Question

我使用spark-cloudant依赖项进行sbt管理的Spark项目。代码为available on GitHub (on spark-cloudant-compile-issue branch)。

我已将以下行添加到build.sbt：

"cloudant-labs" % "spark-cloudant" % "1.6.4-s_2.10" % "provided"

所以build.sbt如下所示：

name := "Movie Rating"

version := "1.0"

scalaVersion := "2.10.5"

libraryDependencies ++= {
  val sparkVersion =  "1.6.0"
  Seq(
     "org.apache.spark" %% "spark-core" % sparkVersion % "provided",
     "org.apache.spark" %% "spark-sql" % sparkVersion % "provided",
     "org.apache.spark" %% "spark-streaming" % sparkVersion % "provided",
     "org.apache.spark" %% "spark-streaming-kafka" % sparkVersion % "provided",
     "org.apache.spark" %% "spark-mllib" % sparkVersion % "provided",
     "org.apache.kafka" % "kafka-log4j-appender" % "0.9.0.0",
     "org.apache.kafka" % "kafka-clients" % "0.9.0.0",
     "org.apache.kafka" %% "kafka" % "0.9.0.0",
     "cloudant-labs" % "spark-cloudant" % "1.6.4-s_2.10" % "provided"
    )
}

assemblyMergeStrategy in assembly := {
  case PathList("org", "apache", "spark", xs @ _*) => MergeStrategy.first
  case PathList("scala", xs @ _*) => MergeStrategy.discard
  case PathList("META-INF", "maven", "org.slf4j", xs @ _* ) => MergeStrategy.first
  case x =>
    val oldStrategy = (assemblyMergeStrategy in assembly).value
    oldStrategy(x)
}

unmanagedBase <<= baseDirectory { base => base / "lib" }

assemblyOption in assembly := (assemblyOption in assembly).value.copy(includeScala = false)

当我执行sbt assembly时，我收到以下错误：

java.lang.RuntimeException: Please add any Spark dependencies by 
   supplying the sparkVersion and sparkComponents. Please remove: 
   org.apache.spark:spark-core:1.6.0:provided

Answer 1

可能相关：https://github.com/databricks/spark-csv/issues/150

您可以尝试将spIgnoreProvided := true添加到build.sbt吗？

（这可能不是答案，我本来可以发表评论，但我没有足够的声誉）

Answer 2

注意我仍然无法重现这个问题，但认为这并不重要。

java.lang.RuntimeException：请通过提供sparkVersion和sparkComponents来添加任何Spark依赖项。

在您的情况下，您的build.sbt错过了sbt解析程序来查找spark-cloudant依赖项。您应该将以下行添加到build.sbt：

resolvers += "spark-packages" at "https://dl.bintray.com/spark-packages/maven/"

PROTIP 我强烈建议您首先使用spark-shell，并且只有当您对包裹切换到sbt时才会感到舒服（特别是如果您不熟悉sbt，或许是其他库/依赖项也是如此）。一口气消化太多了。关注https://spark-packages.org/package/cloudant-labs/spark-cloudant。

为什么Spark项目中的sbt程序集失败了“请通过提供sparkVersion和sparkComponents添加任何Spark依赖项”？

2 个答案: