Amazon ECS service unhealthy event messages

The following are examples of service unhealthy event messages.

EC2: (service service-name) (task task-id) (instance instance-id) (port port-number) is unhealthy in (target-group target-group-name) due to (reason failure-reason)

This message indicates that a task running on an EC2 instance is failing health checks. For more information, see the following:

• How do I get my Amazon ECS tasks that use the Amazon EC2 launch type to pass the Application Load Balancer health check?

EC2 with taskSet: (service service-name, taskSet taskSet-id) (task task-id) (instance instance-id) (port port-number) is unhealthy in (target-group target-group-name) due to (reason failure-reason)

This message indicates that a task in a task set running on an EC2 instance is failing health checks. For more information, see the following:

• How do I get my Amazon ECS tasks that use the Amazon EC2 launch type to pass the Application Load Balancer health check?

Fargate: (service service-name) (task task-id) (port port-number) is unhealthy in (target-group target-group-name) due to (reason failure-reason)

This message indicates that a Fargate task is failing health checks.

For more information about troubleshooting health check failures in Fargate tasks, see How do I troubleshoot health check failures for Amazon ECS tasks on Fargate?.

Fargate with taskSet: (service service-name, taskSet taskSet-id) (task task-id) (port port-number) is unhealthy in (target-group target-group-name) due to (reason failure-reason)

This message indicates that a task in a task set running on Fargate is failing health checks.

For more information about troubleshooting health check failures in Fargate tasks, see How do I troubleshoot health check failures for Amazon ECS tasks on Fargate?.