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https://issues.apache.org/jira/browse/SPARK-37779?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17466391#comment-17466391
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Apache Spark commented on SPARK-37779:
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User 'HyukjinKwon' has created a pull request for this issue:
https://github.com/apache/spark/pull/35058
> Make ColumnarToRowExec plan canonicalizable after (de)serialization
> -------------------------------------------------------------------
>
> Key: SPARK-37779
> URL: https://issues.apache.org/jira/browse/SPARK-37779
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.0.3, 3.1.2, 3.2.0, 3.3.0
> Reporter: Hyukjin Kwon
> Priority: Minor
>
> SPARK-23731 fixed the plans to be serializable by leveraging lazy but
> SPARK-28213 introduced new code path that calls the lazy val which triggers
> null point exception in
> https://github.com/apache/spark/blob/77b164aac9764049a4820064421ef82ec0bc14fb/sql/core/src/main/scala/org/apache/spark/sql/execution/Columnar.scala#L68
> This can fail during canonicalization during, for example, eliminating sub
> common expressions:
> {code}
> java.lang.NullPointerException
> at
> org.apache.spark.sql.execution.FileSourceScanExec.supportsColumnar$lzycompute(DataSourceScanExec.scala:280)
> at
> org.apache.spark.sql.execution.FileSourceScanExec.supportsColumnar(DataSourceScanExec.scala:279)
> at
> org.apache.spark.sql.execution.InputAdapter.supportsColumnar(WholeStageCodegenExec.scala:509)
> at
> org.apache.spark.sql.execution.ColumnarToRowExec.<init>(Columnar.scala:67)
> ...
> at
> org.apache.spark.sql.catalyst.plans.QueryPlan.canonicalized$lzycompute(QueryPlan.scala:581)
> at
> org.apache.spark.sql.catalyst.plans.QueryPlan.canonicalized(QueryPlan.scala:580)
> at
> org.apache.spark.sql.execution.ScalarSubquery.canonicalized$lzycompute(subquery.scala:110)
> ...
> at
> org.apache.spark.sql.catalyst.expressions.ExpressionEquals.hashCode(EquivalentExpressions.scala:275)
> ...
> at scala.collection.mutable.HashTable.findEntry$(HashTable.scala:135)
> at scala.collection.mutable.HashMap.findEntry(HashMap.scala:44)
> at scala.collection.mutable.HashMap.get(HashMap.scala:74)
> at
> org.apache.spark.sql.catalyst.expressions.EquivalentExpressions.addExpr(EquivalentExpressions.scala:46)
> at
> org.apache.spark.sql.catalyst.expressions.EquivalentExpressions.addExprTreeHelper$1(EquivalentExpressions.scala:147)
> at
> org.apache.spark.sql.catalyst.expressions.EquivalentExpressions.addExprTree(EquivalentExpressions.scala:170)
> at
> org.apache.spark.sql.catalyst.expressions.SubExprEvaluationRuntime.$anonfun$proxyExpressions$1(SubExprEvaluationRuntime.scala:89)
> at
> org.apache.spark.sql.catalyst.expressions.SubExprEvaluationRuntime.$anonfun$proxyExpressions$1$adapted(SubExprEvaluationRuntime.scala:89)
> at scala.collection.immutable.List.foreach(List.scala:392)
> {code}
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