Status: IN
ECS `StopTask` sends SIGTERM (or custom STOPSIGNAL) to containers with a 30-second grace period, then SIGKILL if the container hasn't exited; the timeout is configurable via `ECS_CONTAINER_STOP_TIMEOUT` agent variable.
Source: entries/2026/03/11/AmazonECS-latest-APIReference-API_StopTaskhtml.md