/** Wait for service to finish. (Normally, it runs forever.) */
public void join() {
try {
rpcServer.join();
} catch (InterruptedException ie) {
LOG.info("Caught interrupted exception ", ie);
}
}
NamenodeRegistration setRegistration() throws IOException {
nodeRegistration =
new NamenodeRegistration(
NetUtils.getHostPortString(rpcServer.getRpcAddress()),
NetUtils.getHostPortString(getHttpAddress()),
StorageInfo.getStorageInfoFromDB(),
getRole()); // HOP change. previous code was getFSImage().getStorage()
return nodeRegistration;
}
/** Start the services common to active and standby states */
private void startCommonServices(Configuration conf) throws IOException {
startHttpServer(conf);
startLeaderElectionService();
namesystem.startCommonServices(conf);
rpcServer.start();
plugins = conf.getInstances(DFS_NAMENODE_PLUGINS_KEY, ServicePlugin.class);
for (ServicePlugin p : plugins) {
try {
p.start(this);
} catch (Throwable t) {
LOG.warn("ServicePlugin " + p + " could not be started", t);
}
}
LOG.info(getRole() + " RPC up at: " + rpcServer.getRpcAddress());
if (rpcServer.getServiceRpcAddress() != null) {
LOG.info(getRole() + " service RPC up at: " + rpcServer.getServiceRpcAddress());
}
}
private void startLeaderElectionService() throws IOException {
// Initialize the leader election algorithm (only once rpc server is
// created and httpserver is started)
long leadercheckInterval =
conf.getInt(
DFSConfigKeys.DFS_LEADER_CHECK_INTERVAL_IN_MS_KEY,
DFSConfigKeys.DFS_LEADER_CHECK_INTERVAL_IN_MS_DEFAULT);
int missedHeartBeatThreshold =
conf.getInt(
DFSConfigKeys.DFS_LEADER_MISSED_HB_THRESHOLD_KEY,
DFSConfigKeys.DFS_LEADER_MISSED_HB_THRESHOLD_DEFAULT);
int leIncrement =
conf.getInt(
DFSConfigKeys.DFS_LEADER_TP_INCREMENT_KEY,
DFSConfigKeys.DFS_LEADER_TP_INCREMENT_DEFAULT);
leaderElection =
new LeaderElection(
new HdfsLeDescriptorFactory(),
leadercheckInterval,
missedHeartBeatThreshold,
leIncrement,
httpServer.getHttpAddress().getAddress().getHostAddress()
+ ":"
+ httpServer.getHttpAddress().getPort(),
rpcServer.getRpcAddress().getAddress().getHostAddress()
+ ":"
+ rpcServer.getRpcAddress().getPort());
leaderElection.start();
try {
leaderElection.waitActive();
} catch (InterruptedException e) {
LOG.warn("NN was interrupted");
}
}
private void stopCommonServices() {
if (namesystem != null) {
namesystem.close();
}
if (rpcServer != null) {
rpcServer.stop();
}
if (leaderElection != null && leaderElection.isRunning()) {
leaderElection.stopElectionThread();
}
if (plugins != null) {
for (ServicePlugin p : plugins) {
try {
p.stop();
} catch (Throwable t) {
LOG.warn("ServicePlugin " + p + " could not be stopped", t);
}
}
}
stopHttpServer();
}
/** @return NameNode service RPC address if configured, the NameNode RPC address otherwise */
public InetSocketAddress getServiceRpcAddress() {
final InetSocketAddress serviceAddr = rpcServer.getServiceRpcAddress();
return serviceAddr == null ? rpcServer.getRpcAddress() : serviceAddr;
}
/** @return NameNode RPC address in "host:port" string form */
public String getNameNodeAddressHostPortString() {
return NetUtils.getHostPortString(rpcServer.getRpcAddress());
}
/** @return NameNode RPC address */
public InetSocketAddress getNameNodeAddress() {
return rpcServer.getRpcAddress();
}