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请教个问题：FlinkKakfaConsumer 多次消费

首先感谢大佬的博客，帮了我的大忙。。
最近刚开始接触flink，应用在公司风控场景中。今天突然遇到个问题，请教下，就是我在一个job中启动了四个DataStream中，都使用了kafka 组件，消费同一个 topic，当然四个 kafkaconsomer的GroupId都设置成了唯一值。并且在FlatMap 函数中打印出消费的内容，刚刚在看日志发现，同样的一条消息每个DataStream都打印了两条。。。也就是出现了重复消费的情况。。而且我定制的SInk中也发现调用了两次invoke的现象。。请问大佬有遇到过这个问题吗？是设么原因呢？

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