Github user aljoscha commented on a diff in the pull request:
https://github.com/apache/flink/pull/3587#discussion_r107446308
--- Diff:
flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/operators/windowing/WindowOperator.java
---
@@ -138,7 +138,7 @@
* {@code window.maxTimestamp + allowedLateness} is smaller than the
current watermark will
* be emitted to this.
*/
- private final OutputTag<IN> lateDataOutputTag;
+ protected final OutputTag<IN> lateDataOutputTag;
--- End diff --
It is protected so that `EvictingWindowOperator` can access it. I could
make it package private, though.
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