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/EC2 Instance became unresponsive and SSH failed until restart/

EC2 Instance became unresponsive and SSH failed until restart

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Our EC2 instance (US-West-2) became unresponsive, web traffic failed to connect, and I could not SSH into the server.

After shutting down and then launching the instance again activity and access have returned to normal, but I would like to know the cause so this doesn't happen again in the future.

I have checked the syslog files but there was nothing obvious logged that would have caused the issue

Any advice would be much appreciated

The instance_id: i-0d2dc06a6d078f519

The instance type is: c5a.2xlarge

1 Answers
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If this problem reoccurs you might also try accessing the instance using the EC2 Serial Console. Another place to check is CloudWatch Metrics to see what the CPU usage is - there could have been a runaway process.

Otherwise, in cases like this I always recommend creating a support case and talking to the team about what the root causes may have been.

EXPERT
answered 2 months ago

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