Joe McDonnell created IMPALA-6854:

             Summary: TestExchangeDelays::test_exchange_small_delay()'s 
implementation doesn't match description
                 Key: IMPALA-6854
             Project: IMPALA
          Issue Type: Bug
          Components: Backend
    Affects Versions: Impala 3.1.0
            Reporter: Joe McDonnell

test_exchange_small_delay() has this description:
def test_exchange_small_delay(self, vector):
  """Test delays in registering data stream receivers where the first one or two
  batches will time out before the receiver registers, but subsequent batches 
  arrive after the receiver registers. Before IMPALA-2987, this scenario 
resulted in
  incorrect results.
However, looking at the logs when the first sender times out, the query is 
cancelled. In my manual tests, the query does not return a result. This test 
case may be out of date. As it is, this overlaps with what 
test_exchange_large_delay() is doing.

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