lamber-ken commented on issue #8583: [FLINK-11820][serialization] SimpleStringSchema handle message record which value is null URL: https://github.com/apache/flink/pull/8583#issuecomment-505381752 > Yes, the Kafka consumer swallows them silently, but if you change `SimpleStringSchema`, it will create the nulls in the first place. The problem is in the interaction of the different parts, so we cannot change `SimpleStringSchema` in isolation because it would lead to silent data dropping. Thanks for your comment. But, I have a slightly different view from yours. Users may not care about the null values in many scenarios, and if mq queue contains a null value, the consumer will can not comsumer any records because of the NPE and the kafka offset can't commit anymore. Users can use `TypeInformationKeyValueSerializationSchema` to handle null valuses for now.
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