title: Cascading examples failed to compile?
body: <p>In shell I typed gradle <code>cleanJar</code> in the Impatient/part1 directory. The output is below. The error is "<strong>class file for org.apache.hadoop.mapred.JobConf not found</strong>". Why did it fail to compile?</p>
  
  <pre><code>:clean UP-TO-DATE
  :compileJava
  Download http://conjars.org/repo/cascading/cascading-core/2.0.1/cascading-core-2.0.1.pom
  Download http://conjars.org/repo/cascading/cascading-hadoop/2.0.1/cascading-hadoop-2.0.1.pom
  Download http://conjars.org/repo/riffle/riffle/0.1-dev/riffle-0.1-dev.pom
  Download http://repo1.maven.org/maven2/org/slf4j/slf4j-api/1.6.1/slf4j-api-1.6.1.pom
  Download http://repo1.maven.org/maven2/org/slf4j/slf4j-parent/1.6.1/slf4j-parent-1.6.1.pom
  Download http://repo1.maven.org/maven2/org/slf4j/slf4j-log4j12/1.6.1/slf4j-log4j12-1.6.1.pom
  Download http://conjars.org/repo/thirdparty/jgrapht-jdk1.6/0.8.1/jgrapht-jdk1.6-0.8.1.pom
  Download http://repo1.maven.org/maven2/org/codehaus/janino/janino/2.5.16/janino-2.5.16.pom
  Download http://conjars.org/repo/cascading/cascading-core/2.0.1/cascading-core-2.0.1.jar
  Download http://conjars.org/repo/cascading/cascading-hadoop/2.0.1/cascading-hadoop-2.0.1.jar
  Download http://conjars.org/repo/riffle/riffle/0.1-dev/riffle-0.1-dev.jar
  Download http://repo1.maven.org/maven2/org/slf4j/slf4j-api/1.6.1/slf4j-api-1.6.1.jar
  Download http://repo1.maven.org/maven2/org/slf4j/slf4j-log4j12/1.6.1/slf4j-log4j12-1.6.1.jar
  Download http://conjars.org/repo/thirdparty/jgrapht-jdk1.6/0.8.1/jgrapht-jdk1.6-0.8.1.jar
  Download http://repo1.maven.org/maven2/org/codehaus/janino/janino/2.5.16/janino-2.5.16.jar
  /home/is_admin/lab/cascading/Impatient/part1/src/main/java/impatient/Main.java:50: error: cannot access JobConf
      Tap inTap = new Hfs( new TextDelimited( true, "\t" ), inPath );
                  ^
    class file for org.apache.hadoop.mapred.JobConf not found
  1 error
  :compileJava FAILED
  
  FAILURE: Build failed with an exception.
  
  * What went wrong:
  Execution failed for task ':compileJava'.
  &gt; Compilation failed; see the compiler error output for details.
  
  * Try:
  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
  
  BUILD FAILED
  
  Total time: 22.599 secs
  </code></pre>