diff --git a/p2p/discover/portal_protocol.go b/p2p/discover/portal_protocol.go
index 66537aecd8..b0b1c7f858 100644
--- a/p2p/discover/portal_protocol.go
+++ b/p2p/discover/portal_protocol.go
@@ -1473,8 +1473,14 @@ func (p *PortalProtocol) contentLookupWorker(n *enode.Node, contentKey []byte, r
 	wrapedNode := make([]*node, 0)
 	flag, content, err := p.findContent(n, contentKey)
 	if err != nil {
+		p.Log.Error("contentLookupWorker failed", "ip", n.IP().String(), "err", err)
 		return nil, err
 	}
+	p.Log.Debug("contentLookupWorker reveice response", "ip", n.IP().String(), "flag", flag)
+	// has find content
+	if len(resChan) > 0 {
+		return []*node{}, nil
+	}
 	switch flag {
 	case portalwire.ContentRawSelector, portalwire.ContentConnIdSelector:
 		content, ok := content.([]byte)
@@ -1609,6 +1615,12 @@ func (p *PortalProtocol) traceContentLookupWorker(n *enode.Node, contentKey []by
 	if err != nil {
 		return nil, err
 	}
+	p.Log.Debug("traceContentLookupWorker reveice response", "ip", n.IP().String(), "flag", flag)
+	// has find content
+	if len(resChan) > 0 {
+		return []*node{}, nil
+	}
+
 	switch flag {
 	case portalwire.ContentRawSelector, portalwire.ContentConnIdSelector:
 		content, ok := content.([]byte)