a34358f0_e_Hadoop_2_7_1___YARN_Commands__Description
[COMMAND_OPTIONS] -failover [–forceactive] [Description] 
Initiate a failover from serviceId1 to serviceId2. Try to failover to the target service even if it is not ready if the –forceactive option is used. This command can not be used if automatic failover is enabled.
Apache Hadoop 2.7.1 – YARN Commands