title: Problems adding Apache Spark to Eclipse Maven project
body: <p>I am attempting to add Apache Spark MLlib as a dependency for a Maven project in Eclipse.  I have the Maven plugin, so adding dependencies is usually as easy as entering in the address (don't even have to touch the pom.xml). When I tried to add MLlib, I got the error:</p>
  
  <p>"Archive for the required library (location of spark-core jar) cannot be read or is not a valid zip file"</p>
  
  <p>So I went and added that jar as a dependency as well, but the error continued to happen, just with different jars (hadoop was next, then snappy-java, etc) with more and more dependencies needing to be added.  Eventually, I seemed to have added all the required dependencies, but the error just looped back to the hadoop one:</p>
  
  <p>"Archive for the required library (location of hadoop jar) cannot be read...."</p>
  
  <p>When I tried to remove and re-add these, it just continued to loop through all of them again.  I 'm pretty new to Maven so maybe I'm missing something major, but I am very confused.</p>