使用sbt-assembly在SBT中的uber-jar创建中的文件冲突

Question

我正在尝试使用SBT编译和打包胖罐子，并且不断遇到以下错误。 我已经尝试过使用库依赖排除和合并的所有方法。

[trace] Stack trace suppressed: run last *:assembly for the full output.
[error] (*:assembly) deduplicate: different file contents found in the     following:
[error] /Users/me/.ivy2/cache/org.slf4j/slf4j-api/jars/slf4j-api-1    .7.10.jar:META-INF/maven/org.slf4j/slf4j-api/pom.properties
[error] /Users/me/.ivy2/cache/com.twitter/parquet-format/jars/parquet-format-2.2.0-rc1.jar:META-INF/maven/org.slf4j/slf4j-api/pom.properties
[error] Total time: 113 s, completed Jul 10, 2015 1:57:21 AM

我的build.sbt文件的当前版本如下：

import AssemblyKeys._

assemblySettings

name := "ldaApp"

version := "0.1"

scalaVersion := "2.10.4"

mainClass := Some("myApp")

libraryDependencies +="org.scalanlp" %% "breeze" % "0.11.2"

libraryDependencies +="org.scalanlp" %% "breeze-natives" % "0.11.2"

libraryDependencies += "org.apache.spark" % "spark-mllib_2.10" % "1.3.1"

libraryDependencies +="org.ini4j" % "ini4j" % "0.5.4"

jarName in assembly := "myApp"

net.virtualvoid.sbt.graph.Plugin.graphSettings

libraryDependencies += "org.slf4j" %% "slf4j-api"" % "1.7.10" % "provided"

我意识到自己做错了...我只是不知道该怎么办。

Answer 1

这是处理这些合并问题的方法。

import sbtassembly.Plugin._

lazy val assemblySettings = sbtassembly.Plugin.assemblySettings ++ Seq(
    publishArtifact in packageScala := false, // Remove scala from the uber jar
    mergeStrategy in assembly <<= (mergeStrategy in assembly) { (old) =>
        {
            case PathList("META-INF", "CHANGES.txt") => MergeStrategy.first
            // ...
            case PathList(ps @ _*) if ps.last endsWith "pom.properties" => MergeStrategy.first
            case x => old(x)
        }
    }
)

然后将这些设置添加到您的项目。

lazy val projectToJar = Project(id = "MyApp", base = file(".")).settings(assemblySettings: _*)

Answer 2

我通过从胖子罐中移除火花来运行您的程序集构建（ mllib已经包含在spark中 ）。

libraryDependencies += "org.apache.spark" %% "spark-mllib" % "1.3.1" % "provided"

就像vitalii在评论中说的那样，此解决方案已经在这里 。 我了解在问题上花费数小时而找不到解决方法可能会令人沮丧，但请保持友好 。