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https://issues.apache.org/jira/browse/KAFKA-8446?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16853862#comment-16853862
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ASF GitHub Bot commented on KAFKA-8446:
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guozhangwang commented on pull request #6842: KAFKA-8446: Kafka Streams
restoration crashes with NPE when the record value is null
URL: https://github.com/apache/kafka/pull/6842
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> Kafka Streams restoration crashes with NPE when the record value is null
> ------------------------------------------------------------------------
>
> Key: KAFKA-8446
> URL: https://issues.apache.org/jira/browse/KAFKA-8446
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Affects Versions: 2.3.0
> Reporter: Boyang Chen
> Assignee: Boyang Chen
> Priority: Blocker
>
> To add more context here:
> a NPE will be triggered in *RecordConverters#ByteBuffer.allocate(8 +
> rawValue.length)* if the raw value with record is null. A scenario you could
> reproduce is like:
> # Having a source KTable (timestampedKeyValueStore) reads in tombstone
> records where the value field is null. Note that you need to turn off stream
> level cache, otherwise the null value will not be forwarded.
> # Shutdown the application, and clear local state stores.
> # Restart the application before changelog topic starts compaction. If we
> are "lucky", the tombstone record will trigger null pointer exception during
> restoration when we try to extract raw value length.
>
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