iter.Valid() 卡死

[cceessff]

func DeleteCache(prefix string) error {
	fmt.Println("DeleteCache:" + prefix)
	iter, err := db.NewIterator(lotusdb.IteratorOptions{
		Prefix: []byte(prefix),
	})

	if err != nil {
		return err
	}
	fmt.Println("DeleteCache: NewIterator ")

	batch := db.NewBatch(lotusdb.BatchOptions{
		WriteOptions: lotusdb.WriteOptions{
			Sync: false,
		},
	})
	for iter.Valid() {
		fmt.Println("DeleteCache: Valid")
		key := append([]byte(nil), iter.Key()...)
		fmt.Println("DeleteRandHtml=>" + string(key))
		err = batch.Delete(key)
		if err != nil {
			return err
		}
		iter.Next()

	}
	fmt.Println("DeleteCache: 循环完成 ")
	err = batch.Commit()
	if err != nil {
		return err
	}
	err = iter.Close()
	if err != nil {
		return err
	}

	return nil
}

在输出了 DeleteCache: NewIterator 之后程序就卡死了