S3 Bucket created in ap-south-2 location is breaking s3 client command

[eldos-dl]

Describe the bug

The following code is giving error for buckets in ap-south-2 region

import boto3
client = session.client('s3')
client.list_objects_v2(Bucket=bucket_name)

Expected Behavior

We should be able to get normal response based on bucket contents, provided user has permissions.

Current Behavior

Getting the following error:
ClientError: An error occurred (IllegalLocationConstraintException) when calling the ListObjectsV2 operation: The ap-south-2 location constraint is incompatible for the region specific endpoint this request was sent to.

Reproduction Steps

Create a bucket in ap-south-2, Hyderabad region. And try to access it programmatically with boto3

Possible Solution

Add ap-south-2 to the validation

Additional Information/Context

No response

SDK version used

boto3==1.28.85

Environment details (OS name and version, etc.)

Linux/6.2.0-36-generic exe/x86_64.ubuntu.22 prompt/off

[tim-finnigan]

Hi @eldos-dl thanks for reaching out. I commented here on the other issue you just opened: aws/aws-cli#8326 (comment). As mentioned there, you'll need to set the region name to ap-south-2 in order to correctly route the request. For example:

import boto3
client = boto3.client('s3', region_name='ap-south-2')
client.list_objects_v2(Bucket='bucket-name')

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[eldos-dl]

@tim-finnigan So for opt-in regions like ap-south-2, it is mandatory to mention region_name while creating the client, unlike buckets in other regions where it is automatically inferred?