/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hdfs.server.datanode;
import com.google.common.base.Joiner;
import com.google.common.collect.Lists;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.conf.ReconfigurationException;
import org.apache.hadoop.fs.BlockLocation;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.StorageType;
import org.apache.hadoop.hdfs.BlockMissingException;
import org.apache.hadoop.hdfs.DFSConfigKeys;
import org.apache.hadoop.hdfs.DFSTestUtil;
import org.apache.hadoop.hdfs.DistributedFileSystem;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.MiniDFSNNTopology;
import org.apache.hadoop.hdfs.protocol.BlockListAsLongs;
import org.apache.hadoop.hdfs.protocol.ExtendedBlock;
import org.apache.hadoop.hdfs.protocolPB.DatanodeProtocolClientSideTranslatorPB;
import org.apache.hadoop.hdfs.server.common.Storage;
import org.apache.hadoop.hdfs.server.datanode.fsdataset.FsDatasetSpi;
import org.apache.hadoop.hdfs.server.datanode.fsdataset.FsVolumeSpi;
import org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetTestUtil;
import org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsVolumeImpl;
import org.apache.hadoop.hdfs.server.protocol.BlockReportContext;
import org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration;
import org.apache.hadoop.hdfs.server.protocol.DatanodeStorage;
import org.apache.hadoop.hdfs.server.protocol.StorageBlockReport;
import org.apache.hadoop.test.GenericTestUtils;
import org.apache.hadoop.util.Time;
import org.junit.After;
import org.junit.Assert;
import org.junit.Ignore;
import org.junit.Test;
import java.io.File;
import java.io.IOException;
import java.net.URI;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.Map;
import java.util.Random;
import java.util.concurrent.BrokenBarrierException;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.CyclicBarrier;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import java.util.concurrent.atomic.AtomicBoolean;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.mockito.Mockito;
import org.mockito.invocation.InvocationOnMock;
import org.mockito.stubbing.Answer;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_DATANODE_DATA_DIR_KEY;
import static org.hamcrest.CoreMatchers.anyOf;
import static org.hamcrest.CoreMatchers.containsString;
import static org.hamcrest.CoreMatchers.not;
import static org.hamcrest.core.Is.is;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import static org.junit.Assume.assumeTrue;
import static org.mockito.Matchers.any;
import static org.mockito.Matchers.anyString;
import static org.mockito.Mockito.doAnswer;
import static org.mockito.Mockito.timeout;
public class TestDataNodeHotSwapVolumes {
private static final Log LOG = LogFactory.getLog(
TestDataNodeHotSwapVolumes.class);
private static final int BLOCK_SIZE = 512;
private static final int DEFAULT_STORAGES_PER_DATANODE = 2;
private MiniDFSCluster cluster;
@After
public void tearDown() {
shutdown();
}
private void startDFSCluster(int numNameNodes, int numDataNodes)
throws IOException {
startDFSCluster(numNameNodes, numDataNodes, DEFAULT_STORAGES_PER_DATANODE);
}
private void startDFSCluster(int numNameNodes, int numDataNodes,
int storagePerDataNode) throws IOException {
shutdown();
Configuration conf = new Configuration();
conf.setLong(DFSConfigKeys.DFS_BLOCK_SIZE_KEY, BLOCK_SIZE);
/*
* Lower the DN heartbeat, DF rate, and recheck interval to one second
* so state about failures and datanode death propagates faster.
*/
conf.setInt(DFSConfigKeys.DFS_HEARTBEAT_INTERVAL_KEY, 1);
conf.setInt(DFSConfigKeys.DFS_DF_INTERVAL_KEY, 1000);
conf.setInt(DFSConfigKeys.DFS_NAMENODE_HEARTBEAT_RECHECK_INTERVAL_KEY,
1000);
/* Allow 1 volume failure */
conf.setInt(DFSConfigKeys.DFS_DATANODE_FAILED_VOLUMES_TOLERATED_KEY, 1);
conf.setTimeDuration(DFSConfigKeys.DFS_DATANODE_DISK_CHECK_MIN_GAP_KEY,
0, TimeUnit.MILLISECONDS);
MiniDFSNNTopology nnTopology =
MiniDFSNNTopology.simpleFederatedTopology(numNameNodes);
cluster = new MiniDFSCluster.Builder(conf)
.nnTopology(nnTopology)
.numDataNodes(numDataNodes)
.storagesPerDatanode(storagePerDataNode)
.build();
cluster.waitActive();
}
private void shutdown() {
if (cluster != null) {
cluster.shutdown();
cluster = null;
}
}
private void createFile(Path path, int numBlocks)
throws IOException, InterruptedException, TimeoutException {
final short replicateFactor = 1;
createFile(path, numBlocks, replicateFactor);
}
private void createFile(Path path, int numBlocks, short replicateFactor)
throws IOException, InterruptedException, TimeoutException {
createFile(0, path, numBlocks, replicateFactor);
}
private void createFile(int fsIdx, Path path, int numBlocks)
throws IOException, InterruptedException, TimeoutException {
final short replicateFactor = 1;
createFile(fsIdx, path, numBlocks, replicateFactor);
}
private void createFile(int fsIdx, Path path, int numBlocks,
short replicateFactor)
throws IOException, TimeoutException, InterruptedException {
final int seed = 0;
final DistributedFileSystem fs = cluster.getFileSystem(fsIdx);
DFSTestUtil.createFile(fs, path, BLOCK_SIZE * numBlocks,
replicateFactor, seed);
DFSTestUtil.waitReplication(fs, path, replicateFactor);
}
/**
* Verify whether a file has enough content.
*/
private static void verifyFileLength(FileSystem fs, Path path, int numBlocks)
throws IOException {
FileStatus status = fs.getFileStatus(path);
assertEquals(numBlocks * BLOCK_SIZE, status.getLen());
}
/** Return the number of replicas for a given block in the file. */
private static int getNumReplicas(FileSystem fs, Path file,
int blockIdx) throws IOException {
BlockLocation locs[] = fs.getFileBlockLocations(file, 0, Long.MAX_VALUE);
return locs.length < blockIdx + 1 ? 0 : locs[blockIdx].getNames().length;
}
/**
* Wait the block to have the exact number of replicas as expected.
*/
private static void waitReplication(FileSystem fs, Path file, int blockIdx,
int numReplicas)
throws IOException, TimeoutException, InterruptedException {
int attempts = 50; // Wait 5 seconds.
while (attempts > 0) {
int actualReplicas = getNumReplicas(fs, file, blockIdx);
if (actualReplicas == numReplicas) {
return;
}
System.out.printf("Block %d of file %s has %d replicas (desired %d).\n",
blockIdx, file.toString(), actualReplicas, numReplicas);
Thread.sleep(100);
attempts--;
}
throw new TimeoutException("Timed out waiting the " + blockIdx + "-th block"
+ " of " + file + " to have " + numReplicas + " replicas.");
}
/** Parses data dirs from DataNode's configuration. */
private static List<String> getDataDirs(DataNode datanode) {
return new ArrayList<String>(datanode.getConf().getTrimmedStringCollection(
DFSConfigKeys.DFS_DATANODE_DATA_DIR_KEY));
}
/** Force the DataNode to report missing blocks immediately. */
private static void triggerDeleteReport(DataNode datanode)
throws IOException {
datanode.scheduleAllBlockReport(0);
DataNodeTestUtils.triggerDeletionReport(datanode);
}
@Test
public void testParseChangedVolumes() throws IOException {
startDFSCluster(1, 1);
DataNode dn = cluster.getDataNodes().get(0);
Configuration conf = dn.getConf();
String oldPaths = conf.get(DFS_DATANODE_DATA_DIR_KEY);
List<StorageLocation> oldLocations = new ArrayList<StorageLocation>();
for (String path : oldPaths.split(",")) {
oldLocations.add(StorageLocation.parse(path));
}
assertFalse(oldLocations.isEmpty());
String newPaths = oldLocations.get(0).getFile().getAbsolutePath() +
",/foo/path1,/foo/path2";
DataNode.ChangedVolumes changedVolumes =
dn.parseChangedVolumes(newPaths);
List<StorageLocation> newVolumes = changedVolumes.newLocations;
assertEquals(2, newVolumes.size());
assertEquals(new File("/foo/path1").getAbsolutePath(),
newVolumes.get(0).getFile().getAbsolutePath());
assertEquals(new File("/foo/path2").getAbsolutePath(),
newVolumes.get(1).getFile().getAbsolutePath());
List<StorageLocation> removedVolumes = changedVolumes.deactivateLocations;
assertEquals(1, removedVolumes.size());
assertEquals(oldLocations.get(1).getFile(),
removedVolumes.get(0).getFile());
assertEquals(1, changedVolumes.unchangedLocations.size());
assertEquals(oldLocations.get(0).getFile(),
changedVolumes.unchangedLocations.get(0).getFile());
}
@Test
public void testParseChangedVolumesFailures() throws IOException {
startDFSCluster(1, 1);
DataNode dn = cluster.getDataNodes().get(0);
try {
dn.parseChangedVolumes("");
fail("Should throw IOException: empty inputs.");
} catch (IOException e) {
GenericTestUtils.assertExceptionContains("No directory is specified.", e);
}
}
@Test
public void testParseStorageTypeChanges() throws IOException {
startDFSCluster(1, 1);
DataNode dn = cluster.getDataNodes().get(0);
Configuration conf = dn.getConf();
List<StorageLocation> oldLocations = DataNode.getStorageLocations(conf);
// Change storage type of an existing StorageLocation
String newLoc = String.format("[%s]%s", StorageType.SSD,
oldLocations.get(1).getUri());
String newDataDirs = oldLocations.get(0).toString() + "," + newLoc;
try {
dn.parseChangedVolumes(newDataDirs);
fail("should throw IOE because storage type changes.");
} catch (IOException e) {
GenericTestUtils.assertExceptionContains(
"Changing storage type is not allowed", e);
}
}
/** Add volumes to the first DataNode. */
private void addVolumes(int numNewVolumes)
throws InterruptedException, IOException, ReconfigurationException {
addVolumes(numNewVolumes, new CountDownLatch(0));
}
private void addVolumes(int numNewVolumes, CountDownLatch waitLatch)
throws ReconfigurationException, IOException, InterruptedException {
File dataDir = new File(cluster.getDataDirectory());
DataNode dn = cluster.getDataNodes().get(0); // First DataNode.
Configuration conf = dn.getConf();
String oldDataDir = conf.get(DFS_DATANODE_DATA_DIR_KEY);
List<File> newVolumeDirs = new ArrayList<File>();
StringBuilder newDataDirBuf = new StringBuilder(oldDataDir);
int startIdx = oldDataDir.split(",").length + 1;
// Find the first available (non-taken) directory name for data volume.
while (true) {
File volumeDir = new File(dataDir, "data" + startIdx);
if (!volumeDir.exists()) {
break;
}
startIdx++;
}
for (int i = startIdx; i < startIdx + numNewVolumes; i++) {
File volumeDir = new File(dataDir, "data" + String.valueOf(i));
newVolumeDirs.add(volumeDir);
volumeDir.mkdirs();
newDataDirBuf.append(",");
newDataDirBuf.append(
StorageLocation.parse(volumeDir.toString()).toString());
}
String newDataDir = newDataDirBuf.toString();
assertThat(
"DN did not update its own config",
dn.reconfigurePropertyImpl(DFS_DATANODE_DATA_DIR_KEY, newDataDir),
is(conf.get(DFS_DATANODE_DATA_DIR_KEY)));
// Await on the latch for needed operations to complete
waitLatch.await();
// Verify the configuration value is appropriately set.
String[] effectiveDataDirs = conf.get(DFS_DATANODE_DATA_DIR_KEY).split(",");
String[] expectDataDirs = newDataDir.split(",");
assertEquals(expectDataDirs.length, effectiveDataDirs.length);
List<StorageLocation> expectedStorageLocations = new ArrayList<>();
List<StorageLocation> effectiveStorageLocations = new ArrayList<>();
for (int i = 0; i < expectDataDirs.length; i++) {
StorageLocation expectLocation = StorageLocation.parse(expectDataDirs[i]);
StorageLocation effectiveLocation = StorageLocation
.parse(effectiveDataDirs[i]);
expectedStorageLocations.add(expectLocation);
effectiveStorageLocations.add(effectiveLocation);
}
Comparator<StorageLocation> comparator = new Comparator<StorageLocation>() {
@Override
public int compare(StorageLocation o1, StorageLocation o2) {
return o1.toString().compareTo(o2.toString());
}
};
Collections.sort(expectedStorageLocations, comparator);
Collections.sort(effectiveStorageLocations, comparator);
assertEquals("Effective volumes doesnt match expected",
expectedStorageLocations, effectiveStorageLocations);
// Check that all newly created volumes are appropriately formatted.
for (File volumeDir : newVolumeDirs) {
File curDir = new File(volumeDir, "current");
assertTrue(curDir.exists());
assertTrue(curDir.isDirectory());
}
}
private List<List<Integer>> getNumBlocksReport(int namesystemIdx) {
List<List<Integer>> results = new ArrayList<List<Integer>>();
final String bpid = cluster.getNamesystem(namesystemIdx).getBlockPoolId();
List<Map<DatanodeStorage, BlockListAsLongs>> blockReports =
cluster.getAllBlockReports(bpid);
for (Map<DatanodeStorage, BlockListAsLongs> datanodeReport : blockReports) {
List<Integer> numBlocksPerDN = new ArrayList<Integer>();
for (BlockListAsLongs blocks : datanodeReport.values()) {
numBlocksPerDN.add(blocks.getNumberOfBlocks());
}
results.add(numBlocksPerDN);
}
return results;
}
/**
* Test adding one volume on a running MiniDFSCluster with only one NameNode.
*/
@Test(timeout=60000)
public void testAddOneNewVolume()
throws IOException, ReconfigurationException,
InterruptedException, TimeoutException {
startDFSCluster(1, 1);
String bpid = cluster.getNamesystem().getBlockPoolId();
final int numBlocks = 10;
addVolumes(1);
Path testFile = new Path("/test");
createFile(testFile, numBlocks);
List<Map<DatanodeStorage, BlockListAsLongs>> blockReports =
cluster.getAllBlockReports(bpid);
assertEquals(1, blockReports.size()); // 1 DataNode
assertEquals(3, blockReports.get(0).size()); // 3 volumes
// FSVolumeList uses Round-Robin block chooser by default. Thus the new
// blocks should be evenly located in all volumes.
int minNumBlocks = Integer.MAX_VALUE;
int maxNumBlocks = Integer.MIN_VALUE;
for (BlockListAsLongs blockList : blockReports.get(0).values()) {
minNumBlocks = Math.min(minNumBlocks, blockList.getNumberOfBlocks());
maxNumBlocks = Math.max(maxNumBlocks, blockList.getNumberOfBlocks());
}
assertTrue(Math.abs(maxNumBlocks - maxNumBlocks) <= 1);
verifyFileLength(cluster.getFileSystem(), testFile, numBlocks);
}
@Test(timeout=60000)
public void testAddVolumesDuringWrite()
throws IOException, InterruptedException, TimeoutException,
ReconfigurationException {
startDFSCluster(1, 1);
int numVolumes = cluster.getStoragesPerDatanode();
String bpid = cluster.getNamesystem().getBlockPoolId();
Path testFile = new Path("/test");
// Each volume has 2 blocks
int initialBlockCount = numVolumes * 2;
createFile(testFile, initialBlockCount);
int newVolumeCount = 5;
addVolumes(newVolumeCount);
numVolumes += newVolumeCount;
int additionalBlockCount = 9;
int totalBlockCount = initialBlockCount + additionalBlockCount;
// Continue to write the same file, thus the new volumes will have blocks.
DFSTestUtil.appendFile(cluster.getFileSystem(), testFile,
BLOCK_SIZE * additionalBlockCount);
verifyFileLength(cluster.getFileSystem(), testFile, totalBlockCount);
// After appending data, each new volume added should
// have 1 block each.
List<Integer> expectedNumBlocks = Arrays.asList(1, 1, 1, 1, 1, 4, 4);
List<Map<DatanodeStorage, BlockListAsLongs>> blockReports =
cluster.getAllBlockReports(bpid);
assertEquals(1, blockReports.size()); // 1 DataNode
assertEquals(numVolumes, blockReports.get(0).size()); // 7 volumes
Map<DatanodeStorage, BlockListAsLongs> dnReport =
blockReports.get(0);
List<Integer> actualNumBlocks = new ArrayList<Integer>();
for (BlockListAsLongs blockList : dnReport.values()) {
actualNumBlocks.add(blockList.getNumberOfBlocks());
}
Collections.sort(actualNumBlocks);
assertEquals(expectedNumBlocks, actualNumBlocks);
}
@Test(timeout=180000)
public void testAddVolumesConcurrently()
throws IOException, InterruptedException, TimeoutException,
ReconfigurationException {
startDFSCluster(1, 1, 10);
int numVolumes = cluster.getStoragesPerDatanode();
String blockPoolId = cluster.getNamesystem().getBlockPoolId();
Path testFile = new Path("/test");
// Each volume has 2 blocks
int initialBlockCount = numVolumes * 2;
createFile(testFile, initialBlockCount);
final DataNode dn = cluster.getDataNodes().get(0);
final FsDatasetSpi<? extends FsVolumeSpi> data = dn.data;
dn.data = Mockito.spy(data);
final int newVolumeCount = 40;
final List<Thread> addVolumeDelayedThreads = new ArrayList<>();
final AtomicBoolean addVolumeError = new AtomicBoolean(false);
final AtomicBoolean listStorageError = new AtomicBoolean(false);
final CountDownLatch addVolumeCompletionLatch =
new CountDownLatch(newVolumeCount);
// Thread to list all storage available at DataNode,
// when the volumes are being added in parallel.
final Thread listStorageThread = new Thread(new Runnable() {
@Override
public void run() {
while (addVolumeCompletionLatch.getCount() != newVolumeCount) {
int i = 0;
while(i++ < 1000) {
try {
dn.getStorage().listStorageDirectories();
} catch (Exception e) {
listStorageError.set(true);
LOG.error("Error listing storage: " + e);
}
}
}
}
});
listStorageThread.start();
// FsDatasetImpl addVolume mocked to perform the operation asynchronously
doAnswer(new Answer<Object>() {
@Override
public Object answer(final InvocationOnMock invocationOnMock) throws Throwable {
final Random r = new Random();
Thread addVolThread =
new Thread(new Runnable() {
@Override
public void run() {
try {
r.setSeed(Time.now());
// Let 50% of add volume operations
// start after an initial delay.
if (r.nextInt(10) > 4) {
int s = r.nextInt(10) + 1;
Thread.sleep(s * 100);
}
invocationOnMock.callRealMethod();
} catch (Throwable throwable) {
addVolumeError.set(true);
LOG.error("Error adding volume: " + throwable);
} finally {
addVolumeCompletionLatch.countDown();
}
}
});
addVolumeDelayedThreads.add(addVolThread);
addVolThread.start();
return null;
}
}).when(dn.data).addVolume(any(StorageLocation.class), any(List.class));
addVolumes(newVolumeCount, addVolumeCompletionLatch);
numVolumes += newVolumeCount;
// Wait for all addVolume and listStorage Threads to complete
for (Thread t : addVolumeDelayedThreads) {
t.join();
}
listStorageThread.join();
// Verify errors while adding volumes and listing storage directories
Assert.assertEquals("Error adding volumes!", false, addVolumeError.get());
Assert.assertEquals("Error listing storage!",
false, listStorageError.get());
int additionalBlockCount = 9;
int totalBlockCount = initialBlockCount + additionalBlockCount;
// Continue to write the same file, thus the new volumes will have blocks.
DFSTestUtil.appendFile(cluster.getFileSystem(), testFile,
BLOCK_SIZE * additionalBlockCount);
verifyFileLength(cluster.getFileSystem(), testFile, totalBlockCount);
List<Map<DatanodeStorage, BlockListAsLongs>> blockReports =
cluster.getAllBlockReports(blockPoolId);
assertEquals(1, blockReports.size());
assertEquals(numVolumes, blockReports.get(0).size());
}
@Test(timeout=60000)
public void testAddVolumesToFederationNN()
throws IOException, TimeoutException, InterruptedException,
ReconfigurationException {
// Starts a Cluster with 2 NameNode and 3 DataNodes. Each DataNode has 2
// volumes.
final int numNameNodes = 2;
final int numDataNodes = 1;
startDFSCluster(numNameNodes, numDataNodes);
Path testFile = new Path("/test");
// Create a file on the first namespace with 4 blocks.
createFile(0, testFile, 4);
// Create a file on the second namespace with 4 blocks.
createFile(1, testFile, 4);
// Add 2 volumes to the first DataNode.
final int numNewVolumes = 2;
addVolumes(numNewVolumes);
// Append to the file on the first namespace.
DFSTestUtil.appendFile(cluster.getFileSystem(0), testFile, BLOCK_SIZE * 8);
List<List<Integer>> actualNumBlocks = getNumBlocksReport(0);
assertEquals(cluster.getDataNodes().size(), actualNumBlocks.size());
List<Integer> blocksOnFirstDN = actualNumBlocks.get(0);
Collections.sort(blocksOnFirstDN);
assertEquals(Arrays.asList(2, 2, 4, 4), blocksOnFirstDN);
// Verify the second namespace also has the new volumes and they are empty.
actualNumBlocks = getNumBlocksReport(1);
assertEquals(4, actualNumBlocks.get(0).size());
assertEquals(numNewVolumes,
Collections.frequency(actualNumBlocks.get(0), 0));
}
@Test(timeout=60000)
public void testRemoveOneVolume()
throws ReconfigurationException, InterruptedException, TimeoutException,
IOException {
startDFSCluster(1, 1);
final short replFactor = 1;
Path testFile = new Path("/test");
createFile(testFile, 10, replFactor);
DataNode dn = cluster.getDataNodes().get(0);
Collection<String> oldDirs = getDataDirs(dn);
String newDirs = oldDirs.iterator().next(); // Keep the first volume.
assertThat(
"DN did not update its own config",
dn.reconfigurePropertyImpl(
DFSConfigKeys.DFS_DATANODE_DATA_DIR_KEY, newDirs),
is(dn.getConf().get(DFS_DATANODE_DATA_DIR_KEY)));
assertFileLocksReleased(
new ArrayList<String>(oldDirs).subList(1, oldDirs.size()));
dn.scheduleAllBlockReport(0);
try {
DFSTestUtil.readFile(cluster.getFileSystem(), testFile);
fail("Expect to throw BlockMissingException.");
} catch (BlockMissingException e) {
GenericTestUtils.assertExceptionContains("Could not obtain block", e);
}
Path newFile = new Path("/newFile");
createFile(newFile, 6);
String bpid = cluster.getNamesystem().getBlockPoolId();
List<Map<DatanodeStorage, BlockListAsLongs>> blockReports =
cluster.getAllBlockReports(bpid);
assertEquals((int)replFactor, blockReports.size());
BlockListAsLongs blocksForVolume1 =
blockReports.get(0).values().iterator().next();
// The first volume has half of the testFile and full of newFile.
assertEquals(10 / 2 + 6, blocksForVolume1.getNumberOfBlocks());
}
@Test(timeout=60000)
public void testReplicatingAfterRemoveVolume()
throws InterruptedException, TimeoutException, IOException,
ReconfigurationException {
startDFSCluster(1, 2);
final FileSystem fs = cluster.getFileSystem();
final short replFactor = 2;
Path testFile = new Path("/test");
createFile(testFile, 4, replFactor);
DataNode dn = cluster.getDataNodes().get(0);
Collection<String> oldDirs = getDataDirs(dn);
// Findout the storage with block and remove it
ExtendedBlock block =
DFSTestUtil.getAllBlocks(fs, testFile).get(1).getBlock();
FsVolumeSpi volumeWithBlock = dn.getFSDataset().getVolume(block);
String basePath = volumeWithBlock.getBasePath();
File storageDir = new File(basePath);
URI fileUri = storageDir.toURI();
String dirWithBlock =
"[" + volumeWithBlock.getStorageType() + "]" + fileUri;
String newDirs = dirWithBlock;
for (String dir : oldDirs) {
if (dirWithBlock.startsWith(dir)) {
continue;
}
newDirs = dir;
break;
}
assertThat(
"DN did not update its own config",
dn.reconfigurePropertyImpl(
DFSConfigKeys.DFS_DATANODE_DATA_DIR_KEY, newDirs),
is(dn.getConf().get(DFS_DATANODE_DATA_DIR_KEY)));
oldDirs.remove(newDirs);
assertFileLocksReleased(oldDirs);
triggerDeleteReport(dn);
waitReplication(fs, testFile, 1, 1);
DFSTestUtil.waitReplication(fs, testFile, replFactor);
}
@Test
public void testAddVolumeFailures() throws IOException {
startDFSCluster(1, 1);
final String dataDir = cluster.getDataDirectory();
DataNode dn = cluster.getDataNodes().get(0);
List<String> newDirs = Lists.newArrayList();
final int NUM_NEW_DIRS = 4;
for (int i = 0; i < NUM_NEW_DIRS; i++) {
File newVolume = new File(dataDir, "new_vol" + i);
newDirs.add(newVolume.toString());
if (i % 2 == 0) {
// Make addVolume() fail.
newVolume.createNewFile();
}
}
String newValue = dn.getConf().get(DFS_DATANODE_DATA_DIR_KEY) + "," +
Joiner.on(",").join(newDirs);
try {
dn.reconfigurePropertyImpl(DFS_DATANODE_DATA_DIR_KEY, newValue);
fail("Expect to throw IOException.");
} catch (ReconfigurationException e) {
String errorMessage = e.getCause().getMessage();
String messages[] = errorMessage.split("\\r?\\n");
assertEquals(2, messages.length);
assertThat(messages[0], containsString("new_vol0"));
assertThat(messages[1], containsString("new_vol2"));
}
// Make sure that vol0 and vol2's metadata are not left in memory.
FsDatasetSpi<?> dataset = dn.getFSDataset();
try (FsDatasetSpi.FsVolumeReferences volumes =
dataset.getFsVolumeReferences()) {
for (FsVolumeSpi volume : volumes) {
assertThat(volume.getBasePath(), is(not(anyOf(
is(newDirs.get(0)), is(newDirs.get(2))))));
}
}
DataStorage storage = dn.getStorage();
for (int i = 0; i < storage.getNumStorageDirs(); i++) {
Storage.StorageDirectory sd = storage.getStorageDir(i);
assertThat(sd.getRoot().toString(),
is(not(anyOf(is(newDirs.get(0)), is(newDirs.get(2))))));
}
// The newly effective conf does not have vol0 and vol2.
String[] effectiveVolumes =
dn.getConf().get(DFS_DATANODE_DATA_DIR_KEY).split(",");
assertEquals(4, effectiveVolumes.length);
for (String ev : effectiveVolumes) {
assertThat(StorageLocation.parse(ev).getFile().getCanonicalPath(),
is(not(anyOf(is(newDirs.get(0)), is(newDirs.get(2))))));
}
}
/**
* Asserts that the storage lock file in each given directory has been
* released. This method works by trying to acquire the lock file itself. If
* locking fails here, then the main code must have failed to release it.
*
* @param dirs every storage directory to check
* @throws IOException if there is an unexpected I/O error
*/
private static void assertFileLocksReleased(Collection<String> dirs)
throws IOException {
for (String dir: dirs) {
try {
FsDatasetTestUtil.assertFileLockReleased(dir);
} catch (IOException e) {
LOG.warn(e);
}
}
}
@Test(timeout=180000)
@Ignore
public void testRemoveVolumeBeingWritten()
throws InterruptedException, TimeoutException, ReconfigurationException,
IOException, BrokenBarrierException {
// test against removing volumes on the different DataNode on the pipeline.
for (int i = 0; i < 3; i++) {
testRemoveVolumeBeingWrittenForDatanode(i);
}
}
/**
* Test the case that remove a data volume on a particular DataNode when the
* volume is actively being written.
* @param dataNodeIdx the index of the DataNode to remove a volume.
*/
private void testRemoveVolumeBeingWrittenForDatanode(int dataNodeIdx)
throws IOException, ReconfigurationException, TimeoutException,
InterruptedException, BrokenBarrierException {
// Starts DFS cluster with 3 DataNodes to form a pipeline.
startDFSCluster(1, 3);
final short REPLICATION = 3;
final DataNode dn = cluster.getDataNodes().get(dataNodeIdx);
final FileSystem fs = cluster.getFileSystem();
final Path testFile = new Path("/test");
final long lastTimeDiskErrorCheck = dn.getLastDiskErrorCheck();
FSDataOutputStream out = fs.create(testFile, REPLICATION);
Random rb = new Random(0);
byte[] writeBuf = new byte[BLOCK_SIZE / 2]; // half of the block.
rb.nextBytes(writeBuf);
out.write(writeBuf);
out.hflush();
// Make FsDatasetSpi#finalizeBlock a time-consuming operation. So if the
// BlockReceiver releases volume reference before finalizeBlock(), the blocks
// on the volume will be removed, and finalizeBlock() throws IOE.
final FsDatasetSpi<? extends FsVolumeSpi> data = dn.data;
dn.data = Mockito.spy(data);
doAnswer(new Answer<Object>() {
public Object answer(InvocationOnMock invocation)
throws IOException, InterruptedException {
Thread.sleep(1000);
// Bypass the argument to FsDatasetImpl#finalizeBlock to verify that
// the block is not removed, since the volume reference should not
// be released at this point.
data.finalizeBlock((ExtendedBlock) invocation.getArguments()[0]);
return null;
}
}).when(dn.data).finalizeBlock(any(ExtendedBlock.class));
final CyclicBarrier barrier = new CyclicBarrier(2);
List<String> oldDirs = getDataDirs(dn);
final String newDirs = oldDirs.get(1); // Remove the first volume.
final List<Exception> exceptions = new ArrayList<>();
Thread reconfigThread = new Thread() {
public void run() {
try {
barrier.await();
assertThat(
"DN did not update its own config",
dn.reconfigurePropertyImpl(DFS_DATANODE_DATA_DIR_KEY, newDirs),
is(dn.getConf().get(DFS_DATANODE_DATA_DIR_KEY)));
} catch (ReconfigurationException |
InterruptedException |
BrokenBarrierException e) {
exceptions.add(e);
}
}
};
reconfigThread.start();
barrier.await();
rb.nextBytes(writeBuf);
out.write(writeBuf);
out.hflush();
out.close();
reconfigThread.join();
// Verify the file has sufficient replications.
DFSTestUtil.waitReplication(fs, testFile, REPLICATION);
// Read the content back
byte[] content = DFSTestUtil.readFileBuffer(fs, testFile);
assertEquals(BLOCK_SIZE, content.length);
// If an IOException thrown from BlockReceiver#run, it triggers
// DataNode#checkDiskError(). So we can test whether checkDiskError() is called,
// to see whether there is IOException in BlockReceiver#run().
assertEquals(lastTimeDiskErrorCheck, dn.getLastDiskErrorCheck());
if (!exceptions.isEmpty()) {
throw new IOException(exceptions.get(0).getCause());
}
}
@Test(timeout=60000)
public void testAddBackRemovedVolume()
throws IOException, TimeoutException, InterruptedException,
ReconfigurationException {
startDFSCluster(1, 2);
// Create some data on every volume.
createFile(new Path("/test"), 32);
DataNode dn = cluster.getDataNodes().get(0);
Configuration conf = dn.getConf();
String oldDataDir = conf.get(DFS_DATANODE_DATA_DIR_KEY);
String keepDataDir = oldDataDir.split(",")[0];
String removeDataDir = oldDataDir.split(",")[1];
assertThat(
"DN did not update its own config",
dn.reconfigurePropertyImpl(DFS_DATANODE_DATA_DIR_KEY, keepDataDir),
is(dn.getConf().get(DFS_DATANODE_DATA_DIR_KEY)));
for (int i = 0; i < cluster.getNumNameNodes(); i++) {
String bpid = cluster.getNamesystem(i).getBlockPoolId();
BlockPoolSliceStorage bpsStorage =
dn.getStorage().getBPStorage(bpid);
// Make sure that there is no block pool level storage under removeDataDir.
for (int j = 0; j < bpsStorage.getNumStorageDirs(); j++) {
Storage.StorageDirectory sd = bpsStorage.getStorageDir(j);
assertFalse(sd.getRoot().getAbsolutePath().startsWith(
new File(removeDataDir).getAbsolutePath()
));
}
assertEquals(dn.getStorage().getBPStorage(bpid).getNumStorageDirs(), 1);
}
// Bring the removed directory back. It only successes if all metadata about
// this directory were removed from the previous step.
assertThat(
"DN did not update its own config",
dn.reconfigurePropertyImpl(DFS_DATANODE_DATA_DIR_KEY, oldDataDir),
is(dn.getConf().get(DFS_DATANODE_DATA_DIR_KEY)));
}
/**
* Verify that {@link DataNode#checkDiskError()} removes all metadata in
* DataNode upon a volume failure. Thus we can run reconfig on the same
* configuration to reload the new volume on the same directory as the failed one.
*/
@Test(timeout=60000)
public void testDirectlyReloadAfterCheckDiskError()
throws IOException, TimeoutException, InterruptedException,
ReconfigurationException {
// The test uses DataNodeTestUtils#injectDataDirFailure() to simulate
// volume failures which is currently not supported on Windows.
assumeTrue(!Path.WINDOWS);
startDFSCluster(1, 2);
createFile(new Path("/test"), 32, (short)2);
DataNode dn = cluster.getDataNodes().get(0);
final String oldDataDir = dn.getConf().get(DFS_DATANODE_DATA_DIR_KEY);
File dirToFail = new File(cluster.getDataDirectory(), "data1");
FsVolumeImpl failedVolume = DataNodeTestUtils.getVolume(dn, dirToFail);
assertTrue("No FsVolume was found for " + dirToFail,
failedVolume != null);
long used = failedVolume.getDfsUsed();
DataNodeTestUtils.injectDataDirFailure(dirToFail);
// Call and wait DataNode to detect disk failure.
long lastDiskErrorCheck = dn.getLastDiskErrorCheck();
dn.checkDiskErrorAsync(failedVolume);
while (dn.getLastDiskErrorCheck() == lastDiskErrorCheck) {
Thread.sleep(100);
}
createFile(new Path("/test1"), 32, (short)2);
assertEquals(used, failedVolume.getDfsUsed());
DataNodeTestUtils.restoreDataDirFromFailure(dirToFail);
assertThat(
"DN did not update its own config",
dn.reconfigurePropertyImpl(DFS_DATANODE_DATA_DIR_KEY, oldDataDir),
is(dn.getConf().get(DFS_DATANODE_DATA_DIR_KEY)));
createFile(new Path("/test2"), 32, (short)2);
FsVolumeImpl restoredVolume = DataNodeTestUtils.getVolume(dn, dirToFail);
assertTrue(restoredVolume != null);
assertTrue(restoredVolume != failedVolume);
// More data has been written to this volume.
assertTrue(restoredVolume.getDfsUsed() > used);
}
/** Test that a full block report is sent after hot swapping volumes */
@Test(timeout=100000)
public void testFullBlockReportAfterRemovingVolumes()
throws IOException, ReconfigurationException {
Configuration conf = new Configuration();
conf.setLong(DFSConfigKeys.DFS_BLOCK_SIZE_KEY, BLOCK_SIZE);
// Similar to TestTriggerBlockReport, set a really long value for
// dfs.heartbeat.interval, so that incremental block reports and heartbeats
// won't be sent during this test unless they're triggered
// manually.
conf.setLong(DFSConfigKeys.DFS_BLOCKREPORT_INTERVAL_MSEC_KEY, 10800000L);
conf.setLong(DFSConfigKeys.DFS_HEARTBEAT_INTERVAL_KEY, 1080L);
cluster = new MiniDFSCluster.Builder(conf).numDataNodes(2).build();
cluster.waitActive();
final DataNode dn = cluster.getDataNodes().get(0);
DatanodeProtocolClientSideTranslatorPB spy =
InternalDataNodeTestUtils.spyOnBposToNN(dn, cluster.getNameNode());
// Remove a data dir from datanode
File dataDirToKeep = new File(cluster.getDataDirectory(), "data1");
assertThat(
"DN did not update its own config",
dn.reconfigurePropertyImpl(
DFS_DATANODE_DATA_DIR_KEY, dataDirToKeep.toString()),
is(dn.getConf().get(DFS_DATANODE_DATA_DIR_KEY)));
// We should get 1 full report
Mockito.verify(spy, timeout(60000).times(1)).blockReport(
any(DatanodeRegistration.class),
anyString(),
any(StorageBlockReport[].class),
any(BlockReportContext.class));
}
}