使用sbt-assembly在SBT中的uber-jar創建中的文件沖突

Question

我正在嘗試使用SBT編譯和打包胖罐子，並且不斷遇到以下錯誤。 我已經嘗試過使用庫依賴排除和合並的所有方法。

[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文件的當前版本如下：

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"

我意識到自己做錯了...我只是不知道該怎么辦。

Answer 1

這是處理這些合並問題的方法。

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)
        }
    }
)

然后將這些設置添加到您的項目。

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

Answer 2

我通過從胖子罐中移除火花來運行您的程序集構建（ mllib已經包含在spark中 ）。

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

就像vitalii在評論中說的那樣，此解決方案已經在這里 。 我了解在問題上花費數小時而找不到解決方法可能會令人沮喪，但請保持友好 。