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https://issues.apache.org/jira/browse/KAFKA-8523?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16868422#comment-16868422
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Gunnar Morling commented on KAFKA-8523:
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Good question, [~rhauch]; I didn't consider it, but I could see both approaches
making sense. Should we make this an option (insert into tombstones vs. pass
them on unmodified) for that SMT?
> InsertField transformation fails when encountering tombstone event
> ------------------------------------------------------------------
>
> Key: KAFKA-8523
> URL: https://issues.apache.org/jira/browse/KAFKA-8523
> Project: Kafka
> Issue Type: Bug
> Components: KafkaConnect
> Reporter: Gunnar Morling
> Priority: Major
>
> When applying the {{InsertField}} transformation to a tombstone event, an
> exception is raised:
> {code}
> org.apache.kafka.connect.errors.DataException: Only Map objects supported in
> absence of schema for [field insertion], found: null
> at
> org.apache.kafka.connect.transforms.util.Requirements.requireMap(Requirements.java:38)
> at
> org.apache.kafka.connect.transforms.InsertField.applySchemaless(InsertField.java:138)
> at
> org.apache.kafka.connect.transforms.InsertField.apply(InsertField.java:131)
> at
> org.apache.kafka.connect.transforms.InsertFieldTest.tombstone(InsertFieldTest.java:128)
> {code}
> AFAICS, the transform can still be made working in in this case by simply
> building up a new value map from scratch.
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