title: Running Apache.Spark - log4j:WARN Please initialize the log4j system properly
body: <p>I got a problem with loading Spark Framework, having this kind of log.There is some problem with log4j and I dont know what is going on.Could u give me some advice how to solve the problem and run it properly?</p>
  
  <pre><code>C:\dev\spark-1.6.0-bin-hadoop2.6\bin&gt;spark-shell
  log4j:WARN No appenders could be found for logger (org.apache.hadoop.metrics2.li
  b.MutableMetricsFactory).
  log4j:WARN Please initialize the log4j system properly.
  log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more in
  fo.
  Using Spark's repl log4j profile: org/apache/spark/log4j-defaults-repl.propertie
  s
  To adjust logging level use sc.setLogLevel("INFO")
  Welcome to
        ____              __
       / __/__  ___ _____/ /__
      _\ \/ _ \/ _ `/ __/  '_/
     /___/ .__/\_,_/_/ /_/\_\   version 1.6.0
        /_/
  
  Using Scala version 2.10.5 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_73)
  Type in expressions to have them evaluated.
  Type :help for more information.
  Spark context available as sc.
  16/02/25 22:20:12 WARN General: Plugin (Bundle) "org.datanucleus" is already reg
  istered. Ensure you dont have multiple JAR versions of the same plugin in the cl
  asspath. The URL "file:/C:/dev/spark-1.6.0-bin-hadoop2.6/bin/../lib/datanucleus-
  core-3.2.10.jar" is already registered, and you are trying to register an identi
  cal plugin located at URL "file:/C:/dev/spark-1.6.0-bin-hadoop2.6/lib/datanucleu
  s-core-3.2.10.jar."
  16/02/25 22:20:12 WARN General: Plugin (Bundle) "org.datanucleus.store.rdbms" is
   already registered. Ensure you dont have multiple JAR versions of the same plug
  in in the classpath. The URL "file:/C:/dev/spark-1.6.0-bin-hadoop2.6/lib/datanuc
  leus-rdbms-3.2.9.jar" is already registered, and you are trying to register an i
  dentical plugin located at URL "file:/C:/dev/spark-1.6.0-bin-hadoop2.6/bin/../li
  b/datanucleus-rdbms-3.2.9.jar."
  16/02/25 22:20:12 WARN General: Plugin (Bundle) "org.datanucleus.api.jdo" is alr
  eady registered. Ensure you dont have multiple JAR versions of the same plugin i
  n the classpath. The URL "file:/C:/dev/spark-1.6.0-bin-hadoop2.6/lib/datanucleus
  -api-jdo-3.2.6.jar" is already registered, and you are trying to register an ide
  ntical plugin located at URL "file:/C:/dev/spark-1.6.0-bin-hadoop2.6/bin/../lib/
  datanucleus-api-jdo-3.2.6.jar."
  16/02/25 22:20:13 WARN Connection: BoneCP specified but not present in CLASSPATH
   (or one of dependencies)
  16/02/25 22:20:13 WARN Connection: BoneCP specified but not present in CLASSPATH
   (or one of dependencies)
  16/02/25 22:20:21 WARN ObjectStore: Version information not found in metastore.
  hive.metastore.schema.verification is not enabled so recording the schema versio
  n 1.2.0
  16/02/25 22:20:21 WARN ObjectStore: Failed to get database default, returning No
  SuchObjectException
  16/02/25 22:20:22 WARN : Your hostname, iMEiL resolves to a loopback/non-reachab
  le address: fe80:0:0:0:19ea:ffe2:e70c:3da7%wlan1, but we couldn't find any exter
  nal IP address!
  java.lang.RuntimeException: java.lang.NullPointerException
          at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.jav
  a:522)
          at org.apache.spark.sql.hive.client.ClientWrapper.&lt;init&gt;(ClientWrapper.s
  cala:194)
          at org.apache.spark.sql.hive.client.IsolatedClientLoader.createClient(Is
  olatedClientLoader.scala:238)
          at org.apache.spark.sql.hive.HiveContext.executionHive$lzycompute(HiveCo
  ntext.scala:218)
          at org.apache.spark.sql.hive.HiveContext.executionHive(HiveContext.scala
  :208)
          at org.apache.spark.sql.hive.HiveContext.functionRegistry$lzycompute(Hiv
  eContext.scala:462)
          at org.apache.spark.sql.hive.HiveContext.functionRegistry(HiveContext.sc
  ala:461)
          at org.apache.spark.sql.UDFRegistration.&lt;init&gt;(UDFRegistration.scala:40)
  
          at org.apache.spark.sql.SQLContext.&lt;init&gt;(SQLContext.scala:330)
          at org.apache.spark.sql.hive.HiveContext.&lt;init&gt;(HiveContext.scala:90)
          at org.apache.spark.sql.hive.HiveContext.&lt;init&gt;(HiveContext.scala:101)
          at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
  
          at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
  
          at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Sou
  rce)
          at java.lang.reflect.Constructor.newInstance(Unknown Source)
          at org.apache.spark.repl.SparkILoop.createSQLContext(SparkILoop.scala:10
  28)
          at $iwC$$iwC.&lt;init&gt;(&lt;console&gt;:15)
          at $iwC.&lt;init&gt;(&lt;console&gt;:24)
          at &lt;init&gt;(&lt;console&gt;:26)
          at .&lt;init&gt;(&lt;console&gt;:30)
          at .&lt;clinit&gt;(&lt;console&gt;)
          at .&lt;init&gt;(&lt;console&gt;:7)
          at .&lt;clinit&gt;(&lt;console&gt;)
          at $print(&lt;console&gt;)
          at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
          at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
          at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
          at java.lang.reflect.Method.invoke(Unknown Source)
          at org.apache.spark.repl.SparkIMain$ReadEvalPrint.call(SparkIMain.scala:
  1065)
          at org.apache.spark.repl.SparkIMain$Request.loadAndRun(SparkIMain.scala:
  1346)
          at org.apache.spark.repl.SparkIMain.loadAndRunReq$1(SparkIMain.scala:840
  )
          at org.apache.spark.repl.SparkIMain.interpret(SparkIMain.scala:871)
          at org.apache.spark.repl.SparkIMain.interpret(SparkIMain.scala:819)
          at org.apache.spark.repl.SparkILoop.reallyInterpret$1(SparkILoop.scala:8
  57)
          at org.apache.spark.repl.SparkILoop.interpretStartingWith(SparkILoop.sca
  la:902)
          at org.apache.spark.repl.SparkILoop.command(SparkILoop.scala:814)
          at org.apache.spark.repl.SparkILoopInit$$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(SparkILoop
  Init.scala:124)
          at org.apache.spark.repl.SparkILoop.initializeSpark(SparkILoop.scala:64)
  
          at org.apache.spark.repl.SparkILoop$$anonfun$org$apache$spark$repl$Spark
  ILoop$$process$1$$anonfun$apply$mcZ$sp$5.apply$mcV$sp(SparkILoop.scala:974)
          at org.apache.spark.repl.SparkILoopInit$class.runThunks(SparkILoopInit.s
  cala:159)
          at org.apache.spark.repl.SparkILoop.runThunks(SparkILoop.scala:64)
          at org.apache.spark.repl.SparkILoopInit$class.postInitialization(SparkIL
  oopInit.scala:108)
          at org.apache.spark.repl.SparkILoop.postInitialization(SparkILoop.scala:
  64)
          at org.apache.spark.repl.SparkILoop$$anonfun$org$apache$spark$repl$Spark
  ILoop$$process$1.apply$mcZ$sp(SparkILoop.scala:991)
          at org.apache.spark.repl.SparkILoop$$anonfun$org$apache$spark$repl$Spark
  ILoop$$process$1.apply(SparkILoop.scala:945)
          at org.apache.spark.repl.SparkILoop$$anonfun$org$apache$spark$repl$Spark
  ILoop$$process$1.apply(SparkILoop.scala:945)
          at scala.tools.nsc.util.ScalaClassLoader$.savingContextLoader(ScalaClass
  Loader.scala:135)
          at org.apache.spark.repl.SparkILoop.org$apache$spark$repl$SparkILoop$$pr
  ocess(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$deploy$SparkSub
  mit$$runMain(SparkSubmit.scala:731)
          at org.apache.spark.deploy.SparkSubmit$.doRunMain$1(SparkSubmit.scala:18
  1)
          at org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:206)
          at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:121)
          at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
  Caused by: java.lang.NullPointerException
          at java.lang.ProcessBuilder.start(Unknown Source)
          at org.apache.hadoop.util.Shell.runCommand(Shell.java:482)
          at org.apache.hadoop.util.Shell.run(Shell.java:455)
          at org.apache.hadoop.util.Shell$ShellCommandExecutor.execute(Shell.java:
  715)
          at org.apache.hadoop.util.Shell.execCommand(Shell.java:808)
          at org.apache.hadoop.util.Shell.execCommand(Shell.java:791)
          at org.apache.hadoop.fs.FileUtil.execCommand(FileUtil.java:1097)
          at org.apache.hadoop.fs.RawLocalFileSystem$DeprecatedRawLocalFileStatus.
  loadPermissionInfo(RawLocalFileSystem.java:582)
          at org.apache.hadoop.fs.RawLocalFileSystem$DeprecatedRawLocalFileStatus.
  getPermission(RawLocalFileSystem.java:557)
          at org.apache.hadoop.hive.ql.session.SessionState.createRootHDFSDir(Sess
  ionState.java:599)
          at org.apache.hadoop.hive.ql.session.SessionState.createSessionDirs(Sess
  ionState.java:554)
          at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.jav
  a:508)
          ... 62 more
  
  &lt;console&gt;:16: error: not found: value sqlContext
           import sqlContext.implicits._
                  ^
  &lt;console&gt;:16: error: not found: value sqlContext
           import sqlContext.sql
                  ^
  </code></pre>