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Paul Lin commented on FLINK-10680: ---------------------------------- [~hequn8128] Thanks for the pointer. I looked into the commit logs and found this parameter check is added in a refactoring of tests [FLINK-4994|https://issues.apache.org/jira/browse/FLINK-4994] which has no description of the offset API changes, so I think it is more likely to be a bug rather than an expected change. > Unable to set negative offsets for TumblingEventTimeWindow > ---------------------------------------------------------- > > Key: FLINK-10680 > URL: https://issues.apache.org/jira/browse/FLINK-10680 > Project: Flink > Issue Type: Bug > Components: DataStream API > Affects Versions: 1.6.1 > Reporter: Paul Lin > Priority: Major > > The following code given in documentation throws an IllegalArgumentException: > TumblingEventTimeWindows parameters must satisfy 0 <= offset < size. > > TumblingEventTimeWindows.of(Time.days(1), Time.hours(-8)); > By design, the offset could be negative to fit in different time zones. -- This message was sent by Atlassian JIRA (v7.6.3#76005)