Scala MapReduce Framework giving Type Mismatch

I have a MapReduce framework in Scala that is based on several o fthe org.apache.hadoop libraries. It works great with a simple wordcount program. However, I want to apply it to something useful and am hitting a roadblock. I want to take a csv file (or any delimiter really) and pass whatever is in the 1st column as the key and subsequently count the incidence of keys.

The mapper code looks like this

class WordCountMapper extends Mapper[LongWritable, Text, Text, LongWritable] with HImplicits {
  protected override def map(lnNumber: LongWritable, line: Text, context: Mapper[LongWritable, Text, Text, LongWritable]#Context): Unit = {
  line.split(",", -1)(0) foreach (context.write(_,1))  //Splits data
  }
}

The problem comes in the 'line.split' code. When I try to compile it, I get an error that says:

found: char required:org.apache.hadoop.io.Text.

line.split... should return a string that is being passed to the _ in the write(_,1), but for soem reason itis thinking it is a char. I've even added .toString to explicitly make it a string but that didn't work either.

Any ideas are appreciated. Let me know what additional details I can provide.

Update:

Here is the list of imports:

import org.apache.hadoop.io.{LongWritable, Text}
import org.apache.hadoop.mapreduce.{Reducer, Job, Mapper}
import org.apache.hadoop.conf.{Configured}
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat
import scala.collection.JavaConversions._
import org.apache.hadoop.util.{ToolRunner, Tool}

Here is the build.sbt code:

import AssemblyKeys._ // put this at the top of the file

assemblySettings

organization := "scala"

name := "WordCount"

version := "1.0"

scalaVersion:= "2.11.2"

scalacOptions ++= Seq("-no-specialization", "-deprecation")

libraryDependencies ++= Seq("org.apache.hadoop" % "hadoop-client" % "1.2.1",
                        "org.apache.hadoop" % "hadoop-core" % "latest.integration" exclude ("hadoop-core", "org/apache/hadoop/hdfs/protocol/ClientDatanodeProtocol.class") ,
                        "org.apache.hadoop" % "hadoop-common" % "2.5.1",
                        "org.apache.hadoop" % "hadoop-mapreduce-client-core" % "2.5.1",
                        "commons-configuration" % "commons-configuration" % "1.9",
                        "org.apache.hadoop" % "hadoop-hdfs" % "latest.integration")


 jarName in assembly := "WordCount.jar"

 mergeStrategy in assembly <<= (mergeStrategy in assembly) { (old) =>
  {case s if s.endsWith(".class") => MergeStrategy.last
case s if s.endsWith(".xsd") => MergeStrategy.last
case s if s.endsWith(".dtd") => MergeStrategy.last
case s if s.endsWith(".xml") => MergeStrategy.last
case s if s.endsWith(".properties") => MergeStrategy.last
case x => old(x)
  }
}