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https://issues.apache.org/jira/browse/KAFKA-8523?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16931761#comment-16931761
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Randall Hauch edited comment on KAFKA-8523 at 9/17/19 7:32 PM:
---------------------------------------------------------------

[~gunnar.morling], good point. I think a tombstone should be left unmodified by 
this SMT, which means no need for a KIP or a config change.

I think dropping a tombstone or replacing a tombstone with a non-null value are 
separate SMTs.


was (Author: rhauch):
[~gunnar.morling], good point. I think a tombstone should be left unmodified by 
this SMT, which means no need for a KIP or a config change.

I think converting or dropping a tombstone are separate SMTs.

> 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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