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https://issues.apache.org/jira/browse/FLINK-23982?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17407987#comment-17407987
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Till Rohrmann commented on FLINK-23982:
---------------------------------------
This problem does appear to occur too often. Shall we close this ticket as
cannot reproduce soonish?
> Compiling error in WindowOperatorTest with JDK11
> ------------------------------------------------
>
> Key: FLINK-23982
> URL: https://issues.apache.org/jira/browse/FLINK-23982
> Project: Flink
> Issue Type: Bug
> Components: Build System
> Affects Versions: 1.14.0
> Reporter: Xintong Song
> Priority: Major
> Labels: test-stability
> Fix For: 1.14.0
>
>
> What I don't understand is, while the error does not seem to be environment
> related, the other JDK11 compiling stages in the same build did not fail.
> https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=22855&view=logs&j=6caf31d6-847a-526e-9624-468e053467d6&t=0b23652f-b18b-5b6e-6eb6-a11070364610&l=3650
> {code}
> [INFO] -------------------------------------------------------------
> [ERROR] COMPILATION ERROR :
> [INFO] -------------------------------------------------------------
> [ERROR]
> /home/vsts/work/1/s/flink-streaming-java/src/test/java/org/apache/flink/streaming/runtime/operators/windowing/WindowOperatorTest.java:[678,43]
> incompatible types: cannot infer type arguments for
> org.apache.flink.streaming.runtime.operators.windowing.WindowOperator<>
> reason: inference variable KEY has incompatible equality constraints
> ACC,org.apache.flink.api.java.tuple.Tuple2<java.lang.String,java.lang.Integer>,IN,K,java.lang.String
> {code}
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