Github user kl0u commented on a diff in the pull request: https://github.com/apache/flink/pull/3484#discussion_r105401503 --- Diff: flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/tasks/OperatorChain.java --- @@ -387,14 +403,25 @@ public int getChainLength() { protected final StreamStatusProvider streamStatusProvider; - public ChainingOutput(OneInputStreamOperator<T, ?> operator, StreamStatusProvider streamStatusProvider) { + protected final OutputTag<T> outputTag; + + public ChainingOutput( + OneInputStreamOperator<T, ?> operator, + StreamStatusProvider streamStatusProvider, + OutputTag<T> outputTag) { this.operator = operator; this.numRecordsIn = ((OperatorMetricGroup) operator.getMetricGroup()).getIOMetricGroup().getNumRecordsInCounter(); this.streamStatusProvider = streamStatusProvider; + this.outputTag = outputTag; } @Override --- End diff -- Again the two `collect()` methods have much identical code. We can put that common code in a separate private method and calls this instead of repeating the code.
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