You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@flink.apache.org by "Aljoscha Krettek (Jira)" <ji...@apache.org> on 2020/07/15 14:55:00 UTC
[jira] [Closed] (FLINK-18599) Compile error when use windowAll and
TumblingProcessingTimeWindows
[ https://issues.apache.org/jira/browse/FLINK-18599?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Aljoscha Krettek closed FLINK-18599.
------------------------------------
Resolution: Not A Bug
> Compile error when use windowAll and TumblingProcessingTimeWindows
> ------------------------------------------------------------------
>
> Key: FLINK-18599
> URL: https://issues.apache.org/jira/browse/FLINK-18599
> Project: Flink
> Issue Type: Bug
> Components: API / Scala
> Affects Versions: 1.11.0
> Reporter: henvealf
> Priority: Major
>
> Code:
> {code:java}
> import org.apache.commons.lang3.StringUtils
> import org.apache.flink.streaming.api.scala.StreamExecutionEnvironment
> import org.apache.flink.streaming.api.windowing.assigners.{TumblingProcessingTimeWindows}
> import org.apache.flink.streaming.api.windowing.time.Time
> import org.apache.flink.streaming.api.scala._
>
> val env = StreamExecutionEnvironment.getExecutionEnvironment
> val stream = env.fromElements("a", "b", "c")
> stream
> .filter((str: String) => StringUtils.isNotEmpty(str))
> .map( _ => 1)
> .windowAll(TumblingProcessingTimeWindows.of(Time.seconds(5)))
> .reduce((a1, a2) => a1 + a2)
> .print()
> {code}
> Compile failed:
> {code:java}
> error: type mismatch;
> found : org.apache.flink.streaming.api.windowing.assigners.TumblingProcessingTimeWindows
> required: org.apache.flink.streaming.api.windowing.assigners.WindowAssigner[_ >: Int, ?]
> Note: Object <: Any (and org.apache.flink.streaming.api.windowing.assigners.TumblingProcessingTimeWindows <: org.apache.flink.streaming.api.windowing.assigners.WindowAssigner[Object,org.apache.flink.streaming.api.windowing.windows.TimeWindow]), but Java-defined class WindowAssigner is invariant in type T.
> You may wish to investigate a wildcard type such as `_ <: Any`. (SLS 3.2.10)
> .windowAll(TumblingProcessingTimeWindows.of(Time.seconds(5)))
> ^
> one error found
> {code}
> What went wrong?
> Scala version: 2.11
> Flink version: 1.11
> Thanks.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)