pitrou commented on a change in pull request #8941:
URL: https://github.com/apache/arrow/pull/8941#discussion_r545162804
##########
File path: cpp/src/arrow/filesystem/s3fs.cc
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@@ -1241,6 +1245,13 @@ class S3FileSystem::Impl {
return std::string(FromAwsString(builder_.config().region));
}
+ template <typename Error>
+ void SaveBackend(const Aws::Client::AWSError<Error>& error) {
+ if (!backend_ || *backend_ == S3Backend::Other) {
Review comment:
Not necessarily, but if the backend was already detected, we probably
don't want to undo the detection if the HTTP header sometimes misses or is
incorrect.
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