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https://issues.apache.org/jira/browse/SPARK-31384?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan reassigned SPARK-31384:
-----------------------------------
Assignee: wuyi
> NPE in OptimizeSkewedJoin when there's a inputRDD of plan has 0 partition
> -------------------------------------------------------------------------
>
> Key: SPARK-31384
> URL: https://issues.apache.org/jira/browse/SPARK-31384
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: wuyi
> Assignee: wuyi
> Priority: Major
>
> When there's a inputRDD of a plan with 0 partitions, rule OptimizeSkewedJoin
> can hit NPE.
> The issue can be reproduced by below test:
> {code:java}
> withSQLConf(SQLConf.ADAPTIVE_EXECUTION_ENABLED.key -> "true",
> SQLConf.AUTO_BROADCASTJOIN_THRESHOLD.key -> "-1") {
> withTempView("t2") {
> // create DataFrame with 0 partition
> spark.createDataFrame(sparkContext.emptyRDD[Row], new
> StructType().add("b", IntegerType))
> .createOrReplaceTempView("t2")
> // should run successfully without NPE
> runAdaptiveAndVerifyResult("SELECT * FROM testData2 t1 left semi join t2
> ON t1.a=t2.b")
> }
> }
> {code}
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