zhuzhurk commented on a change in pull request #13657:
URL: https://github.com/apache/flink/pull/13657#discussion_r506045078



##########
File path: 
flink-runtime/src/test/java/org/apache/flink/runtime/scheduler/strategy/PipelinedRegionSchedulingStrategyTest.java
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@@ -67,13 +69,18 @@ private void buildTopology() {
 
                source = 
testingSchedulingTopology.addExecutionVertices().withParallelism(PARALLELISM).finish();
                map = 
testingSchedulingTopology.addExecutionVertices().withParallelism(PARALLELISM).finish();
+               map2 = 
testingSchedulingTopology.addExecutionVertices().withParallelism(PARALLELISM).finish();

Review comment:
       I prefer to not change the topology for existing tests and not change 
unrelated tests.
   I think it's better to add a new case 
`testSchedulingTopologyWithPersistentBlockingEdges()` which initializes a 
`PipelinedRegionSchedulingStrategy` from a topology which contains 
`BLOCKING_PERSISTENT` results.




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