private int startMaster() {
Configuration conf = getConf();
try {
// If 'local', defer to LocalHBaseCluster instance. Starts master
// and regionserver both in the one JVM.
if (LocalHBaseCluster.isLocal(conf)) {
final MiniZooKeeperCluster zooKeeperCluster = new MiniZooKeeperCluster();
File zkDataPath = new File(conf.get(HConstants.ZOOKEEPER_DATA_DIR));
int zkClientPort = conf.getInt(HConstants.ZOOKEEPER_CLIENT_PORT, 0);
if (zkClientPort == 0) {
throw new IOException("No config value for " + HConstants.ZOOKEEPER_CLIENT_PORT);
}
zooKeeperCluster.setDefaultClientPort(zkClientPort);
// login the zookeeper server principal (if using security)
ZKUtil.loginServer(
conf,
"hbase.zookeeper.server.keytab.file",
"hbase.zookeeper.server.kerberos.principal",
null);
int clientPort = zooKeeperCluster.startup(zkDataPath);
if (clientPort != zkClientPort) {
String errorMsg =
"Could not start ZK at requested port of "
+ zkClientPort
+ ". ZK was started at port: "
+ clientPort
+ ". Aborting as clients (e.g. shell) will not be able to find "
+ "this ZK quorum.";
System.err.println(errorMsg);
throw new IOException(errorMsg);
}
conf.set(HConstants.ZOOKEEPER_CLIENT_PORT, Integer.toString(clientPort));
// Need to have the zk cluster shutdown when master is shutdown.
// Run a subclass that does the zk cluster shutdown on its way out.
LocalHBaseCluster cluster =
new LocalHBaseCluster(conf, 1, 1, LocalHMaster.class, HRegionServer.class);
((LocalHMaster) cluster.getMaster(0)).setZKCluster(zooKeeperCluster);
cluster.startup();
waitOnMasterThreads(cluster);
} else {
HMaster master = HMaster.constructMaster(masterClass, conf);
if (master.isStopped()) {
LOG.info("Won't bring the Master up as a shutdown is requested");
return -1;
}
master.start();
master.join();
if (master.isAborted()) throw new RuntimeException("HMaster Aborted");
}
} catch (Throwable t) {
LOG.error("Failed to start master", t);
return -1;
}
return 0;
}
