title: Why spark-shell fails with NullPointerException?
body: <p>I try to execute <code>spark-shell</code> on Windows 10, but I keep getting this error every time I run it.</p>
  
  <p>I used both latest and spark-1.5.0-bin-hadoop2.4 versions.</p>
  
  <pre><code>15/09/22 18:46:24 WARN Connection: BoneCP specified but not present in     
  CLASSPATH (or one of dependencies)
  15/09/22 18:46:24 WARN Connection: BoneCP specified but not present in                 CLASSPATH (or one of dependencies)
  15/09/22 18:46:27 WARN ObjectStore: Version information not found in    
  metastore. hive.metastore.schema.verification is not enabled so recording the schema version 1.2.0
  15/09/22 18:46:27 WARN ObjectStore: Failed to get database default, returning NoSuchObjectException
  15/09/22 18:46:27 WARN : Your hostname, DESKTOP-8JS2RD5 resolves to a loopback/non-reachable address: fe80:0:0:0:0:5efe:c0a8:103%net1, but we couldn't find any external IP address!
  java.lang.RuntimeException: java.lang.NullPointerException
      at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:522)
      at org.apache.spark.sql.hive.client.ClientWrapper.&lt;init&gt;    (ClientWrapper.scala:171)
      at org.apache.spark.sql.hive.HiveContext.executionHive$lzycompute(HiveContext.scala    :163)
      at org.apache.spark.sql.hive.HiveContext.executionHive(HiveContext.scala:161)
      at org.apache.spark.sql.hive.HiveContext.&lt;init&gt;(HiveContext.scala:168)
      at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
      at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
      at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
      at java.lang.reflect.Constructor.newInstance(Unknown Source)
      at org.apache.spark.repl.SparkILoop.createSQLContext(SparkILoop.scala:1028)
      at $iwC$$iwC.&lt;init&gt;(&lt;console&gt;:9)
      at $iwC.&lt;init&gt;(&lt;console&gt;:18)
      at &lt;init&gt;(&lt;console&gt;:20)
      at .&lt;init&gt;(&lt;console&gt;:24)
      at .&lt;clinit&gt;(&lt;console&gt;)
      at .&lt;init&gt;(&lt;console&gt;:7)
      at .&lt;clinit&gt;(&lt;console&gt;)
      at $print(&lt;console&gt;)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
      at java.lang.reflect.Method.invoke(Unknown Source)
      at org.apache.spark.repl.SparkIMain$ReadEvalPrint.call(SparkIMain.scala:1065)
      at org.apache.spark.repl.SparkIMain$Request.loadAndRun(SparkIMain.scala:1340)
      at org.apache.spark.repl.SparkIMain.loadAndRunReq$1(SparkIMain.scala:840)
      at org.apache.spark.repl.SparkIMain.interpret(SparkIMain.scala:871)
      at org.apache.spark.repl.SparkIMain.interpret(SparkIMain.scala:819)
      at org.apache.spark.repl.SparkILoop.reallyInterpret$1(SparkILoop.scala:857)
      at org.apache.spark.repl.SparkILoop.interpretStartingWith(SparkILoop.scala:902)
      at org.apache.spark.repl.SparkILoop.command(SparkILoop.scala:814)
      at org.apache.spark.repl.SparkILoopInit$$anonfun$initializeSpark$1.apply(SparkILoopInit.scala:132)
      at org.apache.spark.repl.SparkILoopInit$$anonfun$initializeSpark$1.apply(SparkILoopInit.scala:124)
      at org.apache.spark.repl.SparkIMain.beQuietDuring(SparkIMain.scala:324)
      at org.apache.spark.repl.SparkILoopInit$class.initializeSpark(SparkILoopInit.scala:124)
      at org.apache.spark.repl.SparkILoop.initializeSpark(SparkILoop.scala:64)
      at org.apache.spark.repl.SparkILoop$$anonfun$org$apache$spark$repl$SparkILoop$$process$1$$anonfun$apply$mcZ$sp$5.apply$mcV$sp(SparkILoop.scala:974)
      at org.apache.spark.repl.SparkILoopInit$class.runThunks(SparkILoopInit.scala:159)
      at org.apache.spark.repl.SparkILoop.runThunks(SparkILoop.scala:64)
      at org.apache.spark.repl.SparkILoopInit$class.postInitialization(SparkILoopInit.sca      la:108)
      at org.apache.spark.repl.SparkILoop.postInitialization(SparkILoop.scala:64)
      at org.apache.spark.repl.SparkILoop$$anonfun$org$apache$spark$repl$SparkILoop$$proc      ess$1.apply$mcZ$sp(SparkILoop.scala:991)
      at org.apache.spark.repl.SparkILoop$$anonfun$org$apache$spark$repl$SparkILoop$$proc      ess$1.apply(SparkILoop.scala:945)
      at org.apache.spark.repl.SparkILoop$$anonfun$org$apache$spark$repl$SparkILoop$$proc      ess$1.apply(SparkILoop.scala:945)
      at scala.tools.nsc.util.ScalaClassLoader$.savingContextLoader(ScalaClassLoader.scal      a:135)
      at org.apache.spark.repl.SparkILoop.org$apache$spark$repl$SparkILoop$$process(SparkILoop.scala:945)
      at org.apache.spark.repl.SparkILoop.process(SparkILoop.scala:1059)
      at org.apache.spark.repl.Main$.main(Main.scala:31)
      at org.apache.spark.repl.Main.main(Main.scala)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
      at java.lang.reflect.Method.invoke(Unknown Source)
      at org.apache.spark.deploy.SparkSubmit$.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:672)
      at org.apache.spark.deploy.SparkSubmit$.doRunMain$1(SparkSubmit.scala:180)
      at org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:205)
      at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:120)
      at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
    Caused by: java.lang.NullPointerException
      at java.lang.ProcessBuilder.start(Unknown Source)
      at org.apache.hadoop.util.Shell.runCommand(Shell.java:445)
      at org.apache.hadoop.util.Shell.run(Shell.java:418)
      at org.apache.hadoop.util.Shell$ShellCommandExecutor.execute(Shell.java:650)
      at org.apache.hadoop.util.Shell.execCommand(Shell.java:739)
      at org.apache.hadoop.util.Shell.execCommand(Shell.java:722)
      at org.apache.hadoop.fs.FileUtil.execCommand(FileUtil.java:1097)
      at org.apache.hadoop.fs.RawLocalFileSystem$DeprecatedRawLocalFileStatus.loadPermissionInfo(RawLocalFileSystem.java:559)
      at org.apache.hadoop.fs.RawLocalFileSystem$DeprecatedRawLocalFileStatus.getPermission(RawLocalFileSystem.java:534)
     org.apache.hadoop.hive.ql.session.SessionState.createRootHDFSDir(SessionState.java:599)
      at org.apache.hadoop.hive.ql.session.SessionState.createSessionDirs(SessionState.java:554)
  </code></pre>
  
  <p>org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:508)
          ... 56 more</p>
  
  <pre><code>  &lt;console&gt;:10: error: not found: value sqlContext
                 import sqlContext.implicits._
                  ^
    &lt;console&gt;:10: error: not found: value sqlContext
                 import sqlContext.sql
                  ^
  </code></pre>