CloudWatch Error: Rule JobFailureRule should be created in the scope of a Stack, but no Stack found

Question

I have used below logic in CDK script for setting up Cloudwatch alarm and send SNS notification when there is failure in my glue job but when i tried to do npx synth then it throws error : Error: Rule at '{DVRD replication} JobFailureRule' should be created in the scope of a Stack, but no Stack found.

export interface InfraStackProps extends VpcStackProps {
  stageName?: string;
}

export class InfraStack extends VpcStack {
  constructor(scope: Construct, id: string, props: InfraStackProps ) {
    super(scope, id, props);
    // jobName. This is our AWS Glue script to monitor
    const jobFailedRule = new Rule(scope, '{DVRD replication} JobFailureRule', {
      eventPattern: {
        source: ['aws.glue'],
        detailType: ['Glue Job State Change'],
        detail: {
          state: ['FAILED', 'TIMEOUT', 'ERROR'],
          jobName: ['DVRD replication'],
        },
      },
    })
    
    //cloudwatch metric
    const numFailedJobsMetric = new cloudwatch.Metric({
      namespace: 'AWS/Events',
      metricName: 'TriggeredRules',
      statistic: 'Sum',
      dimensionsMap: {
        RuleName: jobFailedRule.ruleName,
      },
    })
    
    //cloudwatch alarm
    const numFailedJobsAlarm = new cloudwatch.Alarm(scope, '{DVRD replication} numFailedJobsAlarm', {
      metric: numFailedJobsMetric,
      threshold: 1,
      evaluationPeriods: 1,
    });
    
    
    // Adding an SNS action and an email registration 
    const notificationsTopic = new Topic(this, 'Topic'); 
    numFailedJobsAlarm.addAlarmAction(new SnsAction(notificationsTopic));
    notificationsTopic.addSubscription(new EmailSubscription('[email protected]'));

Answer 1

You are passing scope (that was passed when the Stack was instantiated) instead of this (the Stack itself) as the scope when creating your constructs. This is incorrect - when creating constructs in a stack, you should pass the stack itself (passing this is the correct option in 99% of cases).

I'm guessing scope is actually a CDK App.

Change scope to this and it should work.