Getting deduplicate error in scala

[Tamanampudi Sri Rama Reddy]

I am trying to use pushy 0.7.3  in my scala project. When i try to build a  fat jar using sbt (0.13.11)(which is pretty standard) always getting the deduplicate error as runtime exception. Issue seems like the naming issue between packages. Already tried various merge strategies in sbt but nothing worked. Does anyone faced similar kind of issue? or know the fix? 

Error log which i am getting when i included pushy in build.sbt:-

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

/root/.ivy2/cache/io.netty/netty-codec-http2/jars/netty-codec-http2-4.1.1.Final.jar:META-INF/io.netty.versions.properties

/root/.ivy2/cache/io.netty/netty-codec-http/jars/netty-codec-http-4.1.1.Final.jar:META-INF/io.netty.versions.properties

/root/.ivy2/cache/io.netty/netty-codec/jars/netty-codec-4.1.1.Final.jar:META-INF/io.netty.versions.properties

/root/.ivy2/cache/io.netty/netty-transport/jars/netty-transport-4.1.1.Final.jar:META-INF/io.netty.versions.properties

/root/.ivy2/cache/io.netty/netty-buffer/jars/netty-buffer-4.1.1.Final.jar:META-INF/io.netty.versions.properties

/root/.ivy2/cache/io.netty/netty-common/jars/netty-common-4.1.1.Final.jar:META-INF/io.netty.versions.properties

/root/.ivy2/cache/io.netty/netty-resolver/jars/netty-resolver-4.1.1.Final.jar:META-INF/io.netty.versions.properties

/root/.ivy2/cache/io.netty/netty-handler/jars/netty-handler-4.1.1.Final.jar:META-INF/io.netty.versions.properties

/root/.ivy2/cache/io.netty/netty-handler-proxy/jars/netty-handler-proxy-4.1.1.Final.jar:META-INF/io.netty.versions.properties

/root/.ivy2/cache/io.netty/netty-codec-socks/jars/netty-codec-socks-4.1.1.Final.jar:META-INF/io.netty.versions.properties

at sbtassembly.Assembly$.applyStrategies(Assembly.scala:140)

at sbtassembly.Assembly$.x$1$lzycompute$1(Assembly.scala:25)

at sbtassembly.Assembly$.x$1$1(Assembly.scala:23)

at sbtassembly.Assembly$.stratMapping$lzycompute$1(Assembly.scala:23)

at sbtassembly.Assembly$.stratMapping$1(Assembly.scala:23)

at sbtassembly.Assembly$.inputs$lzycompute$1(Assembly.scala:67)

at sbtassembly.Assembly$.inputs$1(Assembly.scala:57)

at sbtassembly.Assembly$.apply(Assembly.scala:83)

at sbtassembly.Assembly$$anonfun$assemblyTask$1.apply(Assembly.scala:241)

at sbtassembly.Assembly$$anonfun$assemblyTask$1.apply(Assembly.scala:238)

at scala.Function1$$anonfun$compose$1.apply(Function1.scala:47)

at sbt.$tilde$greater$$anonfun$$u2219$1.apply(TypeFunctions.scala:40)

at sbt.std.Transform$$anon$4.work(System.scala:63)

at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:228)

at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:228)

at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:17)

at sbt.Execute.work(Execute.scala:237)

at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:228)

at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:228)

at sbt.ConcurrentRestrictions$$anon$4$$anonfun$1.apply(ConcurrentRestrictions.scala:159)

at sbt.CompletionService$$anon$2.call(CompletionService.scala:28)

at java.util.concurrent.FutureTask.run(FutureTask.java:266)

at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)

at java.util.concurrent.FutureTask.run(FutureTask.java:266)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

at java.lang.Thread.run(Thread.java:745)

[error] (*:assembly) deduplicate: different file contents found in the following:

[error] /root/.ivy2/cache/io.netty/netty-codec-http2/jars/netty-codec-http2-4.1.1.Final.jar:META-INF/io.netty.versions.properties

[error] /root/.ivy2/cache/io.netty/netty-codec-http/jars/netty-codec-http-4.1.1.Final.jar:META-INF/io.netty.versions.properties

[error] /root/.ivy2/cache/io.netty/netty-codec/jars/netty-codec-4.1.1.Final.jar:META-INF/io.netty.versions.properties

[error] /root/.ivy2/cache/io.netty/netty-transport/jars/netty-transport-4.1.1.Final.jar:META-INF/io.netty.versions.properties

[error] /root/.ivy2/cache/io.netty/netty-buffer/jars/netty-buffer-4.1.1.Final.jar:META-INF/io.netty.versions.properties

[error] /root/.ivy2/cache/io.netty/netty-common/jars/netty-common-4.1.1.Final.jar:META-INF/io.netty.versions.properties

[error] /root/.ivy2/cache/io.netty/netty-resolver/jars/netty-resolver-4.1.1.Final.jar:META-INF/io.netty.versions.properties

[error] /root/.ivy2/cache/io.netty/netty-handler/jars/netty-handler-4.1.1.Final.jar:META-INF/io.netty.versions.properties

[error] /root/.ivy2/cache/io.netty/netty-handler-proxy/jars/netty-handler-proxy-4.1.1.Final.jar:META-INF/io.netty.versions.properties

[error] /root/.ivy2/cache/io.netty/netty-codec-socks/jars/netty-codec-socks-4.1.1.Final.jar:META-INF/io.netty.versions.properties

[error] Total time: 149 s, completed 20 Jun, 2016 6:49:34 PM

sriram@YuppTv-Sriram:~/repos/freedocast_scala/Freedocast$ scala -version

Scala code runner version 2.11.7 -- Copyright 2002-2013, LAMP/EPFL

sriram@YuppTv-Sriram:~/repos/freedocast_scala/Freedocast$ sbt -version

[info] Loading global plugins from /home/sriram/.sbt/0.13/plugins

[info] Updating {file:/home/sriram/.sbt/0.13/plugins/}global-plugins...

[info] Resolving org.scala-sbt#main;0.13.11 ...

Thanks,

Sriram 

[Kenji Yoshida]

Hi sriram. please try to following setting

assemblyMergeStrategy in assembly <<= (assemblyMergeStrategy in assembly) {

  old => {

    case PathList("META-INF", "io.netty.versions.properties", xs @ _*) => MergeStrategy.last

    case x => old(x)

  }

}