Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/4509#discussion_r143424259
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/RemoteInputChannel.java
---
@@ -306,10 +311,27 @@ public void recycle(MemorySegment segment) {
ExceptionUtils.rethrow(t);
}
}
+
+ // Recycle the extra floating buffers in order not to
stack up 2*initialCredit
+ // buffers once current backlog is 0
+ if (senderBacklog.get() == 0 && availableBuffers.size()
>= initialCredit) {
--- End diff --
This behaviour, i.e. sticking to `senderBacklog.get() + initialCredit`
buffers in any case, should then also receive verification via a unit test :)
---
