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https://issues.apache.org/jira/browse/HIVE-21218?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17058218#comment-17058218
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David McGinnis commented on HIVE-21218:
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Thanks, [~bslim]!
I'm not seeing any documentation on the Hive wiki for Kafka support. It looks
like based on HIVE-20377 that it won't be officially released until Hive 4, but
I assumed there would be some documentation written at this point. Is there any
existing documentation I should add this information to? If not, are there any
JIRAs to write such documentation around for Hive 4? Or should we have a task
to take care of that? Being the creator of the feature, you'd obviously be the
best person to do that work if not, but I'm happy to help if necessary.
> KafkaSerDe doesn't support topics created via Confluent Avro serializer
> -----------------------------------------------------------------------
>
> Key: HIVE-21218
> URL: https://issues.apache.org/jira/browse/HIVE-21218
> Project: Hive
> Issue Type: Bug
> Components: kafka integration, Serializers/Deserializers
> Affects Versions: 3.1.1
> Reporter: Milan Baran
> Assignee: David McGinnis
> Priority: Major
> Labels: pull-request-available
> Attachments:
> 0001-HIVE-21818-Adding-ability-for-Kafka-Handler-to-proce.patch,
> HIVE-21218.10.patch, HIVE-21218.11.patch, HIVE-21218.12.patch,
> HIVE-21218.13.patch, HIVE-21218.2.patch, HIVE-21218.3.patch,
> HIVE-21218.4.patch, HIVE-21218.5.patch, HIVE-21218.6.patch,
> HIVE-21218.7.patch, HIVE-21218.8.patch, HIVE-21218.9.patch, HIVE-21218.patch
>
> Time Spent: 15h
> Remaining Estimate: 0h
>
> According to [Google
> groups|https://groups.google.com/forum/#!topic/confluent-platform/JYhlXN0u9_A]
> the Confluent avro serialzier uses propertiary format for kafka value -
> <magic_byte 0x00><4 bytes of schema ID><regular avro bytes for object that
> conforms to schema>.
> This format does not cause any problem for Confluent kafka deserializer which
> respect the format however for hive kafka handler its bit a problem to
> correctly deserialize kafka value, because Hive uses custom deserializer from
> bytes to objects and ignores kafka consumer ser/deser classes provided via
> table property.
> It would be nice to support Confluent format with magic byte.
> Also it would be great to support Schema registry as well.
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