Ec2 instance status check failed

Question

I had an ec2 instance running but suddenly it stopped working one day. When I checked my dashboard,it says 1/2 status check failed and in that it says instance status check failed. (Instance reachability check failed)
I tried all the steps available in the troubleshooting guide like rebooting, checking system logs etc. but it doesn't seem to help me.

May anyone please help me in this regard.

Answer

When you reboot, your instance stays on the same hardware and from AWS point of view keeps running. Reboot is OS reboot.
You could try to STOP and START your instance. This should resolve issues with underlaying AWS hardware. Because at scale, everything fails, all the time ;-) Here is also a good explanation how reboot/stop/termination of instance are different; https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-instance-lifecycle.html

Ec2 instance status check failed

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