使用SBT测试运行时Spark测试失败

我们已经编写了具有4个线程的本地模式下的Spark单元测试。

例如通过intellij或sbt testOnly一次启动时，每个测试运行正常。

使用sbt测试启动时，它们会失败，并显示以下错误：

[info] java.util.ServiceConfigurationError: org.apache.spark.sql.sources.DataSourceRegister: Provider org.apache.spark.sql.execution.datasources.csv.CSVFileFormat not a subtype

我们特别将sbt和spark版本升级到了最新版本，并尝试fork in test := true在build.sbt中运行，但这没有帮助。

Spark在2.4.3版本，sbt 1.2.8和2.12.8版本的scala中。

sbt config没什么特别的：

libraryDependencies ++= Seq(
  Dependencies.Test.concordion,
  Dependencies.`spark-sql` exclude("org.slf4j","slf4j-log4j12"),
  Dependencies.`better-files`
)

fork in test := true


dependencyOverrides += "com.google.guava" % "guava" % "11.0.2" 
dependencyOverrides += "com.fasterxml.jackson.core" % "jackson-databind" % "2.6.7.1"

我们将sbt项目与多个子项目一起使用，定义方式如下：

scalacOptions in ThisBuild ++= Seq(
  "-encoding", "UTF-8", // source files are in UTF-8
  "-deprecation", // warn about use of deprecated APIs
  "-Yrangepos", // use range positions for syntax trees
  "-language:postfixOps", //  enables postfix operators
  "-language:implicitConversions", // enables defining implicit methods and members
  "-language:existentials", // enables writing existential types
  "-language:reflectiveCalls", // enables reflection
  "-language:higherKinds", // allow higher kinded types without `import scala.language.higherKinds`
  "-unchecked", // warn about unchecked type parameters
  "-feature", // warn about misused language features
  /*"-Xlint",               // enable handy linter warnings
    "-Xfatal-warnings",     // turn compiler warnings into errors*/
  "-Ypartial-unification" // allow the compiler to unify type constructors of different arities
)

autoCompilerPlugins := true

addCompilerPlugin(Dependencies.`kind-projector`)
addCompilerPlugin(Dependencies.`better-monadic-for`)


// Define the root project, and make it compile all child projects
lazy val `datarepo` =
  project
    .in(file("."))
    .aggregate(
      `foo`,
      `foo-other`,
      `sparkusingproject`,
      `sparkusingproject-test`,
      `sparkusingproject-other`,
    )

// Define individual projects, the directories they reside in, and other projects they depend on
lazy val `foo` =
  project
    .in(file("foo"))
    .settings(Common.defaultSettings: _*)

lazy val `foo-other` =
  project
    .in(file("foo-other"))
    .dependsOn(`foo`)
    .settings(Common.defaultSettings: _*)