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via Google Groups by Dan, 1 year ago
Not enough usable hosts in the cluster to launch 2 worker containers. Only 1 hosts available
java.lang.RuntimeException: Not enough usable hosts in the cluster to 
 launch 2 worker containers. Only 1 hosts available	at alluxio.yarn.ContainerAllocator.requestContainers(ContainerAllocator.java:158)	at alluxio.yarn.ContainerAllocator.allocateContainers(ContainerAllocator.java:110)	at alluxio.yarn.ApplicationMaster.requestAndLaunchContainers(ApplicationMaster.java:341)	at alluxio.yarn.ApplicationMaster.runApplicationMaster(ApplicationMaster.java:233)	at alluxio.yarn.ApplicationMaster.main(ApplicationMaster.java:211)