zhijiangW commented on a change in pull request #11786: [FLINK-17208][network]
Reduce redundant data available notifications of PipelinedSubpartition
URL: https://github.com/apache/flink/pull/11786#discussion_r410367850
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/PipelinedSubpartition.java
##########
@@ -367,8 +377,9 @@ public void flush() {
}
// if there is more then 1 buffer, we already notified
the reader
// (at the latest when adding the second buffer)
- notifyDataAvailable = !flushRequested && buffers.size()
== 1 && buffers.peek().isDataAvailable();
+ notifyDataAvailable = mayNotifyDataAvailable() &&
buffers.peekFirst().isDataAvailable();
flushRequested = flushRequested || buffers.size() > 1
|| notifyDataAvailable;
+ dataAvailableNotified = dataAvailableNotified ||
notifyDataAvailable;
Review comment:
Refer to https://github.com/apache/flink/pull/11786/files#r410367542, we can
remove `dataAvailableNotified = dataAvailableNotified || notifyDataAvailable;`
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