Error on first use of S3 Backend

Describe the bug When running for the first time an existing Julie setup, after adding an S3Backend, I get an error that clearly says that the state file doesn’t exist yet in s3.

Error:  2022-03-04 08:43:22.094 [main] S3Backend - software.amazon.awssdk.services.s3.model.NoSuchKeyException: The specified key does not exist. (Service: S3, Status Code: 404, Request ID: XXXXXXX, .....)

To Reproduce Add an S3Backend to a Julie setup that didn’t have one before.

topology.builder.state.processor.class=com.purbon.kafka.topology.backend.S3Backend
julie.s3.region=eu-central-1
julie.s3.bucket=mybucket

Expected behavior The backend should create an initial state based on the Julie config instead of failing to initiate

Additional context This looks similar to the other issue I created with the Redis backend. It doesn’t seem to be able to handle initial run and needs an existing state before it can work https://github.com/kafka-ops/julie/issues/453

[samudurand]

You are very welcome, Julie is a great tool!

[purbon]

I tried with a real S3, with the bucket created, but empty. After the test, no error where spoted and

  aws s3 ls s3://pere.julie.ops
2022-03-25 10:31:18       1199 .cluster-state
 pere@fuchsi  ~/work/gitops/kafka-topology-builder   issue-454 ●✚ 

closing this issue for now, feel free to reopen if necessary.