[PIG-2070] "Unknown" appears in error message for an error case

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.9.0
• Fix Version/s: 0.9.0
• Assignee: Thejas Nair
• Reporter: Xuefu Zhang
• Created: 13/May/11 18:04
• Updated: 04/Aug/11 00:35
• Resolved: 16/May/11 18:57

Description

For the following query:

a = load '1.txt' as (a0:int, a1:int);
b = load '2.txt' as (a0:int, a1:chararray);
c = cogroup a by (a0,a1), b by (a0,a1);

Pig gives the following message, which includes "unknown" word.

2011-05-13 11:01:18,682 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 1051:
<line 3, column 4> Cannot cast to Unknown

The error message should be more meaningful.