public virtual void TestReplicationError()
{
// create a file of replication factor of 1
Path fileName = new Path("/test.txt");
int fileLen = 1;
DFSTestUtil.CreateFile(fs, fileName, 1, (short)1, 1L);
DFSTestUtil.WaitReplication(fs, fileName, (short)1);
// get the block belonged to the created file
LocatedBlocks blocks = NameNodeAdapter.GetBlockLocations(cluster.GetNameNode(), fileName
.ToString(), 0, (long)fileLen);
NUnit.Framework.Assert.AreEqual("Should only find 1 block", blocks.LocatedBlockCount
(), 1);
LocatedBlock block = blocks.Get(0);
// bring up a second datanode
cluster.StartDataNodes(conf, 1, true, null, null);
cluster.WaitActive();
int sndNode = 1;
DataNode datanode = cluster.GetDataNodes()[sndNode];
// replicate the block to the second datanode
IPEndPoint target = datanode.GetXferAddress();
Socket s = Sharpen.Extensions.CreateSocket(target.Address, target.Port);
// write the header.
DataOutputStream @out = new DataOutputStream(s.GetOutputStream());
DataChecksum checksum = DataChecksum.NewDataChecksum(DataChecksum.Type.Crc32, 512
);
new Sender(@out).WriteBlock(block.GetBlock(), StorageType.Default, BlockTokenSecretManager
.DummyToken, string.Empty, new DatanodeInfo[0], new StorageType[0], null, BlockConstructionStage
.PipelineSetupCreate, 1, 0L, 0L, 0L, checksum, CachingStrategy.NewDefaultStrategy
(), false, false, null);
@out.Flush();
// close the connection before sending the content of the block
@out.Close();
// the temporary block & meta files should be deleted
string bpid = cluster.GetNamesystem().GetBlockPoolId();
FilePath storageDir = cluster.GetInstanceStorageDir(sndNode, 0);
FilePath dir1 = MiniDFSCluster.GetRbwDir(storageDir, bpid);
storageDir = cluster.GetInstanceStorageDir(sndNode, 1);
FilePath dir2 = MiniDFSCluster.GetRbwDir(storageDir, bpid);
while (dir1.ListFiles().Length != 0 || dir2.ListFiles().Length != 0)
{
Sharpen.Thread.Sleep(100);
}
// then increase the file's replication factor
fs.SetReplication(fileName, (short)2);
// replication should succeed
DFSTestUtil.WaitReplication(fs, fileName, (short)1);
// clean up the file
fs.Delete(fileName, false);
}
/// <summary>try to access a block on a data node.</summary>
/// <remarks>try to access a block on a data node. If fails - throws exception</remarks>
/// <param name="datanode"/>
/// <param name="lblock"/>
/// <exception cref="System.IO.IOException"/>
private void AccessBlock(DatanodeInfo datanode, LocatedBlock lblock)
{
IPEndPoint targetAddr = null;
ExtendedBlock block = lblock.GetBlock();
targetAddr = NetUtils.CreateSocketAddr(datanode.GetXferAddr());
BlockReader blockReader = new BlockReaderFactory(new DFSClient.Conf(conf)).SetInetSocketAddress
(targetAddr).SetBlock(block).SetFileName(BlockReaderFactory.GetFileName(targetAddr
, "test-blockpoolid", block.GetBlockId())).SetBlockToken(lblock.GetBlockToken())
.SetStartOffset(0).SetLength(-1).SetVerifyChecksum(true).SetClientName("TestDataNodeVolumeFailure"
).SetDatanodeInfo(datanode).SetCachingStrategy(CachingStrategy.NewDefaultStrategy
()).SetClientCacheContext(ClientContext.GetFromConf(conf)).SetConfiguration(conf
).SetRemotePeerFactory(new _RemotePeerFactory_422(this)).Build();
blockReader.Close();
}