fix path parameter in notify

chord/client.go

@@ -88,14 +88,17 @@ func Stabilize(ctx context.Context, cl Client, n *Node) error {
 	pred, _, err := cl.Neighbors(ctx, n.Successor())
 	if err != nil {
 		// TODO(zeph): replication
-		return err
+		return fmt.Errorf("acquiring successor neighbors for stabilization: %w", err)
 	}
 	if pred.IsValid() && contains(n.self.id, n.Successor().id, pred.id) && pred.id != n.Successor().id {
 		// Shift in the new successor.
 		copy(n.succ[1:], n.succ)
 		n.succ[0] = pred
 	}
-	return cl.Notify(ctx, n, n.Successor())
+	if err := cl.Notify(ctx, n, n.Successor()); err != nil {
+		return fmt.Errorf("notifying successor: %w", err)
+	}
+	return nil
 }
 
 // Notify informs n that p considers n to be p's successor.

chord/httpnode/client.go

@@ -80,7 +80,7 @@ func (cl *Client) Notify(ctx context.Context, n *chord.Node, s chord.Peer) error
 		Scheme:   "http",
 		Host:     addr.String(),
 		Path:     path.Join("/", cl.APIBase, "pred"),
-		RawQuery: url.Values{"s": {self.String()}}.Encode(),
+		RawQuery: url.Values{"p": {self.String()}}.Encode(),
 	}
 	req, err := http.NewRequestWithContext(ctx, "POST", url.String(), nil)
 	if err != nil {