/// <exception cref="System.IO.IOException"/>
private void ValidateNumberReplicas(int expectedReplicas)
{
NumberReplicas numberReplicas = blockManager.CountNodes(block);
Assert.AssertThat(numberReplicas.LiveReplicas(), CoreMatchers.Is(expectedReplicas
));
Assert.AssertThat(numberReplicas.ExcessReplicas(), CoreMatchers.Is(0));
Assert.AssertThat(numberReplicas.CorruptReplicas(), CoreMatchers.Is(0));
Assert.AssertThat(numberReplicas.DecommissionedReplicas(), CoreMatchers.Is(0));
Assert.AssertThat(numberReplicas.ReplicasOnStaleNodes(), CoreMatchers.Is(0));
BlockManagerTestUtil.UpdateState(blockManager);
Assert.AssertThat(blockManager.GetUnderReplicatedBlocksCount(), CoreMatchers.Is(0L
));
Assert.AssertThat(blockManager.GetExcessBlocksCount(), CoreMatchers.Is(0L));
}
public virtual void TestInvalidateOverReplicatedBlock()
{
Configuration conf = new HdfsConfiguration();
MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).NumDataNodes(3).Build();
try
{
FSNamesystem namesystem = cluster.GetNamesystem();
BlockManager bm = namesystem.GetBlockManager();
FileSystem fs = cluster.GetFileSystem();
Path p = new Path(MiniDFSCluster.GetBaseDirectory(), "/foo1");
FSDataOutputStream @out = fs.Create(p, (short)2);
@out.WriteBytes("HDFS-3119: " + p);
@out.Hsync();
fs.SetReplication(p, (short)1);
@out.Close();
ExtendedBlock block = DFSTestUtil.GetFirstBlock(fs, p);
NUnit.Framework.Assert.AreEqual("Expected only one live replica for the block", 1
, bm.CountNodes(block.GetLocalBlock()).LiveReplicas());
}
finally
{
cluster.Shutdown();
}
}
/// <returns>
/// a tuple of the replica state (number racks, number live
/// replicas, and number needed replicas) for the given block.
/// </returns>
public static int[] GetReplicaInfo(FSNamesystem namesystem, Block b)
{
BlockManager bm = namesystem.GetBlockManager();
namesystem.ReadLock();
try
{
return(new int[] { GetNumberOfRacks(bm, b), bm.CountNodes(b).LiveReplicas(), bm.neededReplications
.Contains(b) ? 1 : 0 });
}
finally
{
namesystem.ReadUnlock();
}
}
public virtual void TestProcesOverReplicateBlock()
{
Configuration conf = new HdfsConfiguration();
conf.SetLong(DFSConfigKeys.DfsDatanodeScanPeriodHoursKey, 100L);
conf.SetLong(DFSConfigKeys.DfsBlockreportIntervalMsecKey, 1000L);
conf.Set(DFSConfigKeys.DfsNamenodeReplicationPendingTimeoutSecKey, Sharpen.Extensions.ToString
(2));
MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).NumDataNodes(3).Build();
FileSystem fs = cluster.GetFileSystem();
try
{
Path fileName = new Path("/foo1");
DFSTestUtil.CreateFile(fs, fileName, 2, (short)3, 0L);
DFSTestUtil.WaitReplication(fs, fileName, (short)3);
// corrupt the block on datanode 0
ExtendedBlock block = DFSTestUtil.GetFirstBlock(fs, fileName);
NUnit.Framework.Assert.IsTrue(cluster.CorruptReplica(0, block));
MiniDFSCluster.DataNodeProperties dnProps = cluster.StopDataNode(0);
// remove block scanner log to trigger block scanning
FilePath scanCursor = new FilePath(new FilePath(MiniDFSCluster.GetFinalizedDir(cluster
.GetInstanceStorageDir(0, 0), cluster.GetNamesystem().GetBlockPoolId()).GetParent
()).GetParent(), "scanner.cursor");
//wait for one minute for deletion to succeed;
for (int i = 0; !scanCursor.Delete(); i++)
{
NUnit.Framework.Assert.IsTrue("Could not delete " + scanCursor.GetAbsolutePath()
+ " in one minute", i < 60);
try
{
Sharpen.Thread.Sleep(1000);
}
catch (Exception)
{
}
}
// restart the datanode so the corrupt replica will be detected
cluster.RestartDataNode(dnProps);
DFSTestUtil.WaitReplication(fs, fileName, (short)2);
string blockPoolId = cluster.GetNamesystem().GetBlockPoolId();
DatanodeID corruptDataNode = DataNodeTestUtils.GetDNRegistrationForBP(cluster.GetDataNodes
()[2], blockPoolId);
FSNamesystem namesystem = cluster.GetNamesystem();
BlockManager bm = namesystem.GetBlockManager();
HeartbeatManager hm = bm.GetDatanodeManager().GetHeartbeatManager();
try
{
namesystem.WriteLock();
lock (hm)
{
// set live datanode's remaining space to be 0
// so they will be chosen to be deleted when over-replication occurs
string corruptMachineName = corruptDataNode.GetXferAddr();
foreach (DatanodeDescriptor datanode in hm.GetDatanodes())
{
if (!corruptMachineName.Equals(datanode.GetXferAddr()))
{
datanode.GetStorageInfos()[0].SetUtilizationForTesting(100L, 100L, 0, 100L);
datanode.UpdateHeartbeat(BlockManagerTestUtil.GetStorageReportsForDatanode(datanode
), 0L, 0L, 0, 0, null);
}
}
// decrease the replication factor to 1;
NameNodeAdapter.SetReplication(namesystem, fileName.ToString(), (short)1);
// corrupt one won't be chosen to be excess one
// without 4910 the number of live replicas would be 0: block gets lost
NUnit.Framework.Assert.AreEqual(1, bm.CountNodes(block.GetLocalBlock()).LiveReplicas
());
}
}
finally
{
namesystem.WriteUnlock();
}
}
finally
{
cluster.Shutdown();
}
}
