when try to implement an async I/O with Redisson to connect to a Redis cache, Redisson couldn't connect to the server due to

java.net.SocketException: maximum number of DatagramSockets reached

, has anyone ran into this issue and can shed some light?

how big is your thread pool?

how do I check that? I have deployed my Flink app to AWS Managed Flink, not sure if it is pre-set by them or configurable.