/// <summary>
/// Support for layout version change with rolling upgrade was
/// added by HDFS-6800 and HDFS-6981.
/// </summary>
/// <exception cref="System.Exception"/>
public virtual void TestWithLayoutChangeAndFinalize()
{
long seed = unchecked ((int)(0x600DF00D));
try
{
StartCluster();
Path[] paths = new Path[3];
FilePath[] blockFiles = new FilePath[3];
// Create two files in DFS.
for (int i = 0; i < 2; ++i)
{
paths[i] = new Path("/" + GenericTestUtils.GetMethodName() + "." + i + ".dat");
DFSTestUtil.CreateFile(fs, paths[i], BlockSize, (short)2, seed);
}
StartRollingUpgrade();
// Delete the first file. The DN will save its block files in trash.
blockFiles[0] = GetBlockForFile(paths[0], true);
FilePath trashFile0 = GetTrashFileForBlock(blockFiles[0], false);
DeleteAndEnsureInTrash(paths[0], blockFiles[0], trashFile0);
// Restart the DN with a new layout version to trigger layout upgrade.
Log.Info("Shutting down the Datanode");
MiniDFSCluster.DataNodeProperties dnprop = cluster.StopDataNode(0);
DFSTestUtil.AddDataNodeLayoutVersion(DataNodeLayoutVersion.CurrentLayoutVersion -
1, "Test Layout for TestDataNodeRollingUpgrade");
Log.Info("Restarting the DataNode");
cluster.RestartDataNode(dnprop, true);
cluster.WaitActive();
dn0 = cluster.GetDataNodes()[0];
Log.Info("The DN has been restarted");
NUnit.Framework.Assert.IsFalse(trashFile0.Exists());
NUnit.Framework.Assert.IsFalse(dn0.GetStorage().GetBPStorage(blockPoolId).IsTrashAllowed
(blockFiles[0]));
// Ensure that the block file for the first file was moved from 'trash' to 'previous'.
NUnit.Framework.Assert.IsTrue(IsBlockFileInPrevious(blockFiles[0]));
NUnit.Framework.Assert.IsFalse(IsTrashRootPresent());
// Delete the second file. Ensure that its block file is in previous.
blockFiles[1] = GetBlockForFile(paths[1], true);
fs.Delete(paths[1], false);
NUnit.Framework.Assert.IsTrue(IsBlockFileInPrevious(blockFiles[1]));
NUnit.Framework.Assert.IsFalse(IsTrashRootPresent());
// Finalize and ensure that neither block file exists in trash or previous.
FinalizeRollingUpgrade();
NUnit.Framework.Assert.IsFalse(IsTrashRootPresent());
NUnit.Framework.Assert.IsFalse(IsBlockFileInPrevious(blockFiles[0]));
NUnit.Framework.Assert.IsFalse(IsBlockFileInPrevious(blockFiles[1]));
}
finally
{
ShutdownCluster();
}
}
/// <summary>
/// Support for layout version change with rolling upgrade was
/// added by HDFS-6800 and HDFS-6981.
/// </summary>
/// <exception cref="System.Exception"/>
public virtual void TestWithLayoutChangeAndRollback()
{
long seed = unchecked ((int)(0x600DF00D));
try
{
StartCluster();
Path[] paths = new Path[3];
FilePath[] blockFiles = new FilePath[3];
// Create two files in DFS.
for (int i = 0; i < 2; ++i)
{
paths[i] = new Path("/" + GenericTestUtils.GetMethodName() + "." + i + ".dat");
DFSTestUtil.CreateFile(fs, paths[i], BlockSize, (short)1, seed);
}
StartRollingUpgrade();
// Delete the first file. The DN will save its block files in trash.
blockFiles[0] = GetBlockForFile(paths[0], true);
FilePath trashFile0 = GetTrashFileForBlock(blockFiles[0], false);
DeleteAndEnsureInTrash(paths[0], blockFiles[0], trashFile0);
// Restart the DN with a new layout version to trigger layout upgrade.
Log.Info("Shutting down the Datanode");
MiniDFSCluster.DataNodeProperties dnprop = cluster.StopDataNode(0);
DFSTestUtil.AddDataNodeLayoutVersion(DataNodeLayoutVersion.CurrentLayoutVersion -
1, "Test Layout for TestDataNodeRollingUpgrade");
Log.Info("Restarting the DataNode");
cluster.RestartDataNode(dnprop, true);
cluster.WaitActive();
dn0 = cluster.GetDataNodes()[0];
Log.Info("The DN has been restarted");
NUnit.Framework.Assert.IsFalse(trashFile0.Exists());
NUnit.Framework.Assert.IsFalse(dn0.GetStorage().GetBPStorage(blockPoolId).IsTrashAllowed
(blockFiles[0]));
// Ensure that the block file for the first file was moved from 'trash' to 'previous'.
NUnit.Framework.Assert.IsTrue(IsBlockFileInPrevious(blockFiles[0]));
NUnit.Framework.Assert.IsFalse(IsTrashRootPresent());
// Delete the second file. Ensure that its block file is in previous.
blockFiles[1] = GetBlockForFile(paths[1], true);
fs.Delete(paths[1], false);
NUnit.Framework.Assert.IsTrue(IsBlockFileInPrevious(blockFiles[1]));
NUnit.Framework.Assert.IsFalse(IsTrashRootPresent());
// Create and delete a third file. Its block file should not be
// in either trash or previous after deletion.
paths[2] = new Path("/" + GenericTestUtils.GetMethodName() + ".2.dat");
DFSTestUtil.CreateFile(fs, paths[2], BlockSize, (short)1, seed);
blockFiles[2] = GetBlockForFile(paths[2], true);
fs.Delete(paths[2], false);
NUnit.Framework.Assert.IsFalse(IsBlockFileInPrevious(blockFiles[2]));
NUnit.Framework.Assert.IsFalse(IsTrashRootPresent());
// Rollback and ensure that the first two file contents were restored.
RollbackRollingUpgrade();
for (int i_1 = 0; i_1 < 2; ++i_1)
{
byte[] actual = DFSTestUtil.ReadFileBuffer(fs, paths[i_1]);
byte[] calculated = DFSTestUtil.CalculateFileContentsFromSeed(seed, BlockSize);
Assert.AssertArrayEquals(actual, calculated);
}
// And none of the block files must be in previous or trash.
NUnit.Framework.Assert.IsFalse(IsTrashRootPresent());
for (int i_2 = 0; i_2 < 3; ++i_2)
{
NUnit.Framework.Assert.IsFalse(IsBlockFileInPrevious(blockFiles[i_2]));
}
}
finally
{
ShutdownCluster();
}
}
