在大量写入nutsDB的时候出现NutsDB: Connect Error db.buildIndexes error: when build activeDataIndex readAt err: crc error about nutsdb HOT 7 CLOSED

func connect() (db *nutsdb.DB) {
	var (
		err error
		c   datastruck.Config
	)

	if err = c.Config(); err != nil {
		log.Println(MyERR.ErrorLog(12012), fmt.Sprintf("%v", err))
		return nil,err
	}
	opt := nutsdb.DefaultOptions
	opt.Dir = c.NutsDB.Path

	if db, err = nutsdb.Open(opt); err != nil {
		log.Println(err)
		return nil,err
	}
	return db,nil
}

func Put(bct string, key, val interface{}) error {
	var (
		keyByte, valByte []byte
		err              error
		db               *nutsdb.DB
	)

	if db, err = connect(); err != nil {
		return err
	}

	defer func() {
		_ = db.Close()
	}()

	err = db.Update(
		func(tx *nutsdb.Tx) error {
			//judge key type
			switch key.(type) {
			case string:
				keyByte = []byte(key.(string))
			case int:
				keyByte, _ = IntToBytes(val.(int), 3)
			case []uint8:
				keyByte = key.([]byte)
			}

			switch val.(type) {
			case string:
				valByte = []byte(val.(string))
			case int:
				valByte, _ = IntToBytes(val.(int), 3)
			case []uint8:
				valByte = val.([]byte)
			}
			if err = tx.Put(bct, keyByte, valByte, 0); err != nil {
				return err
			}
			return nil
		})
	if err != nil {
		log.Println("NutsDB PUT ERR",err)
		return err
	}
	return nil
}

	defer func() {
		_ = db.Close()
	}()