const { promisify } = require('util');
const index = require('../../../index');

//get caching data in redis
const redisGet = async(key) => {
    const getAsync = promisify(index.clientRedis.get).bind(index.clientRedis);            
    const value = await getAsync(key);

    return value;
}

module.exports = redisGet;

My "redisGet" function return right value at the first time, and later times, it only return "null" although the caching data is still exist.

const cachingData = await redisGet('key');//first time: cachingData = <right value>//later times: cachingData = null

How can I fix it ?

Hope for solutions. Thanks all !