brankogrb-db opened a new pull request, #752:
URL: https://github.com/apache/arrow-rs-object-store/pull/752

   ## Summary
   
   `resolve_bucket_region` unconditionally uses virtual-hosted-style URLs 
(`{bucket}.s3.amazonaws.com`). When the bucket name contains dots, this 
produces a hostname that doesn't match S3's `*.s3.amazonaws.com` wildcard TLS 
certificate (wildcards only cover a single DNS label), causing the TLS 
handshake to fail.
   
   This PR falls back to path-style (`s3.amazonaws.com/{bucket}`) when the 
bucket name contains a dot — the same heuristic the official AWS SDKs use.
   
   Closes #747


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