zhijiangW commented on a change in pull request #8654: [FLINK-12647][network] 
Add feature flag to disable release of consumed blocking partitions
URL: https://github.com/apache/flink/pull/8654#discussion_r293332653
 
 

 ##########
 File path: 
flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/ResultPartition.java
 ##########
 @@ -381,17 +383,20 @@ void onConsumedSubpartition(int subpartitionIndex) {
                        return;
                }
 
-               int refCnt = pendingReferences.decrementAndGet();
-
-               if (refCnt == 0) {
+               if (isManagedExternally) {
                        partitionManager.onConsumedPartition(this);
 
 Review comment:
   TBH I do not like the current way because it seems a bit hacky. 
   Because during `ResultPartition#onConsumedSubpartition`, the counter would 
never be 0 for external case, so the 
`ResultPartitionManager#onConsumedPartition` would never be called, then the 
internal checking logic in `ResultPartitionManager#onConsumedPartition` seems 
reductant.

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