/// <summary>Check whether the BackupNode can be started.</summary>
/// <exception cref="System.IO.IOException"/>
private bool CanStartBackupNode(Configuration conf)
{
BackupNode bn = null;
try
{
bn = StartBackupNode(conf);
}
catch (IOException e)
{
if (e is BindException)
{
return(false);
}
throw;
}
finally
{
if (bn != null)
{
bn.Stop();
}
}
return(true);
}
/// <summary>Start the BackupNode</summary>
/// <exception cref="System.IO.IOException"/>
public virtual BackupNode StartBackupNode(Configuration conf)
{
// Set up testing environment directories
hdfsDir = new FilePath(TestDataDir, "backupNode");
if (hdfsDir.Exists() && !FileUtil.FullyDelete(hdfsDir))
{
throw new IOException("Could not delete hdfs directory '" + hdfsDir + "'");
}
FilePath currDir = new FilePath(hdfsDir, "name2");
FilePath currDir2 = new FilePath(currDir, "current");
FilePath currDir3 = new FilePath(currDir, "image");
NUnit.Framework.Assert.IsTrue(currDir.Mkdirs());
NUnit.Framework.Assert.IsTrue(currDir2.Mkdirs());
NUnit.Framework.Assert.IsTrue(currDir3.Mkdirs());
conf.Set(DFSConfigKeys.DfsNamenodeNameDirKey, Util.FileAsURI(new FilePath(hdfsDir
, "name2")).ToString());
conf.Set(DFSConfigKeys.DfsNamenodeEditsDirKey, "${" + DFSConfigKeys.DfsNamenodeNameDirKey
+ "}");
// Start BackupNode
string[] args = new string[] { HdfsServerConstants.StartupOption.Backup.GetName() };
BackupNode bu = (BackupNode)NameNode.CreateNameNode(args, conf);
return(bu);
}
