diff --git a/backend/database/mongo.go b/backend/database/mongo.go
index e72baeaa..d646285d 100644
--- a/backend/database/mongo.go
+++ b/backend/database/mongo.go
@@ -61,10 +61,36 @@ func InitMongo() error {
 			dialInfo.Password = mongoPassword
 			dialInfo.Source = mongoAuth
 		}
-		sess, err := mgo.DialWithInfo(&dialInfo)
-		if err != nil {
-			return err
+
+		// mongo session
+		var sess *mgo.Session
+
+		// 错误次数
+		errNum := 0
+
+		// 重复尝试连接mongo
+		for {
+			var err error
+
+			// 连接mongo
+			sess, err = mgo.DialWithInfo(&dialInfo)
+
+			if err != nil {
+				// 如果连接错误，休息1秒，错误次数+1
+				time.Sleep(1 * time.Second)
+				errNum++
+
+				// 如果错误次数超过30，返回错误
+				if errNum >= 30 {
+					return err
+				}
+			} else {
+				// 如果没有错误，退出循环
+				break
+			}
 		}
+
+		// 赋值给全局mongo session
 		Session = sess
 	}
 	return nil
diff --git a/backend/model/node.go b/backend/model/node.go
index d662ab6d..2fe810f8 100644
--- a/backend/model/node.go
+++ b/backend/model/node.go
@@ -55,7 +55,7 @@ func GetCurrentNode() (Node, error) {
 	for {
 		// 如果错误次数超过10次
 		if errNum >= 10 {
-			panic("cannot get current node")
+			return node, errors.New("cannot get current node")
 		}
 
 		// 尝试获取节点
diff --git a/docker_init.sh b/docker_init.sh
index 8c256839..97c505dc 100755
--- a/docker_init.sh
+++ b/docker_init.sh
@@ -22,10 +22,5 @@ fi
 # start nginx
 service nginx start
 
-# wait for mongo service to be ready
-#/app/wait-for-it.sh $CRAWLAB_MONGO_HOST:$CRAWLAB_MONGO_PORT
-
-# wait for redis service to be ready
-#/app/wait-for-it.sh $CRAWLAB_REDIS_ADDRESS:$CRAWLAB_REDIS_PORT
-
+# start backend
 crawlab
\ No newline at end of file