pitrou commented on code in PR #14601:
URL: https://github.com/apache/arrow/pull/14601#discussion_r1019246048


##########
cpp/src/arrow/filesystem/s3fs.cc:
##########
@@ -2303,10 +2303,14 @@ Result<FileInfo> S3FileSystem::GetFileInfo(const 
std::string& s) {
     auto outcome = impl_->client_->HeadBucket(req);
     if (!outcome.IsSuccess()) {
       if (!IsNotFound(outcome.GetError())) {
-        return ErrorToStatus(
-            std::forward_as_tuple("When getting information for bucket '", 
path.bucket,
-                                  "': "),
-            "HeadBucket", outcome.GetError());
+        auto msg = "When getting information for bucket '" + path.bucket + "': 
";
+        // Bucket exists, but failed to call HeadBucket, perhaps wrong region?
+        ARROW_ASSIGN_OR_RAISE(auto region, 
impl_->client_->GetBucketRegion(path.bucket));

Review Comment:
   "UNKNOWN" is not really specific enough. However, the HTTP status code may 
be a better clue.



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