[FLINK-21278] NullpointExecption error is reported when using the evictor method to filter the data before the window calculation

• Type: Bug
• Status: Open
• Priority: Not a Priority
• Resolution: Unresolved
• Affects Version/s: 1.12.1
• Component/s: API / DataStream
• Labels: auto-deprioritized-critical auto-deprioritized-major auto-deprioritized-minor pull-request-available
• Assignee: Unassigned
• Reporter: HunterXHunter
• Created: 04/Feb/21 09:02
• Updated: 16/Aug/22 22:38

Description

When I use evictor() method to filter the data before a window is triggered, if there is no data that meets the conditions, a nullpointExecption error will be reported.

This problem occurs in the ReduceApplyWindowFunction.apply method.

So I think if there is no data to calculate whether it can not trigger the calculation, or judge whether it is null before transmitting the calculation result

Issue Links

• links to: GitHub Pull Request #15237