Redisson client ; RedisTimeoutException issue

I am using Google cloud managed redis cluster(v5) via redisson(3.12.5)

Following are my SingleServer configurations in yaml file

singleServerConfig:    idleConnectionTimeout: 10000    connectTimeout: 10000    timeout: 3000    retryAttempts: 3    retryInterval: 1500    password: null    subscriptionsPerConnection: 5    clientName: null    address: "redis://127.0.0.1:6379"    subscriptionConnectionMinimumIdleSize: 1    subscriptionConnectionPoolSize: 50    connectionMinimumIdleSize: 40    connectionPoolSize: 250    database: 0    dnsMonitoringInterval: 5000threads: 0nettyThreads: 0codec: !<org.redisson.codec.JsonJacksonCodec> {}

I am getting following exceptions when I increase the load on my application

org.redisson.client.RedisTimeoutException: Unable to acquire connection! Increase connection pool size and/or retryInterval settings Node source: NodeSource org.redisson.client.RedisTimeoutException: Command still hasn't been written into connection! Increase nettyThreads and/or retryInterval settings. Payload size in bytes: 34. Node source: NodeSource 

It seems there is no issue on redis cluster and i think i need to make tweaking in my client side redis connection pooling confs(mentioned above) to make it work.

Please suggest me the changes i need to make in my confs

I am also curious if I should close the Redis connection after making get/set calls. I have tried finding this but found nothing conclusive on how to close Redis connections

One last thing that I want to ask is that is there any mechanism to get Redis connection pool stats(active connection, idle connection etc ) in Redisson

Edit1:

I have tried by changing values following values in 3 different iterations

Iteration 1:

 idleConnectionTimeout: 30000 connectTimeout: 30000 timeout: 30000

Iteration 2:

nettyThreads: 0

Iteration 3:

connectionMinimumIdleSize: 100connectionPoolSize: 750

I have tried these things but nothing has worked for me

Any help is appreciated.

Thanks in advance