Occasionally, Amazon cannot shut down an instance when a termination request is made. If this happens, you get a “Termination Failed” message.
The Instances list on the Environment page shows “Termination Failed” for one or more instances.
To resolve a Termination Failed error
Do one of the following:
Click Retry to try again to terminate the instance. If the instance does not terminate within 10 minutes, you see another “Termination Failed” message.
Click Force to force-terminate the instance.
Important! If you select Force, the termination snapshot might not be good. If you later boot a cluster and use a “force-terminated” snapshot for the application instance, make sure to test the instance.