Github user rmetzger commented on the pull request:
https://github.com/apache/flink/commit/6731ec1e48d0a0092dd2330adda73bcf37fda8d7#commitcomment-19376002
In
flink-streaming-connectors/flink-connector-kafka-base/src/test/java/org/apache/flink/streaming/connectors/kafka/testutils/DataGenerators.java:
In
flink-streaming-connectors/flink-connector-kafka-base/src/test/java/org/apache/flink/streaming/connectors/kafka/testutils/DataGenerators.java
on line 162:
I marked the class Serializable to trick the ClosureCleaner to accept
enclosed source (which is accessing a field of the outer class).
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