sunhaibotb commented on issue #10151: [FLINK-14231] Handle the pending processing-time timers to make endInput semantics on the operator chain strict URL: https://github.com/apache/flink/pull/10151#issuecomment-572393756 > Can we avoid adding null or null wrapper into the chain? > If not, can we use null object pattern? > Most of them were added previously, so probably it can be done in a separate PR. +1
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