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Posted to issues@spark.apache.org by "Takeshi Yamamuro (Jira)" <ji...@apache.org> on 2020/12/17 08:02:00 UTC
[jira] [Updated] (SPARK-33823) Use the `CastSupport.cast` method in
HashJoin
[ https://issues.apache.org/jira/browse/SPARK-33823?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Takeshi Yamamuro updated SPARK-33823:
-------------------------------------
Issue Type: Bug (was: Improvement)
> Use the `CastSupport.cast` method in HashJoin
> ---------------------------------------------
>
> Key: SPARK-33823
> URL: https://issues.apache.org/jira/browse/SPARK-33823
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.0.1, 3.1.0, 3.2.0
> Reporter: Takeshi Yamamuro
> Priority: Major
>
> This ticket aims at fixing the bug that throws a unsupported exception when running the TPCDS q5 with AQE enabled (this option is enabled by default now):
> {code}
> java.lang.UnsupportedOperationException: BroadcastExchange does not support the execute() code path.
> at org.apache.spark.sql.execution.exchange.BroadcastExchangeExec.doExecute(BroadcastExchangeExec.scala:189)
> at org.apache.spark.sql.execution.SparkPlan.$anonfun$execute$1(SparkPlan.scala:180)
> at org.apache.spark.sql.execution.SparkPlan.$anonfun$executeQuery$1(SparkPlan.scala:218)
> at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:151)
> at org.apache.spark.sql.execution.SparkPlan.executeQuery(SparkPlan.scala:215)
> at org.apache.spark.sql.execution.SparkPlan.execute(SparkPlan.scala:176)
> at org.apache.spark.sql.execution.exchange.ReusedExchangeExec.doExecute(Exchange.scala:60)
> at org.apache.spark.sql.execution.SparkPlan.$anonfun$execute$1(SparkPlan.scala:180)
> at org.apache.spark.sql.execution.SparkPlan.$anonfun$executeQuery$1(SparkPlan.scala:218)
> at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:151)
> at org.apache.spark.sql.execution.SparkPlan.executeQuery(SparkPlan.scala:215)
> at org.apache.spark.sql.execution.SparkPlan.execute(SparkPlan.scala:176)
> at org.apache.spark.sql.execution.adaptive.QueryStageExec.doExecute(QueryStageExec.scala:115)
> at org.apache.spark.sql.execution.SparkPlan.$anonfun$execute$1(SparkPlan.scala:180)
> at org.apache.spark.sql.execution.SparkPlan.$anonfun$executeQuery$1(SparkPlan.scala:218)
> at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:151)
> at org.apache.spark.sql.execution.SparkPlan.executeQuery(SparkPlan.scala:215)
> at org.apache.spark.sql.execution.SparkPlan.execute(SparkPlan.scala:176)
> at org.apache.spark.sql.execution.SparkPlan.getByteArrayRdd(SparkPlan.scala:321)
> at org.apache.spark.sql.execution.SparkPlan.executeCollectIterator(SparkPlan.scala:397)
> at org.apache.spark.sql.execution.exchange.BroadcastExchangeExec.$anonfun$relationFuture$1(BroadcastExchangeExec.scala:118)
> at org.apache.spark.sql.execution.SQLExecution$.$anonfun$withThreadLocalCaptured$1(SQLExecution.scala:185)
> at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
> ...
> {code}
> I've checked the AQE code and I found `EnsureRequirements` wrongly puts `BroadcastExchange` on a top of `BroadcastQueryStage` in the `reOptimize` phase as follows:
> {code}
> +- BroadcastExchange HashedRelationBroadcastMode(List(cast(input[0, int, true] as bigint)),false), [id=#2183]
> +- BroadcastQueryStage 2
> +- ReusedExchange [d_date_sk#1086], BroadcastExchange HashedRelationBroadcastMode(List(cast(input[0, int, true] as bigint)),false), [id=#1963]
> {code}
> A root cause is that a `Cast` class in a required child's distribution does not have a `timeZoneId` field (`timeZoneId=None`), and a `Cast` class in `child.outputPartitioning` has it. So, this difference can make the distribution requirement check fail in `EnsureRequirements`:
> https://github.com/apache/spark/blob/1e85707738a830d33598ca267a6740b3f06b1861/sql/core/src/main/scala/org/apache/spark/sql/execution/exchange/EnsureRequirements.scala#L47-L50
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