Are you sure that your schema conversion is correct? If you're running with a recent Spark version, then that line is probably `name.hashCode()`. That file was last updated 6 months ago so I think it is likely that `name` is the null in your version.
On Tue, May 21, 2019 at 11:39 AM Andrew Melo <andrew.m...@gmail.com> wrote: > Hello, > > I'm developing a DataSourceV2 reader for the ROOT (https://root.cern/) > file format to replace a previous DSV1 source that was in use before. > > I have a bare skeleton of the reader, which can properly load the > files and pass their schema into Spark 2.4.3, but any operation on the > resulting DataFrame (except for printSchema()) causes an NPE deep in > the guts of spark [1]. I'm baffled, though, since both logging > statements and coverage says that neither planBatchInputPartitions nor > any of the methods in my partition class are called -- the only thing > called is readSchema and the constructors. > > I followed the pattern from "JavaBatchDataSourceV2.java" -- is it > possible that test-case isn't up to date? Are there any other example > Java DSV2 readers out in the wild I could compare against? > > Thanks! > Andrew > > [1] > > java.lang.NullPointerException > at > org.apache.spark.sql.catalyst.expressions.AttributeReference.hashCode(namedExpressions.scala:264) > at > scala.collection.mutable.FlatHashTable$class.findElemImpl(FlatHashTable.scala:129) > at > scala.collection.mutable.FlatHashTable$class.containsElem(FlatHashTable.scala:124) > at scala.collection.mutable.HashSet.containsElem(HashSet.scala:40) > at scala.collection.mutable.HashSet.contains(HashSet.scala:57) > at scala.collection.GenSetLike$class.apply(GenSetLike.scala:44) > at scala.collection.mutable.AbstractSet.apply(Set.scala:46) > at scala.collection.SeqLike$$anonfun$distinct$1.apply(SeqLike.scala:506) > at scala.collection.immutable.List.foreach(List.scala:392) > at scala.collection.SeqLike$class.distinct(SeqLike.scala:505) > at scala.collection.AbstractSeq.distinct(Seq.scala:41) > at > org.apache.spark.sql.catalyst.expressions.package$AttributeSeq$$anonfun$unique$1.apply(package.scala:147) > at > org.apache.spark.sql.catalyst.expressions.package$AttributeSeq$$anonfun$unique$1.apply(package.scala:147) > at > scala.collection.MapLike$MappedValues$$anonfun$foreach$3.apply(MapLike.scala:245) > at > scala.collection.MapLike$MappedValues$$anonfun$foreach$3.apply(MapLike.scala:245) > at > scala.collection.TraversableLike$WithFilter$$anonfun$foreach$1.apply(TraversableLike.scala:733) > at scala.collection.immutable.HashMap$HashMap1.foreach(HashMap.scala:221) > at > scala.collection.immutable.HashMap$HashTrieMap.foreach(HashMap.scala:428) > at > scala.collection.TraversableLike$WithFilter.foreach(TraversableLike.scala:732) > at scala.collection.MapLike$MappedValues.foreach(MapLike.scala:245) > at scala.collection.TraversableLike$class.map(TraversableLike.scala:234) > at scala.collection.AbstractTraversable.map(Traversable.scala:104) > at > org.apache.spark.sql.catalyst.expressions.package$AttributeSeq.unique(package.scala:147) > at > org.apache.spark.sql.catalyst.expressions.package$AttributeSeq.direct$lzycompute(package.scala:152) > at > org.apache.spark.sql.catalyst.expressions.package$AttributeSeq.direct(package.scala:151) > at > org.apache.spark.sql.catalyst.expressions.package$AttributeSeq.resolve(package.scala:229) > at > org.apache.spark.sql.catalyst.plans.logical.LogicalPlan.resolveChildren(LogicalPlan.scala:101) > at > org.apache.spark.sql.catalyst.analysis.Analyzer$ResolveReferences$$anonfun$40.apply(Analyzer.scala:890) > at > org.apache.spark.sql.catalyst.analysis.Analyzer$ResolveReferences$$anonfun$40.apply(Analyzer.scala:892) > at > org.apache.spark.sql.catalyst.analysis.package$.withPosition(package.scala:53) > at > org.apache.spark.sql.catalyst.analysis.Analyzer$ResolveReferences$.org$apache$spark$sql$catalyst$analysis$Analyzer$ResolveReferences$$resolve(Analyzer.scala:889) > at > org.apache.spark.sql.catalyst.analysis.Analyzer$ResolveReferences$$anonfun$org$apache$spark$sql$catalyst$analysis$Analyzer$ResolveReferences$$resolve$2.apply(Analyzer.scala:898) > at > org.apache.spark.sql.catalyst.analysis.Analyzer$ResolveReferences$$anonfun$org$apache$spark$sql$catalyst$analysis$Analyzer$ResolveReferences$$resolve$2.apply(Analyzer.scala:898) > at > org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$4.apply(TreeNode.scala:326) > at > org.apache.spark.sql.catalyst.trees.TreeNode.mapProductIterator(TreeNode.scala:187) > at > org.apache.spark.sql.catalyst.trees.TreeNode.mapChildren(TreeNode.scala:324) > at > org.apache.spark.sql.catalyst.analysis.Analyzer$ResolveReferences$.org$apache$spark$sql$catalyst$analysis$Analyzer$ResolveReferences$$resolve(Analyzer.scala:898) > at > org.apache.spark.sql.catalyst.analysis.Analyzer$ResolveReferences$$anonfun$apply$9$$anonfun$applyOrElse$35.apply(Analyzer.scala:958) > at > org.apache.spark.sql.catalyst.analysis.Analyzer$ResolveReferences$$anonfun$apply$9$$anonfun$applyOrElse$35.apply(Analyzer.scala:958) > at > org.apache.spark.sql.catalyst.plans.QueryPlan$$anonfun$1.apply(QueryPlan.scala:105) > at > org.apache.spark.sql.catalyst.plans.QueryPlan$$anonfun$1.apply(QueryPlan.scala:105) > at > org.apache.spark.sql.catalyst.trees.CurrentOrigin$.withOrigin(TreeNode.scala:70) > at > org.apache.spark.sql.catalyst.plans.QueryPlan.transformExpression$1(QueryPlan.scala:104) > at org.apache.spark.sql.catalyst.plans.QueryPlan.org > $apache$spark$sql$catalyst$plans$QueryPlan$$recursiveTransform$1(QueryPlan.scala:116) > at > org.apache.spark.sql.catalyst.plans.QueryPlan$$anonfun$org$apache$spark$sql$catalyst$plans$QueryPlan$$recursiveTransform$1$2.apply(QueryPlan.scala:121) > at > scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234) > at > scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234) > at > scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59) > at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:48) > at scala.collection.TraversableLike$class.map(TraversableLike.scala:234) > at scala.collection.AbstractTraversable.map(Traversable.scala:104) > at org.apache.spark.sql.catalyst.plans.QueryPlan.org > $apache$spark$sql$catalyst$plans$QueryPlan$$recursiveTransform$1(QueryPlan.scala:121) > at > org.apache.spark.sql.catalyst.plans.QueryPlan$$anonfun$2.apply(QueryPlan.scala:126) > at > org.apache.spark.sql.catalyst.trees.TreeNode.mapProductIterator(TreeNode.scala:187) > at > org.apache.spark.sql.catalyst.plans.QueryPlan.mapExpressions(QueryPlan.scala:126) > at > org.apache.spark.sql.catalyst.analysis.Analyzer$ResolveReferences$$anonfun$apply$9.applyOrElse(Analyzer.scala:958) > at > org.apache.spark.sql.catalyst.analysis.Analyzer$ResolveReferences$$anonfun$apply$9.applyOrElse(Analyzer.scala:901) > at > org.apache.spark.sql.catalyst.plans.logical.AnalysisHelper$$anonfun$resolveOperatorsUp$1$$anonfun$apply$1.apply(AnalysisHelper.scala:90) > at > org.apache.spark.sql.catalyst.plans.logical.AnalysisHelper$$anonfun$resolveOperatorsUp$1$$anonfun$apply$1.apply(AnalysisHelper.scala:90) > at > org.apache.spark.sql.catalyst.trees.CurrentOrigin$.withOrigin(TreeNode.scala:70) > at > org.apache.spark.sql.catalyst.plans.logical.AnalysisHelper$$anonfun$resolveOperatorsUp$1.apply(AnalysisHelper.scala:89) > at > org.apache.spark.sql.catalyst.plans.logical.AnalysisHelper$$anonfun$resolveOperatorsUp$1.apply(AnalysisHelper.scala:86) > at > org.apache.spark.sql.catalyst.plans.logical.AnalysisHelper$.allowInvokingTransformsInAnalyzer(AnalysisHelper.scala:194) > at > org.apache.spark.sql.catalyst.plans.logical.AnalysisHelper$class.resolveOperatorsUp(AnalysisHelper.scala:86) > at > org.apache.spark.sql.catalyst.plans.logical.LogicalPlan.resolveOperatorsUp(LogicalPlan.scala:29) > at > org.apache.spark.sql.catalyst.analysis.Analyzer$ResolveReferences$.apply(Analyzer.scala:901) > at > org.apache.spark.sql.catalyst.analysis.Analyzer$ResolveReferences$.apply(Analyzer.scala:758) > at > org.apache.spark.sql.catalyst.rules.RuleExecutor$$anonfun$execute$1$$anonfun$apply$1.apply(RuleExecutor.scala:87) > at > org.apache.spark.sql.catalyst.rules.RuleExecutor$$anonfun$execute$1$$anonfun$apply$1.apply(RuleExecutor.scala:84) > at > scala.collection.LinearSeqOptimized$class.foldLeft(LinearSeqOptimized.scala:124) > at scala.collection.immutable.List.foldLeft(List.scala:84) > at > org.apache.spark.sql.catalyst.rules.RuleExecutor$$anonfun$execute$1.apply(RuleExecutor.scala:84) > at > org.apache.spark.sql.catalyst.rules.RuleExecutor$$anonfun$execute$1.apply(RuleExecutor.scala:76) > at scala.collection.immutable.List.foreach(List.scala:392) > at > org.apache.spark.sql.catalyst.rules.RuleExecutor.execute(RuleExecutor.scala:76) > at org.apache.spark.sql.catalyst.analysis.Analyzer.org > $apache$spark$sql$catalyst$analysis$Analyzer$$executeSameContext(Analyzer.scala:127) > at > org.apache.spark.sql.catalyst.analysis.Analyzer.execute(Analyzer.scala:121) > at > org.apache.spark.sql.catalyst.analysis.Analyzer$$anonfun$executeAndCheck$1.apply(Analyzer.scala:106) > at > org.apache.spark.sql.catalyst.analysis.Analyzer$$anonfun$executeAndCheck$1.apply(Analyzer.scala:105) > at > org.apache.spark.sql.catalyst.plans.logical.AnalysisHelper$.markInAnalyzer(AnalysisHelper.scala:201) > at > org.apache.spark.sql.catalyst.analysis.Analyzer.executeAndCheck(Analyzer.scala:105) > at > org.apache.spark.sql.execution.QueryExecution.analyzed$lzycompute(QueryExecution.scala:57) > at > org.apache.spark.sql.execution.QueryExecution.analyzed(QueryExecution.scala:55) > at > org.apache.spark.sql.execution.QueryExecution.assertAnalyzed(QueryExecution.scala:47) > at org.apache.spark.sql.Dataset$.ofRows(Dataset.scala:78) > at org.apache.spark.sql.Dataset.org > $apache$spark$sql$Dataset$$withPlan(Dataset.scala:3406) > at org.apache.spark.sql.Dataset.select(Dataset.scala:1334) > at org.apache.spark.sql.Dataset.select(Dataset.scala:1352) > at org.apache.spark.sql.Dataset.select(Dataset.scala:1352) > at > edu.vanderbilt.accre.spark_ttree.TTreeDataSourceIntegrationTest.testLoadDataFrame(TTreeDataSourceIntegrationTest.java:47) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.lang.reflect.Method.invoke(Method.java:498) > at > org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47) > at > org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) > at > org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44) > at > org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) > at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271) > at > org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70) > at > org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50) > at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238) > at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63) > at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236) > at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53) > at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229) > at > org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26) > at > org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27) > at org.junit.runners.ParentRunner.run(ParentRunner.java:309) > at > org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:89) > at > org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:41) > at > org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:541) > at > org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:763) > at > org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:463) > at > org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:209)] > > --------------------------------------------------------------------- > To unsubscribe e-mail: dev-unsubscr...@spark.apache.org > > -- Ryan Blue Software Engineer Netflix
