mapleFU commented on code in PR #38885:
URL: https://github.com/apache/arrow/pull/38885#discussion_r1405438656
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cpp/src/arrow/dataset/dataset_writer.cc:
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@@ -621,11 +621,18 @@ class DatasetWriter::DatasetWriterImpl {
backpressure = writer_state_.open_files_throttle.Acquire(1);
if (!backpressure.is_finished()) {
EVENT_ON_CURRENT_SPAN("DatasetWriter::Backpressure::TooManyOpenFiles");
+
writer_state_.rows_in_flight_throttle.Release(next_chunk->num_rows());
RETURN_NOT_OK(TryCloseLargestFile());
break;
}
}
- RETURN_NOT_OK(dir_queue->StartWrite(next_chunk));
+ auto s = dir_queue->StartWrite(next_chunk);
+ if (!s.ok()) {
+ // If `StartWrite` succeeded, it will Release the
+ // `rows_in_flight_throttle` when the write task is finished.
+ writer_state_.rows_in_flight_throttle.Release(next_chunk->num_rows());
Review Comment:
I'm considering should I release `open_files_throttle` here, I gothrough the
impl, seems that `OpenFileQueue` would not failed, so I didn't release
`open_files_throttle`
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