alamb commented on code in PR #6449:
URL: https://github.com/apache/arrow-datafusion/pull/6449#discussion_r1212358351
##########
datafusion/core/src/physical_plan/coalesce_partitions.rs:
##########
@@ -199,6 +200,28 @@ 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 {
+ let fut = self.tasks.join_next();
Review Comment:
BTW I have been working on writing a test for this as part of
https://github.com/apache/arrow-datafusion/pull/6507
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