[YARN-1665] Set better defaults for HA configs for automatic failover

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.4.0
• Component/s: resourcemanager
• Hadoop Flags: Reviewed
• Assignee: Xuan Gong
• Reporter: Arpit Gupta
• Created: 28/Jan/14 23:00
• Updated: 10/Apr/14 13:11
• Resolved: 07/Feb/14 02:40

Description

In order to enable HA (automatic failover) i had to set the following configs

<property>
    <name>yarn.resourcemanager.ha.enabled</name>
    <value>true</value>
  </property>
  
  <property>
    <name>yarn.resourcemanager.ha.automatic-failover.enabled</name>
    <value>true</value>
  </property>

  <property>
    <name>yarn.resourcemanager.ha.automatic-failover.embedded</name>
    <value>true</value>
  </property>

I believe the user should just have to set yarn.resourcemanager.ha.enabled=true and the rest should be set as defaults. Basically automatic failover should be the default.