Debian 10 AWS EC2 instance hangs randomly
I have 50+ Debian 8/9 EC2 instances running good for years... however, with Debian 10, I've started having trouble lately. I spun a new instance with Debian 10 AMI from marketplace today, configured everything and application side deployment... after an hour or so, the machine just froze, no response on SSH / http / xRDP / VNC ports. Even the AWS internal instance check say 1 of 2 checks failed ... so it is really down.
Out of curiosity, I spun another Deb 10 EC2 ... same t3 small spec instance... just did an apt update / upgrade and left it alone... after a 20 mins or so, this one too is in hung state exactly like the first one.
I have opened a ticket with AWS for this... the first off guy could not help the issue so he said he will call me back with some research with his tech colleague, so awaiting their reply.
I recall having a very similar issue on LightSail in January... Lightsail did not have Deb 10 available so I had to install Deb 9, upgrade to Deb 10 and then I observed it would hang in between after a few hours of idling. Suspecting I missed something during the upgrade I re-made it again and it runs fine till date. Today, when I ran into the same exact behavior, albeit on mainstream AWS, I got suspicious it might have something to do with their AMIs.
The forums are flooded with such reports where EC2 just froze and would not come back until you reboot from AWS console... I checked whatever I could read, like changing security group, checking network, which did not help. I think it is a baseline problem with stability, not just network or anything else.
Anyone else experienced the same issues with Debian 10 on Ec2 lately ?
please share your observations... Thanks