Github user fhueske commented on a diff in the pull request: https://github.com/apache/flink/pull/4625#discussion_r139385852 --- Diff: flink-libraries/flink-table/src/main/scala/org/apache/flink/table/plan/nodes/datastream/DataStreamWindowJoin.scala --- @@ -57,6 +61,8 @@ class DataStreamWindowJoin( with CommonJoin with DataStreamRel { + lazy val LOG: Logger = LoggerFactory.getLogger(getClass) --- End diff -- use `Logging` trait instead of creating logger yourself.
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