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https://issues.apache.org/jira/browse/SPARK-43099?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan reassigned SPARK-43099:
-----------------------------------
Assignee: Alex Jing
> `Class.getCanonicalName` return null for anonymous class on JDK15+, impacting
> function registry
> -----------------------------------------------------------------------------------------------
>
> Key: SPARK-43099
> URL: https://issues.apache.org/jira/browse/SPARK-43099
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 3.4.0
> Reporter: Alex Jing
> Assignee: Alex Jing
> Priority: Major
> Fix For: 3.5.0
>
>
> On JDK15+, lambda and method references are implemented using hidden classes
> ([https://openjdk.org/jeps/371)] According to the JEP,
> {quote}{{Class::getCanonicalName}} returns {{{}null{}}}, indicating the
> hidden class has no canonical name. (Note that the {{Class}} object for an
> anonymous class in the Java language has the same behavior.)
> {quote}
> This means
> [https://github.com/apache/spark/blob/master/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala#L53]
> will always be null.
>
> This can be fixed by replacing `getCanonicalName` with `getName`
>
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