OliLay commented on code in PR #43096:
URL: https://github.com/apache/arrow/pull/43096#discussion_r1721912106
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cpp/src/arrow/filesystem/azurefs.cc:
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@@ -1066,20 +1121,114 @@ class ObjectAppendStream final : public
io::OutputStream {
// flush. This also avoids some unhandled errors when flushing in the
destructor.
return Status::OK();
}
- return CommitBlockList(block_blob_client_, block_ids_,
commit_block_list_options_);
+
+ Future<> pending_blocks_completed;
+ {
+ std::unique_lock<std::mutex> lock(upload_state_->mutex);
+ pending_blocks_completed = upload_state_->pending_blocks_completed;
+ }
+
+ RETURN_NOT_OK(pending_blocks_completed.status());
Review Comment:
Because we can not hold the lock while waiting for the future. Another
instance will acquire the lock and mark the future as completed while we wait
on the future.
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