解决Redis长时间连接断开问题（redis长时间连接断开）

Redis is an open-source, in-memory database widely used for data storage and caching. Redis is the most popular and highly-scaleable caching solution that provides persistent storage, elastic scalability, and high avlability. But sometimes users may face the issue that Redis keeps disconnecting after long running time. In this article, we will explore the underlying reason of Redis disconnecting and how to fix it.

The mn cause of Redis disconnecting after long running time is due to the inactivity timeout setting. Redis has an inactivity timeout setting which is set to “timeout after no.” This means that Redis will automatically disconnect after a certn period of time without any activity.

Fortunately, there are a few solutions to fix the problem. The first solution is to simply increase the inactivity timeout for Redis in the configuration file. You can increase the value to some higher number of seconds, such as 60 or even higher. This will prevent Redis from disconnecting due to inactivity.

The second solution is to use an automated script to reconnect to Redis if it disconnects due to inactivity. The script can be programmed to detect when Redis has been disconnected and then reconnect to it after a few seconds. Here’s an example:

#!/bin/bash 
 
# Script to reconnect to Redis if it disconnects due to inactivity 
 
while : 
do 
  if [[ $(redis-cli ping) == "PONG" ]]; then 
    echo "Redis is still connected, sleeping for 5 minutes" 
    sleep 300 
  else 
    echo "Reconnecting to Redis"
    redis-cli-reconnect 
  fi 
done 

The third solution is to use a tool such as Redis Sentinel to test for connectivity and automatically reconnect if it is disconnected. Redis Sentinel is a high-avlability solution that monitors your redis instance and automatically reconnects if it’s disconnected.

In conclusion, Redis keeps disconnecting after long running time can be fixed by increasing the inactivity timeout for Redis in the configuration file, using an automated script to reconnect to Redis if it disconnects due to inactivity, and/or using Redis Sentinel to automate the process.