Github user tgravescs commented on a diff in the pull request:

    https://github.com/apache/spark/pull/2350#discussion_r17786722
  
    --- Diff: 
yarn/common/src/main/scala/org/apache/spark/deploy/yarn/ClientDistributedCacheManager.scala
 ---
    @@ -19,29 +19,24 @@ package org.apache.spark.deploy.yarn
     
     import java.net.URI
     
    +import scala.collection.mutable.{HashMap, LinkedHashMap, Map}
    +
     import org.apache.hadoop.conf.Configuration
    -import org.apache.hadoop.fs.FileStatus
    -import org.apache.hadoop.fs.FileSystem
    -import org.apache.hadoop.fs.Path
    +import org.apache.hadoop.fs.{FileStatus, FileSystem, Path}
     import org.apache.hadoop.fs.permission.FsAction
    -import org.apache.hadoop.yarn.api.records.LocalResource
    -import org.apache.hadoop.yarn.api.records.LocalResourceVisibility
    -import org.apache.hadoop.yarn.api.records.LocalResourceType
    +import org.apache.hadoop.yarn.api.records._
    --- End diff --
    
    just curious, why change this to ._ and all the others to {}?    I'm not 
sure if we have a standard for that?  Generally I go for explicitly listing 
them the ones out I'm using.


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