SBT assembly : MergeStrategy error

[Ram]

I have included sbt assembly to my sbt. 

I have set retrieveManaged := true. When I run sbt assembly, I get this error - 

java.lang.RuntimeException: deduplicate: different file contents found in the following:

/home/user/parse/scala/AnonApp/lib_managed/jars/org.mortbay.jetty/servlet-api/servlet-api-2.5-20081211.jar:javax/servlet/SingleThreadModel.class

/home/user/parse/scala/AnonApp/lib_managed/orbits/org.eclipse.jetty.orbit/javax.servlet/javax.servlet-2.5.0.v201103041518.jar:javax/servlet/SingleThreadModel.class

Seeing this error, as per README in github, I have MergeStrategy like, 

To exclude the javax library while merging, but it doesn't seem to help. 

mergeStrategy in assembly <<= (mergeStrategy in assembly) { (old) =>

  {

    case PathList("javax", "servlet", xs @ _*)         => MergeStrategy.discard

    case PathList(ps @ _*) if ps.last endsWith ".html" => MergeStrategy.discard

    case "application.conf" => MergeStrategy.concat

    case "unwanted.txt"     => MergeStrategy.discard

    case x => old(x)

  }

}

How do I workaround the issue, any help would be appreciated! Thanks!

[Seth Tisue]

already answered at
http://stackoverflow.com/questions/19606243/sbt-assembly-mergestrategy-error

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