liming30 commented on a change in pull request #13109:
URL: https://github.com/apache/flink/pull/13109#discussion_r477237731
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File path:
flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/tasks/OperatorChain.java
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@@ -409,7 +410,7 @@ public OP getHeadOperator() {
if (selectors == null || selectors.isEmpty()) {
// simple path, no selector necessary
- if (allOutputs.size() == 1) {
+ if (allOutputs.size() == 1 && !(allOutputs.get(0).f0
instanceof RecordWriterOutput)) {
Review comment:
If we use `CountingOutput` directly, we can’t distinguish whether the
record is actually sent (just like it was filtered by `OutputTag` in
`sideOutput`)
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