[MAPREDUCE-3965] JobConf.findContainingJar NPEs if it can't find the classloader of a class

• Type: Bug
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 0.23.0, 1.0.0, 2.0.0-alpha

Environment

Setting up a job under Groovy, OSX10.7, job started by ant's <java> with fork==true

• Assignee: Unassigned
• Reporter: Steve Loughran
• Created: 03/Mar/12 14:07
• Updated: 10/Mar/15 04:32

Description

I never knew that classes may not have classloaders, but it turns out they can -in which case Object.getClass().getClassLoader() will be null "This method will return null in such implementations if this class was loaded by the bootstrap class loader.""

When this (rare) situation arises, JobConf.findContainingJar() NPEs, when failing with a slightly more useful error message would be preferred.