It's a bug. It also occurs in the Java API. Perhaps we can find a fix for the release..
On Wed, Nov 4, 2015 at 2:40 PM, Maximilian Michels <m...@apache.org> wrote: > Hi Gyula, > > Trying to reproduce this error now. I'm assuming this is 0.10-SNAPSHOT? > > Cheers, > Max > > On Wed, Nov 4, 2015 at 1:49 PM, Gyula Fóra <gyf...@apache.org> wrote: >> Hey, >> >> Running the following simple application gives me an error: >> >> //just counting by key, the >> streamOfIntegers.keyBy(x -> x).timeWindow(Time.milliseconds(3000)).fold(0, ( >> c, next) -> c + 1).print(); >> >> Executing this gives the following error: >> >> "No initial value was serialized for the fold window function. Probably the >> setOutputType method was not called." >> >> Any idea? >> >> Cheers, >> >> Gyula
