Github user StephanEwen commented on a diff in the pull request:
https://github.com/apache/flink/pull/1051#discussion_r37854662
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/PipelinedSubpartition.java
---
@@ -167,6 +167,13 @@ public int releaseMemory() {
}
@Override
+ public boolean isReleased() {
--- End diff --
I think it makes no difference to synchronize around variable access. A
variable read is atomic anyways, the synchronization does not add anything
there...
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