Error Running SparkPi.scala Example

[Krishna Kalyan]

Hello,
I am faced with problems when I try to run SparkPi.scala.
I took the following steps below:
a) git pull https://github.com/apache/spark
b) Import the project in Intellij as a maven project
c) Run 'SparkPi'

Error Below:
Information:16/06/16 01:34 - Compilation completed with 10 errors and 5
warnings in 5s 843ms
Warning:scalac: Class org.jboss.netty.channel.ChannelFactory not found -
continuing with a stub.
Warning:scalac: Class org.jboss.netty.channel.ChannelPipelineFactory not
found - continuing with a stub.
Warning:scalac: Class org.jboss.netty.handler.execution.ExecutionHandler
not found - continuing with a stub.
Warning:scalac: Class org.jboss.netty.channel.group.ChannelGroup not found
- continuing with a stub.
Warning:scalac: Class com.google.common.collect.ImmutableMap not found -
continuing with a stub.
/Users/krishna/Experiment/spark/external/flume-sink/src/main/scala/org/apache/spark/streaming/flume/sink/SparkAvroCallbackHandler.scala
Error:(45, 66) not found: type SparkFlumeProtocol
  val transactionTimeout: Int, val backOffInterval: Int) extends
SparkFlumeProtocol with Logging {
                                                                 ^
Error:(70, 39) not found: type EventBatch
  override def getEventBatch(n: Int): EventBatch = {
                                      ^
Error:(85, 13) not found: type EventBatch
        new EventBatch("Spark sink has been stopped!", "",
java.util.Collections.emptyList())
            ^
/Users/krishna/Experiment/spark/external/flume-sink/src/main/scala/org/apache/spark/streaming/flume/sink/TransactionProcessor.scala
Error:(80, 22) not found: type EventBatch
  def getEventBatch: EventBatch = {
                     ^
Error:(48, 37) not found: type EventBatch
  @volatile private var eventBatch: EventBatch = new EventBatch("Unknown
Error", "",
                                    ^
Error:(48, 54) not found: type EventBatch
  @volatile private var eventBatch: EventBatch = new EventBatch("Unknown
Error", "",
                                                     ^
Error:(115, 41) not found: type SparkSinkEvent
        val events = new util.ArrayList[SparkSinkEvent](maxBatchSize)
                                        ^
Error:(146, 28) not found: type EventBatch
          eventBatch = new EventBatch("", seqNum, events)
                           ^
/Users/krishna/Experiment/spark/external/flume-sink/src/main/scala/org/apache/spark/streaming/flume/sink/SparkSinkUtils.scala
Error:(25, 27) not found: type EventBatch
  def isErrorBatch(batch: EventBatch): Boolean = {
                          ^
/Users/krishna/Experiment/spark/external/flume-sink/src/main/scala/org/apache/spark/streaming/flume/sink/SparkSink.scala
Error:(86, 51) not found: type SparkFlumeProtocol
    val responder = new SpecificResponder(classOf[SparkFlumeProtocol],
handler.get)

Thanks,
Krishan