[GitHub] [flink] StefanRRichter commented on a change in pull request #8361: [FLINK-12434][network] Replace listeners with CompletableFuture in InputGates

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StefanRRichter commented on a change in pull request #8361: [FLINK-12434][network] Replace listeners with CompletableFuture in InputGates
URL: https://github.com/apache/flink/pull/8361#discussion_r282023881
 
 

 ##########
 File path: flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/SingleInputGate.java
 ##########
 @@ -551,21 +551,20 @@ public void requestPartitions() throws IOException, InterruptedException {
 				}
 
 				currentChannel = inputChannelsWithData.remove();
-				enqueuedInputChannelsWithData.clear(currentChannel.getChannelIndex());
+
+				result = currentChannel.getNextBuffer();
+
+				if (result.isPresent() && result.get().moreAvailable()) {
+					// enqueue the currentChannel at the end to avoid starvation
 
 Review comment:
   Nit: if we split the if, we can already add a `break` here and avoid checking  `!result.isPresent()` again in the loop.

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