gitmodimo commented on PR #47386:
URL: https://github.com/apache/arrow/pull/47386#issuecomment-3273957516
> Would it be possible to write a case about it?
I added as UT. It would be difficult to orchestrate using ExecNodes.
This test fails against current main.
```
TEST(BackpressureConcurrentQueue, BackpressureTestStayUnpaused) {
BackpressureTestExecNode dummy_node;
auto ctrl = std::make_unique<TestBackpressureControl>(&dummy_node);
ASSERT_OK_AND_ASSIGN(auto handler,
BackpressureHandler::Make(&dummy_node, 2, 4,
std::move(ctrl)));
BackpressureConcurrentQueue<int> queue(std::move(handler));
queue.Push(6);
queue.Push(7);
queue.Push(8);
ASSERT_FALSE(dummy_node.paused);
ASSERT_FALSE(dummy_node.stopped);
ASSERT_OK(queue.ForceShutdown());
for(int i=0;i<10;++i){
queue.Push(i);
}
ASSERT_FALSE(dummy_node.paused); // fails
ASSERT_TRUE(dummy_node.stopped);
}
```
Anyways I hope ForceShutdown will become obsolete after acero refactor
succeeds .
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