CAL Data Hub 2.6 instance sporadically down but EC2 instance running

Hi folks!

We are using Data Hub 2.6 trial instance on CAL but sporadically the instance become not accessible even the EC2 instances are running.

Therefore we were wondering there should be some issue/bug for the CAL image of Data Hub 2.6.

(Usually restarting instances resolve this situation)

Anybody aware those situation ?

How can we find root cause for this kind of situation. Specific log to check on Kubernetes cluster ?