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Current Behavior

Hello,

I'm writing this issue to ask you about about a problem i encounter when using localstack bucket.
I have a scala script i want to use on AWS later, and I need to read a file from a S3 bucket. In my local local version i'm using a localstack container.

However, when running my code, I get an error telling me that the bucket does not exist.

Any ideas about whay I could have done wrong with localstack for that to happen ?

Expected Behavior

I expect the listBuckets method of AmazonS3 to return a Bucket of region that is not null

How are you starting LocalStack?

With a docker-compose file

Steps To Reproduce

# How I create the localstack elems:

I run a container from image localstack/localstack:latest, with the following env variables :

AWS_DEFAULT_REGION: eu-west-1
AWS_ACCESS_KEY_ID: admin
AWS_SECRET_ACCESS_KEY: password

Then, once the container is running, i create a bucket with the following command :
awslocal s3 mb s3://my-bucket --region eu-west-1

How I (try to) access my bucket

In my scala script, I create a AmazonS3 client the following way :

private val s3: AmazonS3 = AmazonS3ClientBuilder
    .standard()
    .withEndpointConfiguration(
      new EndpointConfiguration(endpoint, region)
    )
    .withCredentials(
      new AWSStaticCredentialsProvider(
        new BasicAWSCredentials(accessKeyId, secretAccessKey)
      )
    )
    .build()

// endpoint is "http://localhost:4566"
// region is "eu-west-1"
// accessKeyId is "admin"
// secretAccessKey is "password"

Then, when run s3.listBuckets() i have the following line :
[S3Bucket [name=my-bucket, creationDate=Tue May 06 11:22:21 CEST 2025, owner=S3Owner [name=webfile,id=75aa57f09aa0c8caeab4f8c24e99d10f8e7faeebf76c078efc7c6caea54ba06a], region=null]]

Moreover, running s3.getObject("my-bucket","/path/to/file") tells me that NoSuchBucket

Environment

# Versions

aws-java-sdk-s3 : 1.12.782 (can't upgrade to sdkv2 because bounded by scala version)
localstack image : latest
awslocal cli : latest, installed yesterday (May 5th 2025)

Anything else?

No response