[YARN-3823] Fix mismatch in default values for yarn.scheduler.maximum-allocation-vcores property

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.7.0
• Fix Version/s: 2.8.0, 3.0.0-alpha1
• Labels: supportability
• Hadoop Flags: Reviewed
• Release Note: Default value for 'yarn.scheduler.maximum-allocation-vcores' changed from 32 to 4.
• Assignee: Ray Chiang
• Reporter: Ray Chiang
• Created: 18/Jun/15 05:02
• Updated: 30/Aug/16 01:20
• Resolved: 01/Jul/15 05:45

Description

In yarn-default.xml, the property is defined as:

XML Property: yarn.scheduler.maximum-allocation-vcores
XML Value: 32

In YarnConfiguration.java the corresponding member variable is defined as:

Config Name: DEFAULT_RM_SCHEDULER_MAXIMUM_ALLOCATION_VCORES
Config Value: 4

The Config value comes from YARN-193 and the default xml property comes from YARN-2. Should we keep it this way or should one of the values get updated?