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https://issues.apache.org/jira/browse/SPARK-37061?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-37061:
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Assignee: (was: Apache Spark)
> Custom V2 Metrics uses wrong classname for lookup
> -------------------------------------------------
>
> Key: SPARK-37061
> URL: https://issues.apache.org/jira/browse/SPARK-37061
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.2.0
> Reporter: Russell Spitzer
> Priority: Minor
>
> Currently CustomMetrics uses `getCanonicalName` to get the metric type name
> https://github.com/apache/spark/blob/38493401d18d42a6cb176bf515536af97ba1338b/sql/core/src/main/scala/org/apache/spark/sql/execution/metric/CustomMetrics.scala#L31-L33
> But when using reflection we need to use the original type name.
> Here is an example when working with an inner class
> {code:java title="CanonicalName vs Name"}
> Class.getName =
> org.apache.iceberg.spark.source.SparkBatchScan$FilesScannedMetric
> Class.getCanonicalName =
> org.apache.iceberg.spark.source.SparkBatchScan.FilesScannedMetric
> {code}
> The "$" name is required to look up this class while the "." version will
> fail with CNF.
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