/// <summary>Shut down this instance of the datanode.</summary>
/// <remarks>
/// Shut down this instance of the datanode.
/// Returns only after shutdown is complete.
/// </remarks>
public virtual void Shutdown()
{
shouldRun = false;
if (checkpointThread != null)
{
checkpointThread.Interrupt();
try
{
checkpointThread.Join(10000);
}
catch (Exception)
{
Log.Info("Interrupted waiting to join on checkpointer thread");
Sharpen.Thread.CurrentThread().Interrupt();
}
}
// maintain status
try
{
if (infoServer != null)
{
infoServer.Stop();
infoServer = null;
}
}
catch (Exception e)
{
Log.Warn("Exception shutting down SecondaryNameNode", e);
}
if (nameNodeStatusBeanName != null)
{
MBeans.Unregister(nameNodeStatusBeanName);
nameNodeStatusBeanName = null;
}
try
{
if (checkpointImage != null)
{
checkpointImage.Close();
checkpointImage = null;
}
}
catch (IOException e)
{
Log.Warn("Exception while closing CheckpointStorage", e);
}
if (namesystem != null)
{
namesystem.Shutdown();
namesystem = null;
}
}
/// <summary>Initialize SecondaryNameNode.</summary>
/// <exception cref="System.IO.IOException"/>
private void Initialize(Configuration conf, SecondaryNameNode.CommandLineOpts commandLineOpts
)
{
IPEndPoint infoSocAddr = GetHttpAddress(conf);
string infoBindAddress = infoSocAddr.GetHostName();
UserGroupInformation.SetConfiguration(conf);
if (UserGroupInformation.IsSecurityEnabled())
{
SecurityUtil.Login(conf, DFSConfigKeys.DfsSecondaryNamenodeKeytabFileKey, DFSConfigKeys
.DfsSecondaryNamenodeKerberosPrincipalKey, infoBindAddress);
}
// initiate Java VM metrics
DefaultMetricsSystem.Initialize("SecondaryNameNode");
JvmMetrics.Create("SecondaryNameNode", conf.Get(DFSConfigKeys.DfsMetricsSessionIdKey
), DefaultMetricsSystem.Instance());
// Create connection to the namenode.
shouldRun = true;
nameNodeAddr = NameNode.GetServiceAddress(conf, true);
this.conf = conf;
this.namenode = NameNodeProxies.CreateNonHAProxy <NamenodeProtocol>(conf, nameNodeAddr
, UserGroupInformation.GetCurrentUser(), true).GetProxy();
// initialize checkpoint directories
fsName = GetInfoServer();
checkpointDirs = FSImage.GetCheckpointDirs(conf, "/tmp/hadoop/dfs/namesecondary");
checkpointEditsDirs = FSImage.GetCheckpointEditsDirs(conf, "/tmp/hadoop/dfs/namesecondary"
);
checkpointImage = new SecondaryNameNode.CheckpointStorage(conf, checkpointDirs, checkpointEditsDirs
);
checkpointImage.RecoverCreate(commandLineOpts.ShouldFormat());
checkpointImage.DeleteTempEdits();
namesystem = new FSNamesystem(conf, checkpointImage, true);
// Disable quota checks
namesystem.dir.DisableQuotaChecks();
// Initialize other scheduling parameters from the configuration
checkpointConf = new CheckpointConf(conf);
IPEndPoint httpAddr = infoSocAddr;
string httpsAddrString = conf.GetTrimmed(DFSConfigKeys.DfsNamenodeSecondaryHttpsAddressKey
, DFSConfigKeys.DfsNamenodeSecondaryHttpsAddressDefault);
IPEndPoint httpsAddr = NetUtils.CreateSocketAddr(httpsAddrString);
HttpServer2.Builder builder = DFSUtil.HttpServerTemplateForNNAndJN(conf, httpAddr
, httpsAddr, "secondary", DFSConfigKeys.DfsSecondaryNamenodeKerberosInternalSpnegoPrincipalKey
, DFSConfigKeys.DfsSecondaryNamenodeKeytabFileKey);
nameNodeStatusBeanName = MBeans.Register("SecondaryNameNode", "SecondaryNameNodeInfo"
, this);
infoServer = builder.Build();
infoServer.SetAttribute("secondary.name.node", this);
infoServer.SetAttribute("name.system.image", checkpointImage);
infoServer.SetAttribute(JspHelper.CurrentConf, conf);
infoServer.AddInternalServlet("imagetransfer", ImageServlet.PathSpec, typeof(ImageServlet
), true);
infoServer.Start();
Log.Info("Web server init done");
HttpConfig.Policy policy = DFSUtil.GetHttpPolicy(conf);
int connIdx = 0;
if (policy.IsHttpEnabled())
{
IPEndPoint httpAddress = infoServer.GetConnectorAddress(connIdx++);
conf.Set(DFSConfigKeys.DfsNamenodeSecondaryHttpAddressKey, NetUtils.GetHostPortString
(httpAddress));
}
if (policy.IsHttpsEnabled())
{
IPEndPoint httpsAddress = infoServer.GetConnectorAddress(connIdx);
conf.Set(DFSConfigKeys.DfsNamenodeSecondaryHttpsAddressKey, NetUtils.GetHostPortString
(httpsAddress));
}
legacyOivImageDir = conf.Get(DFSConfigKeys.DfsNamenodeLegacyOivImageDirKey);
Log.Info("Checkpoint Period :" + checkpointConf.GetPeriod() + " secs " + "(" +
checkpointConf.GetPeriod() / 60 + " min)");
Log.Info("Log Size Trigger :" + checkpointConf.GetTxnCount() + " txns");
}
internal virtual void SetFSImage(SecondaryNameNode.CheckpointStorage image)
{
this.checkpointImage = image;
}
