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From "Roman Shaposhnik (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CRUNCH-68) Crunch examples don't accept generic tool arguments
Date Wed, 19 Sep 2012 16:45:07 GMT
Roman Shaposhnik created CRUNCH-68:
--------------------------------------

             Summary: Crunch examples don't accept generic tool arguments
                 Key: CRUNCH-68
                 URL: https://issues.apache.org/jira/browse/CRUNCH-68
             Project: Crunch
          Issue Type: Bug
          Components: Core
    Affects Versions: 0.3.0
            Reporter: Roman Shaposhnik
            Assignee: Josh Wills
             Fix For: 0.4.0


Currently all crunch examples have the following code:

{noformat}
    if (args.length != 3) {
      System.err.println();
      System.err.println("Usage: " + this.getClass().getName() + " [generic options] input
output");
      System.err.println();
      GenericOptionsParser.printGenericCommandUsage(System.err);
      return 1;
    }
{noformat}

this is incorrect since run() gets to see all arguments even generic ones and thus you can't
predict the value of 
args.length.
This is also, unfortunately a major blocker, for using Crunch with Hadoop 2 because of a MAPREDUCE-4068.


Essentially at this point a combination of MAPREDUCE-4068 and inability to pass -libjars makes
Crunch example DOA for Hadoop 2 clusters.

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