AWS ECS Task Failing

Start with the task stop reason, then follow the container startup path.

Diagnose

• Inspect ECS task and container stop reasons.
• Check application logs before changing infrastructure.
• Verify image, command, environment, secrets, and IAM role.
• Validate network access to dependencies.
• Check container health checks and deployment configuration.
• If capacity is involved, inspect the underlying compute and scheduling signals.

Fix → Verify → Prevent

Make the smallest confirmed correction, redeploy, and observe the service through a complete deployment cycle. Keep stop reasons and rollback steps in the operational runbook.