TumblingEventTimeWindows with negative offset / Wrong documentation

[Vladislav Pernin]

Hi,

The documentation mentions the possibility to use a negative offset with
a TumblingEventTimeWindows :

// daily tumbling event-time windows offset by -8 hours.input
    .keyBy(<key selector>)
    .window(TumblingEventTimeWindows.of(Time.days(1), Time.hours(-8)))
    .<windowed transformation>(<window function>);


But the code will throw an IllegalArgumentException :

if (offset < 0 || offset >= size) {
   throw new IllegalArgumentException("TumblingEventTimeWindows
parameters must satisfy 0 <= offset < size");
}


Regards,
Vladislav