Darksonn commented on code in PR #6449:
URL: https://github.com/apache/arrow-datafusion/pull/6449#discussion_r1208602362
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datafusion/core/src/physical_plan/coalesce_partitions.rs:
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@@ -199,6 +200,25 @@ impl Stream for MergeStream {
cx: &mut std::task::Context<'_>,
) -> Poll<Option<Self::Item>> {
let poll = self.input.poll_recv(cx);
+
+ // If the input stream is done, wait for all tasks to finish and return
+ // the failure if any.
+ if let Poll::Ready(None) = poll {
+ match Box::pin(self.tasks.join_next()).poll_unpin(cx) {
Review Comment:
While I agree that it makes sense to add a `poll_join_next` method, you
don't have to box here. You can use the `pin!` macro instead of boxing.
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