为什么错误交叉版本后缀相互冲突？

Question

当我试图在sbt中编译Scala项目时，会遇到这个错误。

Modules were resolved with conflicting cross-version suffixes in {file:/home/seven3n/caja/Flujo_de_caja/}flujo_de_caja:
[error]    com.typesafe.akka:akka-actor _2.11, _2.10
[error]    org.scalaz:scalaz-effect _2.10, _2.11
[error]    org.scalaz:scalaz-core _2.10, _2.11
[trace] Stack trace suppressed: run last *:update for the full output.
[error] (*:update) Conflicting cross-version suffixes in: com.typesafe.akka:akka-actor, org.scalaz:scalaz-effect, org.scalaz:scalaz-core

这是我的build.sbt文件：

scalaVersion := "2.11.0"

resolvers ++= Seq(
  "Sonatype snapshots repository" at "https://oss.sonatype.org/content/repositories/snapshots/",
  "Spray repository" at "http://repo.spray.io/",
  "Typesafe repository" at "http://repo.typesafe.com/typesafe/releases/"
)

libraryDependencies ++= {
  val akkaVersion = "2.3.2"
  val sprayVersion = "1.3.1-20140423"
  val sprayJsonVersion = "1.2.6"
  val reactiveMongoVersion = "0.11.0-SNAPSHOT"
  val scalaTestVersion = "2.1.5"
  val specs2Version = "2.3.11"
  val foloneVersion = "0.12-SNAPSHOT"
  Seq(
    "com.typesafe.akka" %% "akka-actor"        % akkaVersion,
    "com.typesafe.akka" %% "akka-testkit"      % akkaVersion,
    "io.spray"          %% "spray-can"         % sprayVersion,
    "io.spray"          %% "spray-routing"     % sprayVersion,
    "io.spray"          %% "spray-testkit"     % sprayVersion,
    "io.spray"          %% "spray-json"        % sprayJsonVersion,
    "org.reactivemongo" % "reactivemongo_2.10" % reactiveMongoVersion,
    "org.scalatest"     %% "scalatest"         % scalaTestVersion % "test",
    "org.specs2"        %% "specs2"            % specs2Version % "test",
    "info.folone"       % "poi-scala_2.10"     % foloneVersion
  )
}

有什么建议吗？

Answer 1

出现这些冲突是因为：

1. 您已经将Scala版本指定为2.11
2. 您已经为reactivemongo和poi库显式地指定了Scala版本(2.10)。

修复方法也是为这两个库使用%%操作符。

"org.reactivemongo" %% "reactivemongo" % reactiveMongoVersion,
"info.folone"       %% "poi-scala"     % foloneVersion

这就是%%操作符的目的。将声明的Scala版本(在本例中为2.11)附加到工件名称。

Answer 2

我也遇到了同样的问题，我只是从sbt文件中删除了scalaVersion标记并修改了行。

libraryDependencies += "org.apache.spark" %% "spark-core" % "1.6.0"

至

libraryDependencies += "org.apache.spark" % "spark-core_2.11" % "1.6.0"

问题就消失了。

Answer 3

我试过使用%%，但没有起作用。我已经手动排除它使用

("org.reactivemongo" % "reactivemongo" % reactiveMongoVersion)
    .exclude("com.typesafe.akka", "akka-actor_2.10")
    .exclude("org.scalaz", "scalaz-effect")
    .exclude("org.scalaz", "scalaz-core")