diff --git a/Plugins/mongodb.go b/Plugins/mongodb.go
index a691457..8484036 100644
--- a/Plugins/mongodb.go
+++ b/Plugins/mongodb.go
@@ -34,6 +34,9 @@ func MongodbUnauth(info *common.HostInfo) (flag bool, err error) {
 	}
 	buf := make([]byte, 1024)
 	err = conn.SetReadDeadline(time.Now().Add(time.Duration(info.Timeout)*time.Second))
+	if err != nil {
+		return flag, err
+	}
 	count, err := conn.Read(buf)
 	if err != nil {
 		return flag, err
@@ -45,6 +48,9 @@ func MongodbUnauth(info *common.HostInfo) (flag bool, err error) {
 			return flag, err
 		}
 		err = conn.SetReadDeadline(time.Now().Add(time.Duration(info.Timeout)*time.Second))
+		if err != nil {
+			return flag, err
+		}
 		count, err := conn.Read(buf)
 		if err != nil {
 			return flag, err