使用redisTemplate的scan方式删除批量key问题

	/**
     * 删除指定前缀的一系列key
     *
     * @param pattern 匹配keys的规则
     */
    public void deleteKeysByScan(String pattern) {
        long start = System.currentTimeMillis();
        LOGGER.error("清理{}类外呼记录缓存的定时任务开始执行", pattern);
        String param = pattern + "*";
        Set<String> keys = this.getValuesForStringByScan(param);
        redisTemplate.delete(keys);
        LOGGER.error("清理{}类外呼记录缓存的定时任务执行结束，耗时：{}", pattern, (System.currentTimeMillis() - start));
    }

    /**
     * 获取匹配的所有key，使用scan避免阻塞
     *
     * @param patten 匹配keys的规则
     * @return 返回获取到的keys
     */
    public Set<String> getValuesForStringByScan(String patten) {
        return redisTemplate.execute(connect -> {
            Set<String> binaryKeys = new HashSet<>();
            Cursor<byte[]> cursor = connect.scan(new ScanOptions.ScanOptionsBuilder().match(patten).count(200000).build());
            while (cursor.hasNext() && binaryKeys.size() < 200000) {
                binaryKeys.add(new String(cursor.next()));
            }
            return binaryKeys;
        }, true);
    }

    public void deleteByPrex(String prex) {
        Set<String> keys = redisTemplate.keys(prex);
        if (CollectionUtils.isNotEmpty(keys)) {
            redisTemplate.delete(keys);
        }
    }

redis-cli keys "keys" | xargs redis-cli del