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  6. Why Do Instances in an AS Group Frequently Fail Health Checks and Are Deleted And Then Created Repeatedly?

Why Do Instances in an AS Group Frequently Fail Health Checks and Are Deleted And Then Created Repeatedly?

The security group rule of the instance must allow communication with the 100.125.0.0/16 network, and the protocol and port number must be the same as those used by ELB for health checks. Otherwise, the health check will fail. As a result, the instances will be deleted and created again and again.