diff --git a/crawler/discovery/discovery-crawler.go b/crawler/discovery/discovery-crawler.go
index 94b771a..d8cf081 100644
--- a/crawler/discovery/discovery-crawler.go
+++ b/crawler/discovery/discovery-crawler.go
@@ -16,7 +16,7 @@ func (c *DiscoveryCrawler) String() string {
 	return "Discovery"
 }
 
-func (c *DiscoveryCrawler) Auth(auth map[string]string) error {
+func (c *DiscoveryCrawler) Auth(auth map[string]interface{}) error {
 	return nil
 }
 
diff --git a/service/DiscoveryService.go b/service/DiscoveryService.go
index e0259ee..36e0a69 100644
--- a/service/DiscoveryService.go
+++ b/service/DiscoveryService.go
@@ -5,6 +5,8 @@ import (
 	"reflect"
 	"sync"
 
+	"git.loafle.net/commons/logging-go"
+
 	cda "git.loafle.net/commons/di-go/annotation"
 	cdr "git.loafle.net/commons/di-go/registry"
 	ocdm "git.loafle.net/overflow/commons-go/discovery/model"
@@ -126,8 +128,10 @@ func (s *DiscoveryService) handleDiscovery(requesterID string, discoveryFunc fun
 			}
 			switch data.Type {
 			case discoverer.DiscoveryDataTypeStart:
+				logging.Logger().Debugf("DiscoveryService.DiscoveryStart")
 				s.ProbeService.Send("DiscoveryService.DiscoveryStart", requesterID, data.Time)
 			case discoverer.DiscoveryDataTypeStop:
+				logging.Logger().Debugf("DiscoveryService.DiscoveryStop")
 				s.ProbeService.Send("DiscoveryService.DiscoveryStop", requesterID, data.Time)
 				data.Release()
 				return nil