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https://issues.apache.org/jira/browse/KAFKA-12170?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17262779#comment-17262779
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Sven Erik Knop commented on KAFKA-12170:
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Thanks a lot. I work for Confluent, somewhat familiar to Kafka :)
> Connect Cast cannot deal with fields of type "bytes" correctly
> --------------------------------------------------------------
>
> Key: KAFKA-12170
> URL: https://issues.apache.org/jira/browse/KAFKA-12170
> Project: Kafka
> Issue Type: Bug
> Components: KafkaConnect
> Affects Versions: 2.7.0, 2.6.1
> Reporter: Sven Erik Knop
> Assignee: Sven Erik Knop
> Priority: Major
> Fix For: 2.7.1
>
> Original Estimate: 24h
> Remaining Estimate: 24h
>
> Cast operation on a field of type bytes to a string returns the default
> ByteBuffer representation, not the content. For example, a field called
> "payload" of type bytes transformed in this way:
> payload:string
> Returns the result
> "payload":\{"string":"java.nio.HeapByteBuffer[pos=0 lim=4 cap=4]"}
> We propose instead to represent the byte array as a hex string
> "payload":\{"string":"FFEEDDAABB123F"}
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