1. 确认AWS CDK设置中是否正确配置了Cluster和Launch Configuration。
2. 检查在Cluster中是否已经启动了ECS Agent，如果没有启动则需要手动启动。
3. 确认在Cluster中是否正确配置了Auto Scaling Group，以确保有足够的容器实例可用。
4. 检查在Cluster中用于创建容器的AMI是否正确配置了ECS Agent。
5. 确认在代码中是否正确设置了Cluster和Task Definition，以及是否正确调用了ECS的API。

代码示例：

import * as cdk from 'aws-cdk-lib';
import * as ecs from 'aws-cdk-lib/aws-ecs';

const app = new cdk.App();
const stack = new cdk.Stack(app, 'MyStack');

const myCluster = new ecs.Cluster(stack, 'myCluster', {
  clusterName: 'my-cluster'
});

// Create a Task Definition
const taskDefinition = new ecs.TaskDefinition(stack, 'myTaskDefinition', {
  compatibility: ecs.Compatibility.EC2,
  family: 'my-task-family',
  networkMode: ecs.NetworkMode.AWS_VPC
});

// Create a Container Definition
const containerDefinition = taskDefinition.addContainer('myContainer', {
  image: ecs.ContainerImage.fromRegistry('amazon/amazon-ecs-sample'),
  memoryLimitMiB: 512
});

// Create a Service
const service = new ecs.Ec2Service(stack, 'myService', {
  cluster: myCluster,
  taskDefinition: taskDefinition
});