Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/1255#discussion_r44403888
--- Diff:
flink-optimizer/src/main/java/org/apache/flink/optimizer/plantranslate/JobGraphGenerator.java
---
@@ -1141,9 +1141,6 @@ private DistributionPattern
connectJobVertices(Channel channel, int inputNumber,
final DataDistribution dataDistribution =
channel.getDataDistribution();
if (dataDistribution != null) {
sourceConfig.setOutputDataDistribution(dataDistribution, outputIndex);
- } else {
--- End diff --
Can we set a special marker data distribution that indicates a sampled
distribution?
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