7 @@ import (
 
 type dialResult struct {
 	Conn iconn.Conn
+	Addr ma.Multiaddr
 	Err  error
 }
 
@@ -141,7 +142,7 @@ func (dl *dialLimiter) executeDial(j *dialJob) {
 
 	con, err := dl.dialFunc(j.ctx, j.peer, j.addr)
 	select {
-	case j.resp <- dialResult{Conn: con, Err: err}:
+	case j.resp <- dialResult{Conn: con, Addr: j.addr, Err: err}:
 	case <-j.ctx.Done():
 	}
 }

swarm_dial.go

@@ -318,7 +318,7 @@ func (s *Swarm) dialAddrs(ctx context.Context, p peer.ID, remoteAddrs <-chan ma.
 		case resp := <-respch:
 			active--
 			if resp.Err != nil {
-				log.Info("got error on dial: ", resp.Err)
+				log.Info("got error on dial to %s: ", resp.Addr, resp.Err)
 				// Errors are normal, lots of dials will fail
 				exitErr = resp.Err