Backport #4129: schema_registry: Support default nil type in union for Avro #4133
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For Avro, nil type in a union is supported for backwards compatibility, if it's also the default. The default value must be of the type of the first type in the union. This change allows that. Fixes redpanda-data#4120 (cherry picked from commit 2cfa559)
BenPope
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dotnwat
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Mar 29, 2022
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Cover letter
Backport #4129
For Avro, null type in a union is supported for backwards compatibility,
if it's also the default. The default value must be of the type of the
first type in the union.
This change allows that.
Fixes #4120
Fixes #4135
Release notes
Improvements