zhuzhurk commented on code in PR #26127:
URL: https://github.com/apache/flink/pull/26127#discussion_r1948529561
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flink-runtime/src/main/java/org/apache/flink/streaming/api/graph/AdaptiveGraphManager.java:
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@@ -618,6 +619,15 @@ && isChainableSource(
streamGraph.getStreamNode(edge.getSourceId()), streamGraph))
|| isChainable(edge, streamGraph)) {
edge.setPartitioner(new ForwardPartitioner<>());
+
+ // Because the exchange mode of
ForwardForConsecutiveHashPartitioner might be Batch.
+ // So here we need to modify the exchange mode to UNDEFINED
for edge with
+ // ForwardForConsecutiveHashPartitioner to make this edge
chainable.
Review Comment:
// ForwardForConsecutiveHashPartitioner may use BATCH exchange mode, which
prevents operator chaining.
// To enable chaining for edges using this partitioner, we need to set their
exchange mode to UNDEFINED.
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