Instance reachability check failed under Instance status checks

Question

Hello, 
In instance check it shows "Instance reachability check failed". I tried to reboot the instance but still getting the same.

Antonio_Lagrotteria · Accepted Answer

I suggest to look into this: https://repost.aws/knowledge-center/ec2-linux-status-check-failure-os-errors#:~:text=Your%20EC2%20Linux%20instance%20might,network%20configurations%20on%20the%20instance.

Omkar Kadam · Answer

Hi, can you check system logs, and find the root cause for the failed system check?

Usually, it is due to High CPU/Memory Usage (OOM Killer)

You can also try stopping and starting the instance as this will launch it on a separate H/W or cell and this should fix any issue by swapping the underlying instance hardware/resources.

More information can be found on https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/TroubleshootingInstances.html

HTH.

Himani · Answer

I check the system logs, It is showing below lines
1) fail to add MMCONFIG information, can't access extended PCI configuration space under this bridge.
2) [0;1;39mGRUB failed boot detection

Instance reachability check failed under Instance status checks

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