diff --git a/common.go b/common.go
index 9edc3b9..71cb4ca 100644
--- a/common.go
+++ b/common.go
@@ -1,6 +1,7 @@
 package cronsun
 
 import (
+	"fmt"
 	"os"
 
 	"github.com/shunfei/cronsun/conf"
@@ -20,22 +21,24 @@ func Init() (err error) {
 
 	// init id creator
 	if err = initID(); err != nil {
-		return
+		return fmt.Errorf("Init UUID Generator faild: %s", err)
 	}
 
 	// init config
 	if err = conf.Init(); err != nil {
-		return
+		return fmt.Errorf("Init Config faild: %s", err)
 	}
 
 	// init etcd client
 	if DefalutClient, err = NewClient(conf.Config); err != nil {
-		return
+		return fmt.Errorf("Connect to ETCD %s faild: %s",
+			conf.Config.Etcd.Endpoints, err)
 	}
 
 	// init mongoDB
 	if mgoDB, err = db.NewMdb(conf.Config.Mgo); err != nil {
-		return
+		return fmt.Errorf("Connect to MongoDB %s faild: %s",
+			conf.Config.Mgo.Hosts, err)
 	}
 
 	_Uid = os.Getuid()