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https://issues.apache.org/jira/browse/KAFKA-14162?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yash Mayya reassigned KAFKA-14162:
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Assignee: Yash Mayya
> HoistField SMT should not return an immutable map for schemaless key/value
> --------------------------------------------------------------------------
>
> Key: KAFKA-14162
> URL: https://issues.apache.org/jira/browse/KAFKA-14162
> Project: Kafka
> Issue Type: Improvement
> Components: KafkaConnect
> Reporter: Yash Mayya
> Assignee: Yash Mayya
> Priority: Minor
>
> The HoistField SMT currently returns an immutable map for schemaless keys and
> values -
> https://github.com/apache/kafka/blob/22007fba7c7346c5416f4db4e104434fdab265ee/connect/transforms/src/main/java/org/apache/kafka/connect/transforms/HoistField.java#L62.
>
> This can cause issues in connectors if they attempt to modify the
> SourceRecord's key or value since Kafka Connect doesn't document that these
> keys/values are immutable. Furthermore, no other SMT does this.
>
> An example of a connector that would fail when schemaless values are used
> with this SMT is Microsoft's Cosmos DB Sink Connector -
> https://github.com/microsoft/kafka-connect-cosmosdb/blob/368566367a1dcbf9a91213067f1b9219a530bb16/src/main/java/com/azure/cosmos/kafka/connect/sink/CosmosDBSinkTask.java#L123-L130
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