How to use

toNodeRole

method

in

org.apache.hadoop.hdfs.server.common.HdfsServerConstants$StartupOption

NameNode.initMetrics(conf, startOpt.toNodeRole());
FSNamesystem fsn = null;
try {

case BACKUP:
case CHECKPOINT:
 NamenodeRole role = startOpt.toNodeRole();
 DefaultMetricsSystem.initialize(role.toString().replace(" ", ""));
 return new BackupNode(conf, role);

NameNode.initMetrics(conf, startOpt.toNodeRole());
FSNamesystem fsn = null;
try {

NamenodeRole role = startOpt.toNodeRole();
DefaultMetricsSystem.initialize(role.toString().replace(" ", ""));
return new BackupNode(conf, role);

NamenodeRole role = startOpt.toNodeRole();
DefaultMetricsSystem.initialize(role.toString().replace(" ", ""));
return new BackupNode(conf, role);

NameNode.initMetrics(conf, startOpt.toNodeRole());
FSNamesystem fsn = null;
try {