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https://issues.apache.org/jira/browse/SPARK-41344?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17641606#comment-17641606
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Kevin Cheung commented on SPARK-41344:
--------------------------------------
https://github.com/apache/spark/commit/feba05f181f594b53cf9c832cd44b00be2646938
> Reading V2 datasource masks underlying error
> --------------------------------------------
>
> Key: SPARK-41344
> URL: https://issues.apache.org/jira/browse/SPARK-41344
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.3.0, 3.3.1
> Reporter: Kevin Cheung
> Priority: Major
>
> In Spark 3.3,
> # DataSourceV2Utils, the CatalogV2Util calls {*}loadTable(x,x,x).get{*}.
> # CatalogV2Util.scala, when it tries to load a table and it fails with any
> of these exceptions NoSuchTableException, NoSuchDatabaseException,
> NoSuchNamespaceException, it would return None
> # Coming back to DataSourceV2Utils, None was previously returned and calling
> None.get results in a cryptic error technically "correct", but the *original
> exception NoSuchTableException, NoSuchDatabaseException,
> NoSuchNamespaceException are thrown away.*
>
> *Ask:*
> Retain the original error and propagate this to the user. Prior to Spark 3.3,
> the *original error* was shown and this seems like a design flaw.
>
> *Sample user facing error*
> None.get
> java.util.NoSuchElementException: None.get
> at scala.None$.get(Option.scala:529)
> at scala.None$.get(Option.scala:527)
> at
> org.apache.spark.sql.execution.datasources.v2.DataSourceV2Utils$.loadV2Source(DataSourceV2Utils.scala:129)
> at
> org.apache.spark.sql.DataFrameReader.$anonfun$load$1(DataFrameReader.scala:209)
> at scala.Option.flatMap(Option.scala:271)
> at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:207)
> at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:171)
>
> *DataSourceV2Utils.scala - CatalogV2Util.loadTable(x,x,x).get*
> [https://github.com/apache/spark/blob/7fd654c0142ab9e4002882da4e65d3b25bebd26c/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/v2/DataSourceV2Utils.scala#L137]
> *CatalogV2Util.scala - Option(catalog.asTableCatalog.loadTable(ident))*
> {*}{{*}}[https://github.com/apache/spark/blob/7fd654c0142ab9e4002882da4e65d3b25bebd26c/sql/catalyst/src/main/scala/org/apache/spark/sql/connector/catalog/CatalogV2Util.scala#L341]
> *CatalogV2Util.scala - catching the exceptions*
> [https://github.com/apache/spark/blob/7fd654c0142ab9e4002882da4e65d3b25bebd26c/sql/catalyst/src/main/scala/org/apache/spark/sql/connector/catalog/CatalogV2Util.scala#L344]
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