Github user tillrohrmann commented on a diff in the pull request:
https://github.com/apache/flink/pull/2110#discussion_r68240257
--- Diff:
flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/tasks/OperatorChain.java
---
@@ -386,4 +402,23 @@ public void close() {
}
}
}
+
+ /**
+ * Special version of {@link BroadcastingOutputCollector} that performs
a shallow copy of the
+ * {@link StreamRecord} to ensure that multi-chaining works correctly.
+ */
+ private static final class CopyingBroadcastingOutputCollector<T>
extends BroadcastingOutputCollector<T> {
+
+ public
CopyingBroadcastingOutputCollector(Output<StreamRecord<T>>[] outputs) {
+ super(outputs);
+ }
+
+ @Override
+ public void collect(StreamRecord<T> record) {
+ for (Output<StreamRecord<T>> output : outputs) {
+ StreamRecord<T> shallowCopy =
record.copy(record.getValue());
+ output.collect(shallowCopy);
+ }
--- End diff --
Here, the same. I think we could save one copying operation by giving the
original `record` to the last output.
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