pitrou commented on code in PR #41564:
URL: https://github.com/apache/arrow/pull/41564#discussion_r1603510809
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cpp/src/arrow/filesystem/s3fs.cc:
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@@ -1768,40 +1846,77 @@ class ObjectOutputStream final : public
io::OutputStream {
}
// Wait for background writes to finish
std::unique_lock<std::mutex> lock(upload_state_->mutex);
- return upload_state_->pending_parts_completed;
+ return upload_state_->pending_uploads_completed;
}
// Upload-related helpers
Status CommitCurrentPart() {
+ if (!is_multipart_created_) {
+ RETURN_NOT_OK(CreateMultipartUpload());
+ }
+
ARROW_ASSIGN_OR_RAISE(auto buf, current_part_->Finish());
current_part_.reset();
current_part_size_ = 0;
return UploadPart(buf);
}
- Status UploadPart(std::shared_ptr<Buffer> buffer) {
- return UploadPart(buffer->data(), buffer->size(), buffer);
+ Status UploadUsingSingleRequest() {
+ std::shared_ptr<Buffer> buf;
+ if (current_part_ == nullptr) {
+ // In case the stream is closed directly after it has been opened
without writing
+ // anything, we'll have to create an empty buffer.
+ buf = Buffer::FromVector<uint8_t>({});
Review Comment:
Nit, but `std::make_shared<Buffer>("", 0)` looks simpler to me.
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