springboot使用lettuce做redis客户端，一段时间后command timed out

Question

使用的springboot包是2.2.1，lettuce是5.2.1

yml相关配置

 redis:
    database: 0
    host: 
    port: 6379
    password: 
    timeout: 5000
    lettuce:
      pool:
        max-active: 8
        max-wait: -1
        max-idle: 8
        min-idle: 0

服务器中redis相关配置

# Close the connection after a client is idle for N seconds (0 to disable)
timeout 0

# TCP keepalive.
#
# If non-zero, use SO_KEEPALIVE to send TCP ACKs to clients in absence
# of communication. This is useful for two reasons:
#
# 1) Detect dead peers.
# 2) Take the connection alive from the point of view of network
#    equipment in the middle.
#
# On Linux, the specified value (in seconds) is the period used to send ACKs.
# Note that to close the connection the double of the time is needed.
# On other kernels the period depends on the kernel configuration.
#
# A reasonable value for this option is 300 seconds, which is the new
# Redis default starting with Redis 3.2.1.
tcp-keepalive 0

################################# GENERAL #####################################

# By default Redis does not run as a daemon. Use 'yes' if you need it.
# Note that Redis will write a pid file in /var/run/redis.pid when daemonized.
daemonize no

这里我把keepalive也设置成0了，但是之前默认的300也不行，就项目刚启动的时候能连，我跑了个定时任务，5分钟执行一次，第二次他就超时了

org.springframework.dao.QueryTimeoutException: Redis command timed out; nested exception is io.lettuce.core.RedisCommandTimeoutException: Command timed out after 5 second(s)

Answer 1

发现一个问题，我本来是用定时任务来取redis里面的数据的，5分钟一次，只有项目刚启动的那一次可以连接，后面的基本都command timed out after xx seconds了。
但是我把定时任务改成了一分钟一次的话，他就一直不会断。看来太久不操作之后他会自动断掉，而且不会重新连接。有什么办法可以解决吗

Answer 2

换成jedis吧，我记得原先也遇到过这个问题，没有解决，最后换掉后没有再出现此问题。

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可能和网络有关，大体可参考：

• springboot整合redis使用Lettuceke客户端超时问题
• 解决io.lettuce.core.RedisCommandTimeoutException: Command timed out, mysql 访问15分钟阻塞等待