pnowojski commented on a change in pull request #6692: [FLINK-10331][network]
reduce unnecesary flushing
URL: https://github.com/apache/flink/pull/6692#discussion_r218323627
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/PipelinedSubpartition.java
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@@ -279,6 +281,21 @@ public int unsynchronizedGetNumberOfQueuedBuffers() {
return Math.max(buffers.size(), 0);
}
+ @Override
+ public void flush() {
+ synchronized (buffers) {
+ if (buffers.isEmpty()) {
+ return;
+ }
+ if (!flushRequested) {
+ flushRequested = true; // set this before the
notification!
+ if (buffers.size() == 1) {
Review comment:
this if check deserves an explanation, either here or in the java doc above.
> If there is more then 1 buffer, when we were adding second one we have
already notified the reader
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