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https://issues.apache.org/jira/browse/BEAM-10529?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17211204#comment-17211204
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Beam JIRA Bot commented on BEAM-10529:
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This issue is P2 but has been unassigned without any comment for 60 days so it
has been labeled "stale-P2". If this issue is still affecting you, we care!
Please comment and remove the label. Otherwise, in 14 days the issue will be
moved to P3.
Please see https://beam.apache.org/contribute/jira-priorities/ for a detailed
explanation of what these priorities mean.
> Kafka XLang fails for ?empty? key/values
> ----------------------------------------
>
> Key: BEAM-10529
> URL: https://issues.apache.org/jira/browse/BEAM-10529
> Project: Beam
> Issue Type: Bug
> Components: io-java-kafka, sdk-py-core
> Reporter: Luke Cwik
> Priority: P2
> Labels: stale-P2
>
> It looks like the Javadoc for ByteArrayDeserializer and StringDeserializer
> can return null[1, 2] and we aren't using
> NullableCoder.of(ByteArrayCoder.of()) in the expansion[3]. Note that KafkaIO
> does this correctly in its regular coder inference logic[4].
> 1:
> https://kafka.apache.org/21/javadoc/org/apache/kafka/common/serialization/ByteArrayDeserializer.html#deserialize-java.lang.String-byte:A-2:
>
> https://kafka.apache.org/21/javadoc/org/apache/kafka/common/serialization/StringDeserializer.html#deserialize-java.lang.String-byte:A-
> 3:
> https://github.com/apache/beam/blob/af2d6b0379d64b522ecb769d88e9e7e7b8900208/sdks/java/io/kafka/src/main/java/org/apache/beam/sdk/io/kafka/KafkaIO.java#L478
> 4:
> https://github.com/apache/beam/blob/af2d6b0379d64b522ecb769d88e9e7e7b8900208/sdks/java/io/kafka/src/main/java/org/apache/beam/sdk/io/kafka/LocalDeserializerProvider.java#L85
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