UPSTREAM_NOT_FOUND [519] How do I fix the problem?


Unable to connect to or maintain connection with an instance due to an error. If this instance just started, please try again in 1-2 minutes.


AWS Lightsail is turning an instance, and continues to turn the puser on top of the instance. However, the error UPSTREAM_NOT_FOUND [519] continues to occur. Switching the instance window back and forth several times does not resolve the issue.

Please give me some advice on how to solve it.

asked 9 months ago176 views
1 Answer


Please check the document below, which describes how to troubleshoot the error.
In my experience, sshd did not start and connection failed.

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answered 9 months ago

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