I changed it to Tuple2 and that problem is solved.
Any thoughts on this message
*Unapplied methods are only converted to functions when a function type is
expected.*
*You can make this conversion explicit by writing `updateAcrossEvents _` or
`updateAcrossEvents(_,_,_,_,_)` instead of `update
maybe you can combine the fields you want to use into one field
Something Something 于2020年3月3日周二 上午6:37写道：
> I am writing a Stateful Streaming application in which I am using
> mapGroupsWithState to create aggregates for Groups but I need to create
> *Groups
> based on more than one column in t
