[PIG-3497] JobControlCompiler should only do reducer estimation when the job has a reduce phase

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.12.0
• Assignee: Akihiro Matsukawa
• Reporter: Akihiro Matsukawa
• Created: 03/Oct/13 22:04
• Updated: 14/Oct/13 16:46
• Resolved: 04/Oct/13 22:44

Description

Currently, JobControlCompiler makes an estimation for the number of reducers required (by default based on input size into mappers) regardless of whether there is a reduce phase in the job. This is unnecessary, especially when running more complex custom reducer estimators.

Change to only estimate reducers when necessary.