[YARN-8932] ResourceUtilization cpu is misused in oversubscription as a percentage

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: YARN-1011
• Fix Version/s: YARN-1011
• Hadoop Flags: Reviewed
• Assignee: Haibo Chen
• Reporter: Haibo Chen
• Created: 22/Oct/18 20:49
• Updated: 02/Nov/18 20:39
• Resolved: 02/Nov/18 20:39

Description

The ResourceUtilization javadoc mistakenly documents the cpu as a percentage represented by a float number in [0, 1.0f], however it is used as the # of vcores used in reality.

See javadoc and discussion in YARN-8911.
  /**
   * Get <em>CPU</em> utilization.
   *
   * @return <em>CPU utilization</em> normalized to 1 CPU
   */
  @Public
  @Unstable
  public abstract float getCPU();

Issue Links

• is related to: YARN-8911 ContainerScheduler incorrectly uses percentage number as the cpu resource utlization