[HADOOP-1971] Constructing a JobConf without a class leads to a very misleading error message.

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.14.2
• Fix Version/s: 0.15.0

Environment

Centos, java 1.5

• Assignee: Enis Soztutar
• Reporter: Ted Dunning
• Created: 30/Sep/07 02:50
• Updated: 08/Jul/09 16:51
• Resolved: 05/Oct/07 22:18

Description

If this line from a typical map/reduce program

JobConf conf = new JobConf(Flatten.class);

has the argument deleted then I get a message that the input format that I specify cannot be found. That message leads a naive user on a rat chase. I only corrected this by bisecting against a working program.