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Posted to dev@flink.apache.org by "HunterHunter (Jira)" <ji...@apache.org> on 2021/02/04 09:03:00 UTC
[jira] [Created] (FLINK-21278) NullpointExecption error is reported
when using the evictor method to filter the data before the window
calculation
HunterHunter created FLINK-21278:
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Summary: NullpointExecption error is reported when using the evictor method to filter the data before the window calculation
Key: FLINK-21278
URL: https://issues.apache.org/jira/browse/FLINK-21278
Project: Flink
Issue Type: Bug
Components: API / DataStream
Affects Versions: 1.12.1
Reporter: HunterHunter
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
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