It is an error at pipeline construction time to use CoGroupByKey with differing windowing strategies. If you want to do such joins, you may want to look into using side inputs which are more flexible.
On Wed, Jul 6, 2016 at 8:01 AM, Shen Li <[email protected]> wrote: > Hi, > > If the PCollections in a KeyedPCollectionTuple have different window > strategies (WindowFn, Trigger, etc.), how does a CoGroupByKey work? When > will it be triggered? How does it determine which kvs from each PCollection > to co-group? > > Thanks, > > Shen
