DeDuplication error with SBT assembly plugin

Question

I am trying to create an executable jar using SBT assembly plugin.

I am ending up with below error :

[error] (app/*:assembly) deduplicate: differen         


        

Answer 1

Your MergeStrategy looks correct. The only unhandled conflicts are "about.html" in the jetty jars, so case "about.html" => MergeStrategy.discard should just do it.

If you're still getting the error, I suspect that re-wiring of the mergeStrategy in assembly setting is either not going in, or going in the wrong order. The only way to know for sure is to see your Build.scala. @Stefan Ollinger's answer to your linked question for example sets up the project as follows:

lazy val project = Project("myProj", file(".")).
  settings(mySettings: _*).
  settings(myAssemblySettings:_*)

Could you post your Build.scala on gist if possible?