EC2 instance rebooted unexpectedly



Instance ID: i-0582a28a46a656e64 in ap-northeast-1 rebooted unexpectedly at 2023-02-15 22:15:35 UTC.

$ journalctl --list-boots
-2 f2c39f848342459da7d2a916638583dd Wed 2021-09-01 01:19:10 UTC—Mon 2021-10-18 07:16:17 UTC
-1 bc0fca97974644549d4db7f7400f8191 Mon 2021-10-18 07:16:22 UTC—Wed 2023-02-15 22:06:00 UTC
 0 2821ef65e52940e298c6fa400aef02b7 Wed 2023-02-15 22:15:35 UTC—Thu 2023-02-16 01:34:03 UTC

I checked CloudTrail but could not find any event that looked relevant. Can someone from Amazon check the cause of this reboot?

Thank you.

asked a year ago292 views
1 Answer


It would be recommended to open up a case with AWS Support if at all possible regarding the mentioned EC2 instance so that AWS Support Engineers are able to review your resources in-depth. In general, there is a wide variety of causes for reboots per this knowledge center article.

  • The instance failed one or both of its status checks.
  • The underlying hardware hosting your instance was faulty and Amazon EC2 restarted the instance to move it to new, healthy hardware.
  • Scheduled maintenance occurred on your instance that required a reboot.
  • A user or application inside your server rebooted the instance.
  • A kernel bug. If you encounter a kernel bug, be sure that your kernel is fully updated.

Resolutions and investigative steps are located within the article. This article also exists for Windows instances specifically.

profile pictureAWS
answered a year ago

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