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https://issues.apache.org/jira/browse/FLINK-23727?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17400771#comment-17400771
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Yao Zhang commented on FLINK-23727:
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Hi [~Paul Lin],
I encountered the same issue with very early Flink version. Personally I
suggest we should rework SimpleStringSchema for better usability.
We could add a parameter indicating that whether null value should be tolerated
or not.
> Skip null values in SimpleStringSchema#deserialize
> --------------------------------------------------
>
> Key: FLINK-23727
> URL: https://issues.apache.org/jira/browse/FLINK-23727
> Project: Flink
> Issue Type: Bug
> Components: Connectors / Common
> Affects Versions: 1.13.2
> Reporter: Paul Lin
> Priority: Major
>
> In Kafka use cases, it's valid to send a message with a key and a null
> payload as a tombstone. But SimpleStringSchema, which is frequently used as a
> message value deserializer, throws NPE when the input value is null. We
> should tolerate null values in SimpleStringSchema (simply return null to skip
> the records), otherwise users need to implement a custom one.
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