public virtual void TestUpgradeFromRel2ReservedImage()
{
UnpackStorage(Hadoop2ReservedImage, HadoopDfsDirTxt);
MiniDFSCluster cluster = null;
// Try it once without setting the upgrade flag to ensure it fails
Configuration conf = new Configuration();
try
{
cluster = new MiniDFSCluster.Builder(conf).Format(false).StartupOption(HdfsServerConstants.StartupOption
.Upgrade).NumDataNodes(0).Build();
}
catch (ArgumentException e)
{
GenericTestUtils.AssertExceptionContains("reserved path component in this version"
, e);
}
finally
{
if (cluster != null)
{
cluster.Shutdown();
}
}
// Try it again with a custom rename string
try
{
FSImageFormat.SetRenameReservedPairs(".snapshot=.user-snapshot," + ".reserved=.my-reserved"
);
cluster = new MiniDFSCluster.Builder(conf).Format(false).StartupOption(HdfsServerConstants.StartupOption
.Upgrade).NumDataNodes(0).Build();
DistributedFileSystem dfs = cluster.GetFileSystem();
// Make sure the paths were renamed as expected
// Also check that paths are present after a restart, checks that the
// upgraded fsimage has the same state.
string[] expected = new string[] { "/edits", "/edits/.reserved", "/edits/.user-snapshot"
, "/edits/.user-snapshot/editsdir", "/edits/.user-snapshot/editsdir/editscontents"
, "/edits/.user-snapshot/editsdir/editsdir2", "/image", "/image/.reserved", "/image/.user-snapshot"
, "/image/.user-snapshot/imagedir", "/image/.user-snapshot/imagedir/imagecontents"
, "/image/.user-snapshot/imagedir/imagedir2", "/.my-reserved", "/.my-reserved/edits-touch"
, "/.my-reserved/image-touch" };
for (int i = 0; i < 2; i++)
{
// Restart the second time through this loop
if (i == 1)
{
cluster.FinalizeCluster(conf);
cluster.RestartNameNode(true);
}
AList <Path> toList = new AList <Path>();
toList.AddItem(new Path("/"));
AList <string> found = new AList <string>();
while (!toList.IsEmpty())
{
Path p = toList.Remove(0);
FileStatus[] statuses = dfs.ListStatus(p);
foreach (FileStatus status in statuses)
{
string path = status.GetPath().ToUri().GetPath();
System.Console.Out.WriteLine("Found path " + path);
found.AddItem(path);
if (status.IsDirectory())
{
toList.AddItem(status.GetPath());
}
}
}
foreach (string s in expected)
{
NUnit.Framework.Assert.IsTrue("Did not find expected path " + s, found.Contains(s
));
}
NUnit.Framework.Assert.AreEqual("Found an unexpected path while listing filesystem"
, found.Count, expected.Length);
}
}
finally
{
if (cluster != null)
{
cluster.Shutdown();
}
}
}