Connection getting lost when creating an AMI from an EC2 instance

Question

While creating an Amazon Machine Image (AMI) from an EC2 instance, my Putty Session to the Linux EC2 instance gets terminated why is it so?

Answer 1

AWS powers down the EC2 instance creates an image and then boots the instance back. This is to make sure that the image is healthy and is in a consistent state. Because of the reboot, the network connection is lost and so is the Putty connection. There is a way to avoid reboot while creating an AMI as mentioned in the AWS documentation here. With the no-reboot option the file 
system integrity is not guaranteed.