[Flink] Flink single task multiple streams consume the same topic when one stream is stuck and does not consume

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1 Overview

The main reference for this article: scene reproduction 5

This time the scene is even stranger. Because a rule does not trigger data, we will build a set of local environment with data and rules on site. Testing is possible, but on site it is not.

After investigating for a long time, I couldn't find the reason, and I don't know where to start.

Later, I ruled out other factors, let this task consume a temporary topic, write a triggerable data into it, and then it didn't trigger.

Flink has multiple streams for one task, as follows

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Origin blog.csdn.net/qq_21383435/article/details/114601590