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https://issues.apache.org/jira/browse/BEAM-1837?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15949820#comment-15949820
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ASF GitHub Bot commented on BEAM-1837:
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Github user asfgit closed the pull request at:
https://github.com/apache/beam/pull/2369
> NPE in KafkaIO writer
> ---------------------
>
> Key: BEAM-1837
> URL: https://issues.apache.org/jira/browse/BEAM-1837
> Project: Beam
> Issue Type: Bug
> Components: sdk-java-extensions
> Reporter: Raghu Angadi
> Assignee: Raghu Angadi
>
> {{KafkaIO.writer()...values()}} does not require user to set key coder since
> the key always null. Validation passes, but it results in an NPE at runtime
> when the writer is tries to instantiates the producer.
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