Github user NicoK commented on a diff in the pull request: https://github.com/apache/flink/pull/4499#discussion_r136056661 --- Diff: flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/RemoteInputChannel.java --- @@ -72,6 +79,21 @@ */ private int expectedSequenceNumber = 0; + /** The initial number of exclusive buffers assigned to this channel. */ + private int initialCredit; + + /** The current available exclusive buffers and requested floating buffers from buffer pool. */ + private final Queue<Buffer> availableBuffers = new ArrayDeque<>(); + + /** The number of available buffers that have not unannounced to producer yet. */ + private final AtomicInteger unannouncedCredit = new AtomicInteger(0); + + /** The number of unsent buffers in producer's sub partition. */ + private final AtomicInteger currentSenderBacklog = new AtomicInteger(0); + + /** The tag indicates whether this channel is waiting additional floating buffers from buffer pool. */ --- End diff -- `...waiting for additional floating buffers from the buffer pool`
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