我有一个应该执行数据准备步骤的 Spark 应用程序。我编写了一些单元测试来使用 deequ 检查数据质量，并且像往常一样，我想运行我的一个单元测试，但是我遇到了如下错误：
Error while instantiating 'org.apache.spark.sql.internal.SessionStateBuilder':
java.lang.IllegalArgumentException: Error while instantiating 'org.apache.spark.sql.internal.SessionStateBuilder':
at org.apache.spark.sql.SparkSession$.org$apache$spark$sql$SparkSession$$instantiateSessionState(SparkSession.scala:1148)
at org.apache.spark.sql.SparkSession.$anonfun$sessionState$2(SparkSession.scala:159)
at scala.Option.getOrElse(Option.scala:189)
at org.apache.spark.sql.SparkSession.sessionState$lzycompute(SparkSession.scala:155)
at org.apache.spark.sql.SparkSession.sessionState(SparkSession.scala:152)
at org.apache.spark.sql.DataFrameReader.<init>(DataFrameReader.scala:997)
at org.apache.spark.sql.SparkSession.read(SparkSession.scala:658)
at com.bigelectrons.housingml.dataprep.HousingDataTest.$anonfun$new$1(HousingDataTest.scala:32)
at org.scalatest.OutcomeOf.outcomeOf(OutcomeOf.scala:85)
at org.scalatest.OutcomeOf.outcomeOf$(OutcomeOf.scala:83)
at org.scalatest.OutcomeOf$.outcomeOf(OutcomeOf.scala:104)
at org.scalatest.Transformer.apply(Transformer.scala:22)
at org.scalatest.Transformer.apply(Transformer.scala:20)
at org.scalatest.FlatSpecLike$$anon$1.apply(FlatSpecLike.scala:1682)
at org.scalatest.TestSuite.withFixture(TestSuite.scala:196)
at org.scalatest.TestSuite.withFixture$(TestSuite.scala:195)
at org.scalatest.FlatSpec.withFixture(FlatSpec.scala:1685)
at org.scalatest.FlatSpecLike.invokeWithFixture$1(FlatSpecLike.scala:1680)
at org.scalatest.FlatSpecLike.$anonfun$runTest$1(FlatSpecLike.scala:1692)
at org.scalatest.SuperEngine.runTestImpl(Engine.scala:289)
at org.scalatest.FlatSpecLike.runTest(FlatSpecLike.scala:1692)
at org.scalatest.FlatSpecLike.runTest$(FlatSpecLike.scala:1674)
at org.scalatest.FlatSpec.runTest(FlatSpec.scala:1685)
at org.scalatest.FlatSpecLike.$anonfun$runTests$1(FlatSpecLike.scala:1750)
at org.scalatest.SuperEngine.$anonfun$runTestsInBranch$1(Engine.scala:396)
at scala.collection.immutable.List.foreach(List.scala:431)
at org.scalatest.SuperEngine.traverseSubNodes$1(Engine.scala:384)
at org.scalatest.SuperEngine.runTestsInBranch(Engine.scala:373)
at org.scalatest.SuperEngine.$anonfun$runTestsInBranch$1(Engine.scala:410)
at scala.collection.immutable.List.foreach(List.scala:431)
at org.scalatest.SuperEngine.traverseSubNodes$1(Engine.scala:384)
at org.scalatest.SuperEngine.runTestsInBranch(Engine.scala:379)
at org.scalatest.SuperEngine.runTestsImpl(Engine.scala:461)
at org.scalatest.FlatSpecLike.runTests(FlatSpecLike.scala:1750)
at org.scalatest.FlatSpecLike.runTests$(FlatSpecLike.scala:1749)
at org.scalatest.FlatSpec.runTests(FlatSpec.scala:1685)
at org.scalatest.Suite.run(Suite.scala:1147)
at org.scalatest.Suite.run$(Suite.scala:1129)
at org.scalatest.FlatSpec.org$scalatest$FlatSpecLike$$super$run(FlatSpec.scala:1685)
at org.scalatest.FlatSpecLike.$anonfun$run$1(FlatSpecLike.scala:1795)
at org.scalatest.SuperEngine.runImpl(Engine.scala:521)
at org.scalatest.FlatSpecLike.run(FlatSpecLike.scala:1795)
at org.scalatest.FlatSpecLike.run$(FlatSpecLike.scala:1793)
at com.bigelectrons.housingml.dataprep.HousingDataTest.org$scalatest$BeforeAndAfterAll$$super$run(HousingDataTest.scala:20)
at org.scalatest.BeforeAndAfterAll.liftedTree1$1(BeforeAndAfterAll.scala:213)
at org.scalatest.BeforeAndAfterAll.run(BeforeAndAfterAll.scala:210)
at org.scalatest.BeforeAndAfterAll.run$(BeforeAndAfterAll.scala:208)
at com.bigelectrons.housingml.dataprep.HousingDataTest.run(HousingDataTest.scala:20)
at org.scalatest.tools.SuiteRunner.run(SuiteRunner.scala:45)
at org.scalatest.tools.Runner$.$anonfun$doRunRunRunDaDoRunRun$13(Runner.scala:1346)
at org.scalatest.tools.Runner$.$anonfun$doRunRunRunDaDoRunRun$13$adapted(Runner.scala:1340)
at scala.collection.immutable.List.foreach(List.scala:431)
at org.scalatest.tools.Runner$.doRunRunRunDaDoRunRun(Runner.scala:1340)
at org.scalatest.tools.Runner$.$anonfun$runOptionallyWithPassFailReporter$24(Runner.scala:1031)
at org.scalatest.tools.Runner$.$anonfun$runOptionallyWithPassFailReporter$24$adapted(Runner.scala:1010)
at org.scalatest.tools.Runner$.withClassLoaderAndDispatchReporter(Runner.scala:1506)
at org.scalatest.tools.Runner$.runOptionallyWithPassFailReporter(Runner.scala:1010)
at org.scalatest.tools.Runner$.run(Runner.scala:850)
at org.scalatest.tools.Runner.run(Runner.scala)
at org.jetbrains.plugins.scala.testingSupport.scalaTest.ScalaTestRunner.runScalaTest2or3(ScalaTestRunner.java:38)
at org.jetbrains.plugins.scala.testingSupport.scalaTest.ScalaTestRunner.main(ScalaTestRunner.java:25)
Caused by: java.lang.IllegalStateException: LiveListenerBus is stopped.
at org.apache.spark.scheduler.LiveListenerBus.addToQueue(LiveListenerBus.scala:97)
at org.apache.spark.scheduler.LiveListenerBus.addToStatusQueue(LiveListenerBus.scala:80)
at org.apache.spark.sql.internal.SharedState.<init>(SharedState.scala:99)
at org.apache.spark.sql.SparkSession.$anonfun$sharedState$1(SparkSession.scala:138)
at scala.Option.getOrElse(Option.scala:189)
at org.apache.spark.sql.SparkSession.sharedState$lzycompute(SparkSession.scala:138)
at org.apache.spark.sql.SparkSession.sharedState(SparkSession.scala:137)
at org.apache.spark.sql.internal.BaseSessionStateBuilder.build(BaseSessionStateBuilder.scala:335)
at org.apache.spark.sql.SparkSession$.org$apache$spark$sql$SparkSession$$instantiateSessionState(SparkSession.scala:1145)
... 60 more
以下是我访问 Spark 会话的方法：
val spark: SparkSession = SparkSession.builder().config("spark.master", "local").appName("housing-data-test").getOrCreate()
这是我的实际代码：
"simple unit test" should "check for data correctness" in {
appCfgT match {
case Success(appCfg) =>
preStart()
val rawDF: DataFrame = spark
.read
.format("csv")
.option("delimiter", ",")
.option("timestampFormat", "yyyy/MM/dd HH:mm:ss ZZ")
.option("inferSchema", value = true)
.option("mode", "DROPMALFORMED")
.option("header", value = true)
.option("multiLine", value = true)
.schema(encodedHousingSchema)
.load(appCfg.sourceFileUrl)
DataTestUtils.withSpark { session =>
val rows = session.sparkContext.parallelize(Seq(new HousingModel()))
val data = session.createDataFrame(rows)
println("******************************************************************************")
val verificationResult = VerificationSuite()
.onData(data)
.addCheck(
Check(CheckLevel.Error, "unit testing my data")
.hasSize(_ == 4092) // we expect 4092 rows
.isComplete("id") // should never be NULL
.isUnique("id") // should not contain duplicates
.isComplete("productName") // should never be NULL
// should only contain the values "high" and "low"
.isContainedIn("priority", Array("high", "low"))
.isNonNegative("numViews") // should not contain negative values
// at least half of the descriptions should contain a url
.containsURL("description", _ >= 0.5)
// half of the items should have less than 10 views
.hasApproxQuantile("numViews", 0.5, _ <= 10)
)
.run()
}
case Failure(fail) =>
// TODO: Fail the unit test!
}
}