It seems Spark has a dependency on scala-library_2.10.4 and this jar is already included in DAS pack, therefore copying scala-library-2.11.7.jar as per the documentation will lead to a conflict. I tested deleting ./repository/components/plugins/org.scala-lang.scala-library_2.10.4.v20140209-180020-VFINAL-b66a39653b.jar in DAS pack and it fixes the above error. But it give a NoClassDefFound error in startup.
AFAIU there's no straightforward way to workaround this issue as it requires to two different versions of the same .jar other than upgrading the Spark scla-library dependency. P.S : @Charith if this is for the sake of testing you can use CEP as it has not scala-libarary dependency.
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