The key used in the keyBy function. HaochengWang <whc19981...@gmail.com> 于2021年6月12日周六 下午11:29写道：
> Hi, > I meet the same exception, and find your suggestion here. I'm confused > about > the word 'grouping key', is that refers to the key of the accumulating hash > map, or the key that separate the stream by some information? > > > > -- > Sent from: > http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/ > -- Best regards Sili Liu
