title: Apache Toree and Spark Scala Not Working in Jupyter
body: <p>I'm having problems running Scala Spark on Jupyter. Below is my error message when I load Apache Toree - Scala notebook in jupyter. </p>
  
  <pre><code>root@ubuntu-2gb-sgp1-01:~# jupyter notebook --ip 0.0.0.0 --port 8888
  [I 03:14:54.281 NotebookApp] Serving notebooks from local directory: /root
  [I 03:14:54.281 NotebookApp] 0 active kernels
  [I 03:14:54.281 NotebookApp] The Jupyter Notebook is running at: http://0.0.0.0:8888/
  [I 03:14:54.281 NotebookApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).
  [W 03:14:54.282 NotebookApp] No web browser found: could not locate runnable browser.
  [I 03:15:09.976 NotebookApp] 302 GET / (61.6.68.44) 1.21ms
  [I 03:15:15.924 NotebookApp] Creating new notebook in
  [W 03:15:16.592 NotebookApp] 404 GET /nbextensions/widgets/notebook/js/extension.js?v=20161120031454 (61.6.68.44) 15.49ms referer=http://188.166.235.21:8888/notebooks/Untitled2.ipynb?kernel_name=apache_toree_scala
  [I 03:15:16.677 NotebookApp] Kernel started: 94a63354-d294-4de7-a12c-2e05905e0c45
  Starting Spark Kernel with SPARK_HOME=/usr/local/spark
  16/11/20 03:15:18 [INFO] o.a.t.Main$$anon$1 - Kernel version: 0.1.0.dev8-incubating-SNAPSHOT
  16/11/20 03:15:18 [INFO] o.a.t.Main$$anon$1 - Scala version: Some(2.10.4)
  16/11/20 03:15:18 [INFO] o.a.t.Main$$anon$1 - ZeroMQ (JeroMQ) version: 3.2.2
  16/11/20 03:15:18 [INFO] o.a.t.Main$$anon$1 - Initializing internal actor system
  Exception in thread "main" java.lang.NoSuchMethodError: scala.collection.immutable.HashSet$.empty()Lscala/collection/immutable/HashSet;
          at akka.actor.ActorCell$.&lt;init&gt;(ActorCell.scala:336)
          at akka.actor.ActorCell$.&lt;clinit&gt;(ActorCell.scala)
          at akka.actor.RootActorPath.$div(ActorPath.scala:185)
          at akka.actor.LocalActorRefProvider.&lt;init&gt;(ActorRefProvider.scala:465)
          at akka.actor.LocalActorRefProvider.&lt;init&gt;(ActorRefProvider.scala:453)
          at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
          at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
          at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
          at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
          at akka.actor.ReflectiveDynamicAccess$$anonfun$createInstanceFor$2.apply(DynamicAccess.scala:78)
          at scala.util.Try$.apply(Try.scala:192)
          at akka.actor.ReflectiveDynamicAccess.createInstanceFor(DynamicAccess.scala:73)
          at akka.actor.ReflectiveDynamicAccess$$anonfun$createInstanceFor$3.apply(DynamicAccess.scala:84)
          at akka.actor.ReflectiveDynamicAccess$$anonfun$createInstanceFor$3.apply(DynamicAccess.scala:84)
          at scala.util.Success.flatMap(Try.scala:231)
          at akka.actor.ReflectiveDynamicAccess.createInstanceFor(DynamicAccess.scala:84)
          at akka.actor.ActorSystemImpl.liftedTree1$1(ActorSystem.scala:585)
          at akka.actor.ActorSystemImpl.&lt;init&gt;(ActorSystem.scala:578)
          at akka.actor.ActorSystem$.apply(ActorSystem.scala:142)
          at akka.actor.ActorSystem$.apply(ActorSystem.scala:109)
          at org.apache.toree.boot.layer.StandardBareInitialization$class.createActorSystem(BareInitialization.scala:71)
          at org.apache.toree.Main$$anon$1.createActorSystem(Main.scala:35)
          at org.apache.toree.boot.layer.StandardBareInitialization$class.initializeBare(BareInitialization.scala:60)
          at org.apache.toree.Main$$anon$1.initializeBare(Main.scala:35)
          at org.apache.toree.boot.KernelBootstrap.initialize(KernelBootstrap.scala:72)
          at org.apache.toree.Main$delayedInit$body.apply(Main.scala:40)
          at scala.Function0$class.apply$mcV$sp(Function0.scala:34)
          at scala.runtime.AbstractFunction0.apply$mcV$sp(AbstractFunction0.scala:12)
          at scala.App$$anonfun$main$1.apply(App.scala:76)
          at scala.App$$anonfun$main$1.apply(App.scala:76)
          at scala.collection.immutable.List.foreach(List.scala:381)
          at scala.collection.generic.TraversableForwarder$class.foreach(TraversableForwarder.scala:35)
          at scala.App$class.main(App.scala:76)
          at org.apache.toree.Main$.main(Main.scala:24)
          at org.apache.toree.Main.main(Main.scala)
          at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
          at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
          at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
          at java.lang.reflect.Method.invoke(Method.java:498)
          at org.apache.spark.deploy.SparkSubmit$.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:736)
          at org.apache.spark.deploy.SparkSubmit$.doRunMain$1(SparkSubmit.scala:185)
          at org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:210)
          at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:124)
          at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
  [W 03:15:26.738 NotebookApp] Timeout waiting for kernel_info reply from 94a63354-d294-4de7-a12c-2e05905e0c45
  </code></pre>
  
  <p>When running Scala shell, this is my output logs</p>
  
  <pre><code>root@ubuntu-2gb-sgp1-01:~# spark-shell
  Using Spark's default log4j profile: org/apache/spark/log4j-defaults.properties
  Setting default log level to "WARN".
  To adjust logging level use sc.setLogLevel(newLevel).
  16/11/20 03:17:11 WARN NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
  16/11/20 03:17:12 WARN Utils: Your hostname, ubuntu-2gb-sgp1-01 resolves to a loopback address: 127.0.1.1; using 10.15.0.5 instead (on interface eth0)
  16/11/20 03:17:12 WARN Utils: Set SPARK_LOCAL_IP if you need to bind to another address
  16/11/20 03:17:13 WARN SparkContext: Use an existing SparkContext, some configuration may not take effect.
  Spark context Web UI available at http://10.15.0.5:4040
  Spark context available as 'sc' (master = local[*], app id = local-1479611833426).
  Spark session available as 'spark'.
  Welcome to
        ____              __
       / __/__  ___ _____/ /__
      _\ \/ _ \/ _ `/ __/  '_/
     /___/ .__/\_,_/_/ /_/\_\   version 2.0.2
        /_/
  
  Using Scala version 2.11.8 (OpenJDK 64-Bit Server VM, Java 1.8.0_111)
  Type in expressions to have them evaluated.
  Type :help for more information.
  
  scala&gt;
  </code></pre>
  
  <p>This problem was highlighted before in jira <a href="https://issues.apache.org/jira/browse/TOREE-336" rel="noreferrer">https://issues.apache.org/jira/browse/TOREE-336</a> . However, I'm still unable to get it working for some reason. </p>
  
  <p>I followed the instructions listed on their official site. 
  <a href="https://toree.apache.org/documentation/user/quick-start" rel="noreferrer">https://toree.apache.org/documentation/user/quick-start</a> </p>
  
  <p>This is my path</p>
  
  <pre><code>scala&gt; root@ubuntu-2gb-sgp1-01:~# echo $PATH
  /root/bin:/root/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/usr/local/spark:/usr/local/spark/bin
  </code></pre>
  
  <p>Please note I didnt install Scala as it comes with spark. </p>
  
  <p>Thanks</p>