title: Apache Pig - Illustrate command error
body: <pre><code>]$ cat webccess.txt
  mark,yahoo.com,6
  sam,google.com,7
  john,yahoo.com,3
  patrick,cnn.com,8
  mary,facebook.com,1
  mark,yahoo.com,4
  john,bbc.com,10
  andrew,twitter.com,3
  patrick,twitter.com,9
  </code></pre>
  
  <p>I am running below task in Cloudera Quick Vm Hue-Pig Shell(Grunt)</p>
  
  <pre><code>grunt&gt; stage1 = LOAD '/user/cloudera/webaccess.txt' USING PigStorage(',') AS (name:chararray, website:chararray, access:int);
  grunt&gt; DUMP stage1;
  grunt&gt; stage2 = FILTER stage1 by access &gt;= 8;
  grunt&gt; stage3 = GROUP stage1 by name;
  grunt&gt; stage4 = FOREACH stage3 GENERATE group as GROUPS, MAX(stage1.access);
  grunt&gt; DUMP stage4;
  </code></pre>
  
  <p>OUTPUT:</p>
  
  <pre><code>(sam,7)
  (john,10)
  (mark,6)
  (mary,1)
  (andrew,3)
  (patrick,9)
  </code></pre>
  
  <p>Till this every thing is fine.</p>
  
  <p>When I apply ILLUSTRATE command to review on relation stage4, I am getting error as shown below,</p>
  
  <pre><code>grunt&gt; ILLUSTRATE stage4;
  
  2014-10-07 04:02:43,639 [main] WARN org.apache.hadoop.conf.Configuration - fs.default.name is deprecated. Instead, use fs.defaultFS
  2014-10-07 04:02:43,642 [main] INFO org.apache.pig.backend.hadoop.executionengine.HExecutionEngine - Connecting to hadoop file system at: hdfs://localhost.localdomain:8020
  2014-10-07 04:02:43,643 [main] WARN org.apache.hadoop.conf.Configuration - io.bytes.per.checksum is deprecated. Instead, use dfs.bytes-per-checksum
  2014-10-07 04:02:43,643 [main] WARN org.apache.hadoop.conf.Configuration - dfs.https.address is deprecated. Instead, use dfs.namenode.https-address
  2014-10-07 04:02:43,643 [main] INFO org.apache.pig.backend.hadoop.executionengine.HExecutionEngine - Connecting to map-reduce job tracker at: localhost.localdomain:8021
  2014-10-07 04:02:43,799 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MRCompiler - File concatenation threshold: 100 optimistic? false
  2014-10-07 04:02:43,800 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MultiQueryOptimizer - MR plan size before optimization: 1
  2014-10-07 04:02:43,800 [main] INFO org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MultiQueryOptimizer - MR plan size after optimization: 1
  2014-10-07 04:02:43,804 [main] INFO org.apache.pig.tools.pigstats.ScriptState - Pig script settings are added to the job
  2014-10-07 04:02:43,805 [main] ERROR org.apache.pig.pen.ExampleGenerator - Error reading data. Internal error creating job configuration.
  java.lang.RuntimeException: Internal error creating job configuration.
  at org.apache.pig.pen.ExampleGenerator.getExamples(ExampleGenerator.java:160)
  at org.apache.pig.PigServer.getExamples(PigServer.java:1182)
  at org.apache.pig.tools.grunt.GruntParser.processIllustrate(GruntParser.java:739)
  at org.apache.pig.tools.pigscript.parser.PigScriptParser.Illustrate(PigScriptParser.java:626)
  at org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:323)
  at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:194)
  at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:170)
  at org.apache.pig.tools.grunt.Grunt.run(Grunt.java:69)
  at org.apache.pig.Main.run(Main.java:538)
  at org.apache.pig.Main.main(Main.java:157)
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  at java.lang.reflect.Method.invoke(Method.java:597)
  at org.apache.hadoop.util.RunJar.main(RunJar.java:208)
  2014-10-07 04:02:43,868 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 2997: Encountered IOException. Exception
  Details at logfile: /dev/null
  </code></pre>
  
  <p>I am in learning stage, due to this error, I was not able to move to next topic. </p>
  
  <p>Also before starting this task the very first when I opened the Hue-Pig Shell(Grunt), I found the following warning.</p>
  
  <pre><code>Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/hadoop/util/PlatformName
  Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.util.PlatformName
  at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
  at java.security.AccessController.doPrivileged(Native Method)
  at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
  at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
  at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
  at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
  Could not find the main class: org.apache.hadoop.util.PlatformName. Program will exit.
  which: no hadoop in ((null))
  which: no /usr/lib/hadoop/bin/hadoop in ((null))
  dirname: missing operand
  Try `dirname --help' for more information.
  2014-10-07 03:18:27,802 [main] INFO org.apache.pig.Main - Apache Pig version 0.11.0-cdh4.7.0 (rexported) compiled May 28 2014, 11:05:48
  2014-10-07 03:18:27,803 [main] INFO org.apache.pig.Main - Logging error messages to: /dev/null
  2014-10-07 03:18:28,758 [main] INFO org.apache.pig.impl.util.Utils - Default bootup file /home/cloudera/.pigbootup not found
  2014-10-07 03:18:30,436 [main] WARN org.apache.hadoop.conf.Configuration - fs.default.name is deprecated. Instead, use fs.defaultFS
  2014-10-07 03:18:30,444 [main] INFO org.apache.pig.backend.hadoop.executionengine.HExecutionEngine - Connecting to hadoop file system at: hdfs://localhost.localdomain:8020
  2014-10-07 03:18:37,832 [main] INFO org.apache.pig.backend.hadoop.executionengine.HExecutionEngine - Connecting to map-reduce job tracker at: localhost.localdomain:8021
  2014-10-07 03:18:37,842 [main] WARN org.apache.hadoop.conf.Configuration - fs.default.name is deprecated. Instead, use fs.defaultFS
  </code></pre>