title: Exception when "spark-shell --master yarn-client"
body: <p>When I run </p>
  
  <pre><code>spark-shell --master yarn-client
  </code></pre>
  
  <p>An error occurs as follows:</p>
  
  <pre><code>14/12/23 12:06:33 INFO client.RMProxy: Connecting to ResourceManager at main/10.20.236.201:8032
      14/12/23 12:06:33 INFO yarn.Client: Got cluster metric info from ResourceManager, number of NodeManagers: 2
      14/12/23 12:06:33 INFO yarn.Client: Max mem capabililty of a single resource in this cluster 2048
      14/12/23 12:06:33 INFO yarn.Client: Preparing Local resources
      java.lang.IllegalArgumentException: Can not create a Path from an empty string
          at org.apache.hadoop.fs.Path.checkPathArg(Path.java:127)
          at org.apache.hadoop.fs.Path.&lt;init&gt;(Path.java:135)
          at org.apache.hadoop.fs.Path.&lt;init&gt;(Path.java:94)
          at org.apache.spark.deploy.yarn.ClientBase$class.copyRemoteFile(ClientBase.scala:159)
          at org.apache.spark.deploy.yarn.Client.copyRemoteFile(Client.scala:37)
          at org.apache.spark.deploy.yarn.ClientBase$$anonfun$prepareLocalResources$5$$anonfun$apply$2.apply(ClientBase.scala:236)
          at org.apache.spark.deploy.yarn.ClientBase$$anonfun$prepareLocalResources$5$$anonfun$apply$2.apply(ClientBase.scala:231)
          at scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)
          at scala.collection.mutable.ArrayOps$ofRef.foreach(ArrayOps.scala:108)
          at org.apache.spark.deploy.yarn.ClientBase$$anonfun$prepareLocalResources$5.apply(ClientBase.scala:231)
          at org.apache.spark.deploy.yarn.ClientBase$$anonfun$prepareLocalResources$5.apply(ClientBase.scala:229)
          at scala.collection.immutable.List.foreach(List.scala:318)
          at org.apache.spark.deploy.yarn.ClientBase$class.prepareLocalResources(ClientBase.scala:229)
          at org.apache.spark.deploy.yarn.Client.prepareLocalResources(Client.scala:37)
          at org.apache.spark.deploy.yarn.Client.runApp(Client.scala:74)
          at org.apache.spark.scheduler.cluster.YarnClientSchedulerBackend.start(YarnClientSchedulerBackend.scala:92)
          at org.apache.spark.scheduler.TaskSchedulerImpl.start(TaskSchedulerImpl.scala:141)
          at org.apache.spark.SparkContext.&lt;init&gt;(SparkContext.scala:333)
          at org.apache.spark.repl.SparkILoop.createSparkContext(SparkILoop.scala:981)
          at $iwC$$iwC.&lt;init&gt;(&lt;console&gt;:8)
          at $iwC.&lt;init&gt;(&lt;console&gt;:14)
          at &lt;init&gt;(&lt;console&gt;:16)
          at .&lt;init&gt;(&lt;console&gt;:20)
          at .&lt;clinit&gt;(&lt;console&gt;)
          at .&lt;init&gt;(&lt;console&gt;:7)
          at .&lt;clinit&gt;(&lt;console&gt;)
          at $print(&lt;console&gt;)
          at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
          at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
          at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
          at java.lang.reflect.Method.invoke(Method.java:601)
          at org.apache.spark.repl.SparkIMain$ReadEvalPrint.call(SparkIMain.scala:789)
          at org.apache.spark.repl.SparkIMain$Request.loadAndRun(SparkIMain.scala:1062)
          at org.apache.spark.repl.SparkIMain.loadAndRunReq$1(SparkIMain.scala:615)
          at org.apache.spark.repl.SparkIMain.interpret(SparkIMain.scala:646)
          at org.apache.spark.repl.SparkIMain.interpret(SparkIMain.scala:610)
          at org.apache.spark.repl.SparkILoop.reallyInterpret$1(SparkILoop.scala:823)
          at org.apache.spark.repl.SparkILoop.interpretStartingWith(SparkILoop.scala:868)
          at org.apache.spark.repl.SparkILoop.command(SparkILoop.scala:780)
          at org.apache.spark.repl.SparkILoopInit$$anonfun$initializeSpark$1.apply(SparkILoopInit.scala:121)
          at org.apache.spark.repl.SparkILoopInit$$anonfun$initializeSpark$1.apply(SparkILoopInit.scala:120)
          at org.apache.spark.repl.SparkIMain.beQuietDuring(SparkIMain.scala:264)
          at org.apache.spark.repl.SparkILoopInit$class.initializeSpark(SparkILoopInit.scala:120)
          at org.apache.spark.repl.SparkILoop.initializeSpark(SparkILoop.scala:57)
          at org.apache.spark.repl.SparkILoop$$anonfun$process$1$$anonfun$apply$mcZ$sp$5.apply$mcV$sp(SparkILoop.scala:940)
          at org.apache.spark.repl.SparkILoopInit$class.runThunks(SparkILoopInit.scala:142)
          at org.apache.spark.repl.SparkILoop.runThunks(SparkILoop.scala:57)
          at org.apache.spark.repl.SparkILoopInit$class.postInitialization(SparkILoopInit.scala:104)
          at org.apache.spark.repl.SparkILoop.postInitialization(SparkILoop.scala:57)
          at org.apache.spark.repl.SparkILoop$$anonfun$process$1.apply$mcZ$sp(SparkILoop.scala:957)
          at org.apache.spark.repl.SparkILoop$$anonfun$process$1.apply(SparkILoop.scala:911)
          at org.apache.spark.repl.SparkILoop$$anonfun$process$1.apply(SparkILoop.scala:911)
          at scala.tools.nsc.util.ScalaClassLoader$.savingContextLoader(ScalaClassLoader.scala:135)
          at org.apache.spark.repl.SparkILoop.process(SparkILoop.scala:911)
          at org.apache.spark.repl.SparkILoop.process(SparkILoop.scala:1006)
          at org.apache.spark.repl.Main$.main(Main.scala:31)
          at org.apache.spark.repl.Main.main(Main.scala)
          at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
          at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
          at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
          at java.lang.reflect.Method.invoke(Method.java:601)
          at org.apache.spark.deploy.SparkSubmit$.launch(SparkSubmit.scala:329)
          at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:75)
          at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
  </code></pre>
  
  <p>This part of the error stands out:</p>
  
  <pre><code>java.lang.IllegalArgumentException: Can not create a Path from an empty string
  </code></pre>
  
  <p>How can I troubleshoot this error?</p>