*/
private int refreshUserToGroupsMappings() throws IOException {
// Get the current configuration
Configuration conf = getConf();
// Create the client
RefreshUserToGroupMappingsProtocol refreshProtocol =
(RefreshUserToGroupMappingsProtocol)
RPC.getProxy(RefreshUserToGroupMappingsProtocol.class,
RefreshUserToGroupMappingsProtocol.versionID,
JobTracker.getAddress(conf), getUGI(conf), conf,
NetUtils.getSocketFactory(conf,
RefreshUserToGroupMappingsProtocol.class));
// Refresh the user-to-groups mappings
refreshProtocol.refreshUserToGroupsMappings(conf);
return 0;
}