(aws-events-targets): Using an imported DLQ with an event rule target throws Error: Cannot assign Dead Letter Queue in region ${Token[TOKEN.35]} to the rule XYZEventRule89558AAC in region eu-west-1. Both the queue and the rule must be in the same region.

[JeromeGuyon]

Please add your +1 👍 to let us know you have encountered this

Status: RESOLVED

Overview:

All users of aws-events-targets who created a Rule with the SqsQueue target and passed an imported queue to the deadLetterQueue prop would receive an error similar to:

Complete Error Message:

Error: Cannot assign Dead Letter Queue in region ${Token[TOKEN.35]} to the rule XYZEventRule89558AAC in region eu-west-1. Both the queue and the rule must be in the same region.

Workaround:

Solution:

Upgrade to 2.116.0 or higher.

Related Issues:

---

Original report

Describe the bug

Previously (2.95.1), I was able to associate a DLQ to a Rule.

In last version (2.111.0), it is nor more possible :

const failedEventQueue = sqs.Queue.fromQueueArn(
      this,
      "FailedEventsQueue",
      ssm.StringParameter.valueForStringParameter(
        this,
        `xyz/failed-events-queue-arn`
      )
    );
    
eventRule.addTarget(
      new targets.SqsQueue(aQueue, {
        messageGroupId: messageGroupId,
        deadLetterQueue: failedEventQueue,
        maxEventAge: cdk.Duration.seconds(60),
        retryAttempts: 0,
      })
    ); 

Generate

Error: Cannot assign Dead Letter Queue in region ${Token[TOKEN.35]} to the rule XYZEventRule89558AAC in region eu-west-1. Both the queue and the rule must be in the same region.

Expected Behavior

It should be possible to support imported SQS Queue as DLQ.

Current Behavior

Error: Cannot assign Dead Letter Queue in region ${Token[TOKEN.35]} to the rule XYZEventRule89558AAC in region eu-west-1. Both the queue and the rule must be in the same region.

Reproduction Steps

const failedEventQueue = sqs.Queue.fromQueueArn(
      this,
      "FailedEventsQueue",
      ssm.StringParameter.valueForStringParameter(
        this,
        `xyz/failed-events-queue-arn`
      )
    );
    
eventRule.addTarget(
      new targets.SqsQueue(aQueue, {
        messageGroupId: messageGroupId,
        deadLetterQueue: failedEventQueue,
        maxEventAge: cdk.Duration.seconds(60),
        retryAttempts: 0,
      })
    ); 

and in stack
env: { account: process.env.CDK_DEFAULT_ACCOUNT, region: process.env.CDK_DEFAULT_REGION },

Possible Solution

N/A

Additional Information/Context

No response

CDK CLI Version

2.108.0

Framework Version

No response

Node.js Version

v18.13.0

OS

macos

Language

TypeScript

Language Version

TypeScript (5.2.2)

Other information

No response

[pahud]

Is the error message from cloudformation?

Looks like the region of the failedEventQueue can't be resolved.

const failedEventQueue = sqs.Queue.fromQueueArn(
      this,
      "FailedEventsQueue",
      ssm.StringParameter.valueForStringParameter(
        this,
        `xyz/failed-events-queue-arn`
      )
    );

Can you assign a static ARN to failedEventQueue without retrieving from ssm and see if the error still exists?

And, can you confirm if the value is successfully retrieved from the given parameter?

[github-actions]

This issue has not received a response in a while. If you want to keep this issue open, please leave a comment below and auto-close will be canceled.

[sjbthfc2]

I am having the same issue, I have checked that the Rule and Dead Letter Queue are in the same region but I can't resolve this.

[sjbthfc2]

I can confirm that after reverting back to CDK version 2.93.0, it works. Looks like this is a bug with latest version.

[KentarouTakeda]

I also encountered the same problem. The region settings are fine and they are set in stackProps.env.

Node.js: v20.9.0
TypeScript: 5.3.3
CDK: 2.114.1

[JeromeGuyon]

Is the error message from cloudformation?

Looks like the region of the failedEventQueue can't be resolved.

const failedEventQueue = sqs.Queue.fromQueueArn(
      this,
      "FailedEventsQueue",
      ssm.StringParameter.valueForStringParameter(
        this,
        `xyz/failed-events-queue-arn`
      )
    );

Can you assign a static ARN to failedEventQueue without retrieving from ssm and see if the error still exists?

And, can you confirm if the value is successfully retrieved from the given parameter?

Sorry for the delay, :

I tried with const deadLetterQueue = new sqs.Queue( => Working
With const deadLetterQueue = sqs.Queue.fromQueueArn(this,'MyDeadLetterQueue',"arn:aws:sqs:eu-west-1:444455556666:queue1") => Synth fails

issue still exists in 2.114.1

[JeromeGuyon]

last working release : 2.108.1, bug introduced in 2.109.0

Maybe it has been introduced with this PR
633dbe2
#27906

[JeromeGuyon]

With #27906 PR, the region/account is now considered as resolved and are not anymore tokens.

As a workaround, I suggest changing

return [TokenComparison.SAME, TokenComparison.BOTH_UNRESOLVED].includes(Token.compareStrings(dim1, dim2));

to

return [TokenComparison.SAME, TokenComparison.BOTH_UNRESOLVED,, TokenComparison.ONE_UNRESOLVED].includes(Token.compareStrings(dim1, dim2));

[kaizencc]

Looks like a [small] regression we've introduced, so labeling this p0. It isn't going to matter much in terms of priority, as @JeromeGuyon has already created a fix that has been accepted (thanks :)).

[github-actions]

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