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.---
