[MAPREDUCE-2158] Remove need for taskcontroller.cfg

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 0.22.0
• Component/s: task-controller
• Assignee: Aaron Myers
• Reporter: Aaron Myers
• Created: 27/Oct/10 00:10
• Updated: 27/Oct/10 00:10

Description

The taskcontroller.cfg configuration file seems unnecessary. It's parsed by the task-controller binary, and the path to it is baked into that binary at compile-time. It contains only 3 values, none of which are secret, all of which are also specified in either core-site.xml or mapred-site.xml. It seems like getting rid of taskcontroller.cfg will simplify configuration, and have no impact on the security of the system

I suggest we either:

1. Pass these values as arguments to task-controller when we execute it.
2. Use xerces to enable the task-controller to parse *-site.xml.

Of these two options, I think option 1 seems the cleanest/easiest. Either would be backward-compatible with existing configurations.