// Associate the right host
ConfigGroup configGroup = cluster.getConfigGroups().get(groupId);
configGroup.setHosts(new HashMap<String, Host>() {{ put("h3",
clusters.getHost("h3")); }});
configGroup.persist();
requestId = startService(clusterName, serviceName2, false, false);
mapredInstall = null;
for (Stage stage : actionDB.getAllStages(requestId)) {
for (HostRoleCommand hrc : stage.getOrderedHostRoleCommands()) {