Calls to the STS client to assume a role during Lambda execution silently fail

[revanshine]

Expected Behavior

The following Lambda typescript code should work even when the DD instrumentation and layer have been enabled. Variables assumeRoleArn and region are set higher up in the execution.

  console.log("assumeRoleArn 👉", JSON.stringify(assumeRoleArn, null, 2));

  const stsClient = new STSClient({ region: region });
  const stsCommand = new AssumeRoleCommand({
    RoleArn: assumeRoleArn,
    RoleSessionName: "MySession",
  });

  const stsResponse = await stsClient.send(stsCommand);
  console.log(
    `${region} httpStatusCode 👉`,
    stsResponse.$metadata.httpStatusCode
  );

Actual Behavior

This STS code between the two log statements fails without any indication of why. Log level DEBUG doesn't provide any clue either.

Steps to Reproduce the Problem

1. Configure an IAM role that your Lambda can use to perform hypothetical work, and use code like I've provided above to assume that role during Lambda execution (assuming a role is required for tasks that can be cross-region and/or cross account, but this fails even when performing the work in one region/account).
2. Test your code without the DD instrumentation to be sure it works as expected. You should see that "httpStatusCode" in your CloudWatch logs.
3. Add the Datadog construct to your CDK stack and enable it for your Lambda. Set nodeLayerVersion: 106.

    const datadog = new Datadog(this, "Datadog", {
      nodeLayerVersion: 106,
    });
    datadog.addLambdaFunctions([myNodeJsFunction]);

4. Test your Lambda again, observe that the code never makes it to the log statement for the "httpStatusCode".

Specifications

• Datadog Lambda Layer version: 106
• Node version: 18

Trace

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}

[zARODz11z]

Hi @revanshine, I attempted to reproduce but was unsuccessful, I followed this video to configure the role, may you try following that and see if it resolves your issues?

[revanshine]

Our code works fine without the DD instrumentation.