wsry commented on a change in pull request #11351: [FLINK-16404][runtime] Avoid
caching buffers for blocked input channels before barrier alignment
URL: https://github.com/apache/flink/pull/11351#discussion_r407166977
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/PipelinedSubpartition.java
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@@ -179,6 +182,10 @@ public void release() {
@Nullable
BufferAndBacklog pollBuffer() {
synchronized (buffers) {
+ if (isBlockedByCheckpoint) {
Review comment:
Because there are redundant notifications for local channel which means we
may notify data available even when the downstream task in the poll loop. Maybe
we fix it in another ticket if we think it's a problem.
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