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https://issues.apache.org/jira/browse/SPARK-27858?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-27858:
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Assignee: (was: Apache Spark)
> Fix for avro deserialization on union types with multiple non-null types
> ------------------------------------------------------------------------
>
> Key: SPARK-27858
> URL: https://issues.apache.org/jira/browse/SPARK-27858
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.0.0, 2.4.3
> Reporter: Dongjoon Hyun
> Priority: Major
>
> This issue aims to fix a union avro type with more than one non-null value
> (for instance `["string", "null", "int"]`) the deserialization to a DataFrame
> would throw a `java.lang.ArrayIndexOutOfBoundsException`. The issue was that
> the `fieldWriter` relied on the index from the avro schema before null were
> filtered out.
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