Check the health of your Network Load Balancer targets
You can check the health status of the targets registered with your target groups. For help with health check failures, see Troubleshooting: A registered target is not in service.
Target states and reason codes
The following list shows the possible reason codes for each target state.
- Target state is healthy
-
A reason code is not provided.
- Target state is initial
-
-
Elb.RegistrationInProgress
- The target is in the process of being registered with the load balancer. -
Elb.InitialHealthChecking
- The load balancer is still sending the target the minimum number of health checks required to determine its health status.
-
- Target state is unhealthy
-
-
Target.FailedHealthChecks
- The load balancer received an error while establishing a connection to the target or the target response was malformed.
-
- Target state is unused
-
-
Target.NotRegistered
- The target is not registered with the target group. -
Target.NotInUse
- The target group is not used by any load balancer or the target is in an Availability Zone that is not enabled for its load balancer. -
Target.InvalidState
- The target is in the stopped or terminated state. -
Target.IpUnusable
- The target IP address is reserved for use by a load balancer.
-
- Target state is draining
-
-
Target.DeregistrationInProgress
- The target is in the process of being deregistered and the deregistration delay period has not expired.
-
- Target state is unavailable
-
-
Elb.InternalError
- Target health is unavailable due to an internal error.
-