/// <summary>Register this backup node with the active name-node.</summary>
/// <param name="nsInfo">namespace information</param>
/// <exception cref="System.IO.IOException"/>
private void RegisterWith(NamespaceInfo nsInfo)
{
BackupImage bnImage = (BackupImage)GetFSImage();
NNStorage storage = bnImage.GetStorage();
// verify namespaceID
if (storage.GetNamespaceID() == 0)
{
// new backup storage
storage.SetStorageInfo(nsInfo);
storage.SetBlockPoolID(nsInfo.GetBlockPoolID());
storage.SetClusterID(nsInfo.GetClusterID());
}
else
{
nsInfo.ValidateStorage(storage);
}
bnImage.InitEditLog(HdfsServerConstants.StartupOption.Regular);
SetRegistration();
NamenodeRegistration nnReg = null;
while (!IsStopRequested())
{
try
{
nnReg = namenode.RegisterSubordinateNamenode(GetRegistration());
break;
}
catch (SocketTimeoutException e)
{
// name-node is busy
Log.Info("Problem connecting to name-node: " + nnRpcAddress);
try
{
Sharpen.Thread.Sleep(1000);
}
catch (Exception)
{
Log.Warn("Encountered exception ", e);
}
}
}
string msg = null;
if (nnReg == null)
{
// consider as a rejection
msg = "Registration rejected by " + nnRpcAddress;
}
else
{
if (!nnReg.IsRole(HdfsServerConstants.NamenodeRole.Namenode))
{
msg = "Name-node " + nnRpcAddress + " is not active";
}
}
if (msg != null)
{
msg += ". Shutting down.";
Log.Error(msg);
throw new IOException(msg);
}
// stop the node
nnRpcAddress = nnReg.GetAddress();
}