[Bug] MSK Replicator fails topic list updates for self managed clusters

Author: mmehrtenCreated Sep 18, 2026Updated Sep 18, 2026
Labelsbugservice/kafkaneeds-triage

Terraform and AWS Provider Version

bash
v6.3.0

Affected Resource(s) or Data Source(s)

  • aws_msk_replicator

Expected Behavior

Updating topics creates consistent MSK Replicator updates.

Actual Behavior

Terraform provider for MSK replicator has a bug. The provider creates errors when updating the list of topics to replicate. The provider does not create a valid UpdateReplicationInfo request when targeting third party clusters.

{
  "sourceKafkaClusterArn": "",
  "targetKafkaClusterArn": "<MSK target ARN>"
}

where sourceKafkaClusterArn should have been populated with our confluent cluster's ID

Relevant Error/Panic Output

bash

Sample Terraform Configuration

Click to expand configuration
hcl

Steps to Reproduce

  1. Create a Replicator
  2. Update topics

Debug Logging

Click to expand log output
bash

GenAI / LLM Assisted Development

n/a

Important Facts and References

No response

Would you like to implement a fix?

No

Source: hashicorp/terraform-provider-aws