error while running sbt assembly : sbt deduplication error

问题

I am facing the exact issue as described in the below post and the suggested answer is not helping. sbt-assembly: deduplication found error

[error] (*:assembly) deduplicate: different file contents found in the following:
[error] C:\Users\xxx\.ivy2\cache\org.eclipse.jetty.orbit\javax.transaction\orbits\javax.transaction-1.1.1.v201105210645.jar:META-INF/ECLIPSEF.RSA
[error] C:\Users\xxx\.ivy2\cache\org.eclipse.jetty.orbit\javax.servlet\orbits\javax.servlet-3.0.0.v201112011016.jar:META-INF/ECLIPSEF.RSA
[error] C:\Users\xxx\.ivy2\cache\org.eclipse.jetty.orbit\javax.mail.glassfish\orbits\javax.mail.glassfish-1.4.1.v201005082020.jar:META-INF/ECLIPSEF.RSA
[error] C:\Users\xxx\.ivy2\cache\org.eclipse.jetty.orbit\javax.activation\orbits\javax.activation-1.1.0.v201105071233.jar:META-INF/ECLIPSEF.RSA
[error] Total time: 14 s, completed Sep 9, 2014 5:21:01 PM

my build.sbt file contains

name := "Simple"

version := "0.1.0"

scalaVersion := "2.10.4"

libraryDependencies ++= Seq(
  "org.twitter4j" % "twitter4j-stream" % "3.0.3"
)

//libraryDependencies += "org.apache.spark" %% "spark-core" % "1.0.2"

libraryDependencies += "org.apache.spark" %% "spark-streaming" % "1.0.2"

libraryDependencies += "org.apache.spark" %% "spark-streaming-twitter" % "1.0.2"

libraryDependencies += "com.github.nscala-time" %% "nscala-time" % "0.4.2"

libraryDependencies ++= Seq(
    ("org.apache.spark"%%"spark-core"%"1.0.2").
    exclude("org.eclipse.jetty.orbit", "javax.servlet").
    exclude("org.eclipse.jetty.orbit", "javax.transaction").
    exclude("org.eclipse.jetty.orbit", "javax.mail").
    exclude("org.eclipse.jetty.orbit", "javax.activation").
    exclude("commons-beanutils", "commons-beanutils-core").
    exclude("commons-collections", "commons-collections").
    exclude("commons-collections", "commons-collections").
    exclude("com.esotericsoftware.minlog", "minlog")
)

resolvers += "Akka Repository" at "http://repo.akka.io/releases/"

    mergeStrategy in assembly <<= (mergeStrategy in assembly) { (old) =>
    {
        case PathList("javax", "servlet", xs @ _*)         => MergeStrategy.first
        case PathList("javax", "transaction", xs @ _*)     => MergeStrategy.first
        case PathList("javax", "mail", xs @ _*)     => MergeStrategy.first
        case PathList("javax", "activation", xs @ _*)     => MergeStrategy.first
        case PathList(ps @ _*) if ps.last endsWith ".html" => MergeStrategy.first
        case "application.conf" => MergeStrategy.concat
        case "unwanted.txt"     => MergeStrategy.discard
        case x => old(x)
        }
    }

Any pointers on how to fix the above issue?

回答1:

If you are planning to run your program from Spark, then I strongly recommend to add all Spark dependencies as provided so they will be excluded from assembly task.

libraryDependencies ++= Seq(
  "org.apache.spark" %% "spark-core"              % "1.0.2" % "provided",
  "org.apache.spark" %% "spark-streaming"         % "1.0.2" % "provided",
  "org.apache.spark" %% "spark-streaming-twitter" % "1.0.2" % "provided")

In the other case, you need to either remove those jars from classpath or to add appropriate lines to mergeStrategy, in your case it would be

case PathList("META-INF", "ECLIPSEF.RSA") => MergeStrategy.first

If you still wish to deal with Spark's dependencies hell, sbt-dependency-graph plugin should help. Also note that other Spark dependencies, like spark-streaming and spark-streaming-twitter probably needs exclude directive too.

回答2:

So in order to get the annoying "deduplicate" messages to go away I didn't bother with the exclude stuff, it didn't seem to help with me. I copied and pasted the defaultMergeStrategy from the sbt code and just changed the line where it says deduplicate to first. I also had to add a catch all at the end to insist upon first too. To be honest I have no idea what this means, or why it makes the annoying messages go away ... I don't have time to get a Phd in sbt, I want my code to just build!! So the merge strat becomes:

mergeStrategy in assembly <<= (mergeStrategy in assembly) ((old) => {
  case x if Assembly.isConfigFile(x) =>
    MergeStrategy.concat
  case PathList(ps @ _*) if Assembly.isReadme(ps.last) || Assembly.isLicenseFile(ps.last) =>
    MergeStrategy.rename
  case PathList("META-INF", xs @ _*) =>
    (xs map {_.toLowerCase}) match {
      case ("manifest.mf" :: Nil) | ("index.list" :: Nil) | ("dependencies" :: Nil) =>
        MergeStrategy.discard
      case ps @ (x :: xs) if ps.last.endsWith(".sf") || ps.last.endsWith(".dsa") =>
        MergeStrategy.discard
      case "plexus" :: xs =>
        MergeStrategy.discard
      case "services" :: xs =>
        MergeStrategy.filterDistinctLines
      case ("spring.schemas" :: Nil) | ("spring.handlers" :: Nil) =>
        MergeStrategy.filterDistinctLines
      case _ => MergeStrategy.first // Changed deduplicate to first
    }
  case PathList(_*) => MergeStrategy.first // added this line
})

来源：https://stackoverflow.com/questions/25744050/error-while-running-sbt-assembly-sbt-deduplication-error

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scala

sbt

apache-spark

sbt-assembly