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Posted to issues@beam.apache.org by "Alexis De Man (Jira)" <ji...@apache.org> on 2022/02/03 02:16:00 UTC

[jira] [Commented] (BEAM-10529) Kafka XLang fails for ?empty? key/values

    [ https://issues.apache.org/jira/browse/BEAM-10529?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17486186#comment-17486186 ] 

Alexis De Man commented on BEAM-10529:
--------------------------------------

We're facing the same issue.

We have no control on how the data is produced and must be able to read messages without a key.

This is preventing us from using Beam.

 

> 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: cross-language, io-java-kafka
>            Reporter: Luke Cwik
>            Priority: P1
>
> 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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