Github user zhijiangW commented on the issue:
https://github.com/apache/flink/pull/5558
@NicoK , as I described in the purpose of the change, there are two
scenarios for this issue. And I only modified the previous
`RemoteInputChannelTest#testAvailableBuffersLessThanRequiredBuffers` to cover
one scenario. Do you think it is necessary to cover another scenario by
recycling exclusive buffers to make available buffers not less than required
buffers in a new unit test?---
