pnowojski commented on a change in pull request #11567: [FLINK-16645] Limit the
maximum backlogs in subpartitions
URL: https://github.com/apache/flink/pull/11567#discussion_r403469452
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/ResultPartition.java
##########
@@ -375,4 +398,33 @@ void onConsumedSubpartition(int subpartitionIndex) {
private void checkInProduceState() throws IllegalStateException {
checkState(!isFinished, "Partition already finished.");
}
+
+ /**
+ * Check whether all subpartitions' backlogs are less than the
limitation of max backlogs, and make this partition
+ * available again if yes.
+ */
+ @GuardedBy("buffers")
Review comment:
I would expect the smallest atomic writes/reads would be bytes, not bits.
With longs, threads performing
```
long l = bitSet[i];
l |= 1 << n;
bitSet[i] = l;
```
would be overriding bits from other threads sharing the same long. So you
would need single byte per subpartition.
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