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Posted to issues@hive.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2020/02/20 17:23:00 UTC
[jira] [Work logged] (HIVE-21218) KafkaSerDe doesn't support topics
created via Confluent Avro serializer
[ https://issues.apache.org/jira/browse/HIVE-21218?focusedWorklogId=390077&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-390077 ]
ASF GitHub Bot logged work on HIVE-21218:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 20/Feb/20 17:22
Start Date: 20/Feb/20 17:22
Worklog Time Spent: 10m
Work Description: cricket007 commented on issue #526: HIVE-21218: KafkaSerDe doesn't support topics created via Confluent
URL: https://github.com/apache/hive/pull/526#issuecomment-589210115
@davidov541 Could you review this?
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Issue Time Tracking
-------------------
Worklog Id: (was: 390077)
Time Spent: 3h 50m (was: 3h 40m)
> 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: Milan Baran
> Priority: Major
> Labels: pull-request-available
> Attachments: HIVE-21218.2.patch, HIVE-21218.patch
>
> Time Spent: 3h 50m
> 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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