Command still hasn't been written into connection! Increase nettyThreads and/or retryInterval settings

We are experiencing the error what seems like network related errors using the 3.13.2 version of redisson.

Caused by: org.redisson.client.RedisTimeoutException: Command still hasn't been written into connection! Increase nettyThreads and/or retryInterval settings. Payload size in bytes: 0. Node source: NodeSource [slot=0, addr=null, redisClient=null, redirect=null, entry=null], connection: RedisConnection@1897737917 [redisClient=[addr=redis://10.0.2.185:6379], channel=[id: 0xcfc764bc, L:/172.xx.xx.xx:36380 - R:/10.0.2.185:6379], currentCommand=CommandData [promise=RedissonPromise [promise=ImmediateEventExecutor$ImmediatePromise@7fdadeee(failure: java.util.concurrent.CancellationException)], command=(GET), params=[[115, 101, 114, 118, 105, 99, 101, 58, 109, 101, ...]], codec=org.redisson.client.codec.ByteArrayCodec]], command: (GET), params: [[115, 101, 114, 118, 105, 99, 101, 58, 109, 101, ...]] after 3 retry attempts
at org.redisson.command.RedisExecutor$2.run(RedisExecutor.java:200)
at io.netty.util.HashedWheelTimer$HashedWheelTimeout.expire(HashedWheelTimer.java:672)
at io.netty.util.HashedWheelTimer$HashedWheelBucket.expireTimeouts(HashedWheelTimer.java:747)
at io.netty.util.HashedWheelTimer$Worker.run(HashedWheelTimer.java:472)
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
... 1 common frames omitted

config:

nettyThreads: 32
retryInterval: 1.5s

We run code in the docker of rancher, then have been occurred on some pods. so confused am I.