Quick resolution: Stop & Start the instance
For those interested in the whole story …
We had an instance go down and upon logging into the AWS EC2 Management Console, we were confronted with this scarry message
Naturally, we clicked “Troubleshoot”
The Resolution seemed simple enough – Just Stop & Start the instance; however, stopping the instance didn’t seem to work – It just hung at and instance state of “Stopping”
After waiting what seemed an eternity (~45 minute), the instance finally stopped, at which time we were able to start it back up – effectively clearing the issue of the instance being unreachable as well as its retirement.
first thanks for the post it helped me out. However I think it would be worthwhile to add that in my case, restarting the instance also changed the ip address, so people doing this should be aware that they may have to update ip pointers…