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HDFS-6981. Fix DN upgrade with layout version change. (Arpit Agarwal)

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arp 2014-09-08 21:20:55 -07:00
parent 7498dd790e
commit f949f6b548
10 changed files with 386 additions and 50 deletions
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2
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -632,6 +632,8 @@ Release 2.6.0 - UNRELEASED
HDFS-6951. Correctly persist raw namespace xattrs to edit log and fsimage.
(clamb via wang)
HDFS-6981. Fix DN upgrade with layout version change. (Arpit Agarwal)
BREAKDOWN OF HDFS-6134 AND HADOOP-10150 SUBTASKS AND RELATED JIRAS
HDFS-6387. HDFS CLI admin tool for creating & deleting an

9
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BPOfferService.java
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@ -474,11 +474,14 @@ List<BPServiceActor> getBPServiceActors() {
* Signal the current rolling upgrade status as indicated by the NN.
* @param inProgress true if a rolling upgrade is in progress
*/
void signalRollingUpgrade(boolean inProgress) {
void signalRollingUpgrade(boolean inProgress) throws IOException {
String bpid = getBlockPoolId();
if (inProgress) {
dn.getFSDataset().enableTrash(getBlockPoolId());
dn.getFSDataset().enableTrash(bpid);
dn.getFSDataset().setRollingUpgradeMarker(bpid);
} else {
dn.getFSDataset().restoreTrash(getBlockPoolId());
dn.getFSDataset().restoreTrash(bpid);
dn.getFSDataset().clearRollingUpgradeMarker(bpid);
}
}

2
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BPServiceActor.java
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@ -627,7 +627,7 @@ private synchronized void cleanUp() {
bpos.shutdownActor(this);
}
private void handleRollingUpgradeStatus(HeartbeatResponse resp) {
private void handleRollingUpgradeStatus(HeartbeatResponse resp) throws IOException {
RollingUpgradeStatus rollingUpgradeStatus = resp.getRollingUpdateStatus();
if (rollingUpgradeStatus != null &&
rollingUpgradeStatus.getBlockPoolId().compareTo(bpos.getBlockPoolId()) != 0) {

120
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BlockPoolSliceStorage.java
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@ -19,6 +19,7 @@
package org.apache.hadoop.hdfs.server.datanode;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Preconditions;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.fs.FileUtil;
import org.apache.hadoop.fs.HardLink;
@ -38,8 +39,11 @@
import java.util.Collection;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Properties;
import java.util.Set;
import java.util.Collections;
import java.util.concurrent.ConcurrentHashMap;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
@ -62,6 +66,18 @@
public class BlockPoolSliceStorage extends Storage {
static final String TRASH_ROOT_DIR = "trash";
/**
* A marker file that is created on each root directory if a rolling upgrade
* is in progress. The NN does not inform the DN when a rolling upgrade is
* finalized. All the DN can infer is whether or not a rolling upgrade is
* currently in progress. When the rolling upgrade is not in progress:
* 1. If the marker file is present, then a rolling upgrade just completed.
* If a 'previous' directory exists, it can be deleted now.
* 2. If the marker file is absent, then a regular upgrade may be in
* progress. Do not delete the 'previous' directory.
*/
static final String ROLLING_UPGRADE_MARKER_FILE = "RollingUpgradeInProgress";
private static final String BLOCK_POOL_ID_PATTERN_BASE =
Pattern.quote(File.separator) +
"BP-\\d+-\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}-\\d+" +
@ -83,6 +99,13 @@ public BlockPoolSliceStorage(StorageInfo storageInfo, String bpid) {
blockpoolID = bpid;
}
/**
* These maps are used as an optimization to avoid one filesystem operation
* per storage on each heartbeat response.
*/
private static Set<String> storagesWithRollingUpgradeMarker;
private static Set<String> storagesWithoutRollingUpgradeMarker;
BlockPoolSliceStorage(int namespaceID, String bpID, long cTime,
String clusterId) {
super(NodeType.DATA_NODE);
@ -90,10 +113,18 @@ public BlockPoolSliceStorage(StorageInfo storageInfo, String bpid) {
this.blockpoolID = bpID;
this.cTime = cTime;
this.clusterID = clusterId;
storagesWithRollingUpgradeMarker = Collections.newSetFromMap(
new ConcurrentHashMap<String, Boolean>());
storagesWithoutRollingUpgradeMarker = Collections.newSetFromMap(
new ConcurrentHashMap<String, Boolean>());
}
private BlockPoolSliceStorage() {
super(NodeType.DATA_NODE);
storagesWithRollingUpgradeMarker = Collections.newSetFromMap(
new ConcurrentHashMap<String, Boolean>());
storagesWithoutRollingUpgradeMarker = Collections.newSetFromMap(
new ConcurrentHashMap<String, Boolean>());
}
/**
@ -270,13 +301,9 @@ protected void setFieldsFromProperties(Properties props, StorageDirectory sd)
private void doTransition(DataNode datanode, StorageDirectory sd,
NamespaceInfo nsInfo, StartupOption startOpt) throws IOException {
if (startOpt == StartupOption.ROLLBACK && sd.getPreviousDir().exists()) {
// we will already restore everything in the trash by rolling back to
// the previous directory, so we must delete the trash to ensure
// that it's not restored by BPOfferService.signalRollingUpgrade()
if (!FileUtil.fullyDelete(getTrashRootDir(sd))) {
throw new IOException("Unable to delete trash directory prior to " +
"restoration of previous directory: " + getTrashRootDir(sd));
}
Preconditions.checkState(!getTrashRootDir(sd).exists(),
sd.getPreviousDir() + " and " + getTrashRootDir(sd) + " should not " +
" both be present.");
doRollback(sd, nsInfo); // rollback if applicable
} else {
// Restore all the files in the trash. The restored files are retained
@ -440,10 +467,18 @@ private int restoreBlockFilesFromTrash(File trashRoot)
}
final File newChild = new File(restoreDirectory, child.getName());
if (!child.renameTo(newChild)) {
if (newChild.exists() && newChild.length() >= child.length()) {
// Failsafe - we should not hit this case but let's make sure
// we never overwrite a newer version of a block file with an
// older version.
LOG.info("Not overwriting " + newChild + " with smaller file from " +
"trash directory. This message can be safely ignored.");
} else if (!child.renameTo(newChild)) {
throw new IOException("Failed to rename " + child + " to " + newChild);
} else {
++filesRestored;
}
++filesRestored;
}
FileUtil.fullyDelete(trashRoot);
return filesRestored;
@ -599,6 +634,18 @@ private File getTrashRootDir(StorageDirectory sd) {
return new File(sd.getRoot(), TRASH_ROOT_DIR);
}
/**
* Determine whether we can use trash for the given blockFile. Trash
* is disallowed if a 'previous' directory exists for the
* storage directory containing the block.
*/
@VisibleForTesting
public boolean isTrashAllowed(File blockFile) {
Matcher matcher = BLOCK_POOL_CURRENT_PATH_PATTERN.matcher(blockFile.getParent());
String previousDir = matcher.replaceFirst("$1$2" + STORAGE_DIR_PREVIOUS);
return !(new File(previousDir)).exists();
}
/**
* Get a target subdirectory under trash/ for a given block file that is being
* deleted.
@ -609,9 +656,12 @@ private File getTrashRootDir(StorageDirectory sd) {
* @return the trash directory for a given block file that is being deleted.
*/
public String getTrashDirectory(File blockFile) {
Matcher matcher = BLOCK_POOL_CURRENT_PATH_PATTERN.matcher(blockFile.getParent());
String trashDirectory = matcher.replaceFirst("$1$2" + TRASH_ROOT_DIR + "$4");
return trashDirectory;
if (isTrashAllowed(blockFile)) {
Matcher matcher = BLOCK_POOL_CURRENT_PATH_PATTERN.matcher(blockFile.getParent());
String trashDirectory = matcher.replaceFirst("$1$2" + TRASH_ROOT_DIR + "$4");
return trashDirectory;
}
return null;
}
/**
@ -638,6 +688,7 @@ public void restoreTrash() {
for (StorageDirectory sd : storageDirs) {
File trashRoot = getTrashRootDir(sd);
try {
Preconditions.checkState(!(trashRoot.exists() && sd.getPreviousDir().exists()));
restoreBlockFilesFromTrash(trashRoot);
FileUtil.fullyDelete(getTrashRootDir(sd));
} catch (IOException ioe) {
@ -656,4 +707,49 @@ public boolean trashEnabled() {
}
return false;
}
/**
* Create a rolling upgrade marker file for each BP storage root, if it
* does not exist already.
*/
public void setRollingUpgradeMarkers(List<StorageDirectory> dnStorageDirs)
throws IOException {
for (StorageDirectory sd : dnStorageDirs) {
File bpRoot = getBpRoot(blockpoolID, sd.getCurrentDir());
File markerFile = new File(bpRoot, ROLLING_UPGRADE_MARKER_FILE);
if (!storagesWithRollingUpgradeMarker.contains(bpRoot.toString())) {
if (!markerFile.exists() && markerFile.createNewFile()) {
LOG.info("Created " + markerFile);
} else {
LOG.info(markerFile + " already exists.");
}
storagesWithRollingUpgradeMarker.add(bpRoot.toString());
storagesWithoutRollingUpgradeMarker.remove(bpRoot.toString());
}
}
}
/**
* Check whether the rolling upgrade marker file exists for each BP storage
* root. If it does exist, then the marker file is cleared and more
* importantly the layout upgrade is finalized.
*/
public void clearRollingUpgradeMarkers(List<StorageDirectory> dnStorageDirs)
throws IOException {
for (StorageDirectory sd : dnStorageDirs) {
File bpRoot = getBpRoot(blockpoolID, sd.getCurrentDir());
File markerFile = new File(bpRoot, ROLLING_UPGRADE_MARKER_FILE);
if (!storagesWithoutRollingUpgradeMarker.contains(bpRoot.toString())) {
if (markerFile.exists()) {
LOG.info("Deleting " + markerFile);
doFinalize(sd.getCurrentDir());
if (!markerFile.delete()) {
LOG.warn("Failed to delete " + markerFile);
}
}
storagesWithoutRollingUpgradeMarker.add(bpRoot.toString());
storagesWithRollingUpgradeMarker.remove(bpRoot.toString());
}
}
}
}

31
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataStorage.java
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@ -83,11 +83,17 @@ public class DataStorage extends Storage {
public final static String STORAGE_DIR_FINALIZED = "finalized";
public final static String STORAGE_DIR_TMP = "tmp";
// Set of bpids for which 'trash' is currently enabled.
// When trash is enabled block files are moved under a separate
// 'trash' folder instead of being deleted right away. This can
// be useful during rolling upgrades, for example.
// The set is backed by a concurrent HashMap.
/**
* Set of bpids for which 'trash' is currently enabled.
* When trash is enabled block files are moved under a separate
* 'trash' folder instead of being deleted right away. This can
* be useful during rolling upgrades, for example.
* The set is backed by a concurrent HashMap.
*
* Even if trash is enabled, it is not used if a layout upgrade
* is in progress for a storage directory i.e. if the previous
* directory exists.
*/
private Set<String> trashEnabledBpids;
/**
@ -136,7 +142,9 @@ public synchronized void createStorageID(StorageDirectory sd) {
}
/**
* Enable trash for the specified block pool storage.
* Enable trash for the specified block pool storage. Even if trash is
* enabled by the caller, it is superseded by the 'previous' directory
* if a layout upgrade is in progress.
*/
public void enableTrash(String bpid) {
if (trashEnabledBpids.add(bpid)) {
@ -156,6 +164,14 @@ public boolean trashEnabled(String bpid) {
return trashEnabledBpids.contains(bpid);
}
public void setRollingUpgradeMarker(String bpid) throws IOException {
getBPStorage(bpid).setRollingUpgradeMarkers(storageDirs);
}
public void clearRollingUpgradeMarker(String bpid) throws IOException {
getBPStorage(bpid).clearRollingUpgradeMarkers(storageDirs);
}
/**
* If rolling upgrades are in progress then do not delete block files
* immediately. Instead we move the block files to an intermediate
@ -688,7 +704,8 @@ void doUpgrade(DataNode datanode, StorageDirectory sd, NamespaceInfo nsInfo)
if (DataNodeLayoutVersion.supports(
LayoutVersion.Feature.FEDERATION, layoutVersion)) {
// The VERSION file is already read in. Override the layoutVersion
// field and overwrite the file.
// field and overwrite the file. The upgrade work is handled by
// {@link BlockPoolSliceStorage#doUpgrade}
LOG.info("Updating layout version from " + layoutVersion + " to "
+ HdfsConstants.DATANODE_LAYOUT_VERSION + " for storage "
+ sd.getRoot());

11
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/FsDatasetSpi.java
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@ -443,6 +443,17 @@ public HdfsBlocksMetadata getHdfsBlocksMetadata(String bpid,
*/
public boolean trashEnabled(String bpid);
/**
* Create a marker file indicating that a rolling upgrade is in progress.
*/
public void setRollingUpgradeMarker(String bpid) throws IOException;
/**
* Delete the rolling upgrade marker file if it exists.
* @param bpid
*/
public void clearRollingUpgradeMarker(String bpid) throws IOException;
/**
* submit a sync_file_range request to AsyncDiskService
*/

10
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsDatasetImpl.java
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@ -2039,6 +2039,16 @@ public boolean trashEnabled(String bpid) {
return dataStorage.trashEnabled(bpid);
}
@Override
public void setRollingUpgradeMarker(String bpid) throws IOException {
dataStorage.setRollingUpgradeMarker(bpid);
}
@Override
public void clearRollingUpgradeMarker(String bpid) throws IOException {
dataStorage.clearRollingUpgradeMarker(bpid);
}
@Override
public RollingLogs createRollingLogs(String bpid, String prefix
) throws IOException {

38
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/DFSTestUtil.java
View File

@ -20,6 +20,7 @@
import com.google.common.base.Charsets;
import com.google.common.base.Joiner;
import com.google.common.base.Preconditions;
import com.google.common.base.Supplier;
import com.google.common.collect.Lists;
@ -56,6 +57,7 @@
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.StartupOption;
import org.apache.hadoop.hdfs.server.common.StorageInfo;
import org.apache.hadoop.hdfs.server.datanode.DataNode;
import org.apache.hadoop.hdfs.server.datanode.DataNodeLayoutVersion;
import org.apache.hadoop.hdfs.server.datanode.TestTransferRbw;
import org.apache.hadoop.hdfs.server.datanode.fsdataset.FsDatasetSpi;
import org.apache.hadoop.hdfs.server.namenode.FSNamesystem;
@ -77,6 +79,8 @@
import org.junit.Assume;
import java.io.*;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.net.*;
import java.nio.ByteBuffer;
import java.security.NoSuchAlgorithmException;
@ -1400,4 +1404,38 @@ public static DatanodeDescriptor getExpectedPrimaryNode(NameNode nn,
}
return expectedPrimary.getDatanodeDescriptor();
}
public static void addDataNodeLayoutVersion(final int lv, final String description)
throws NoSuchFieldException, IllegalAccessException {
Preconditions.checkState(lv < DataNodeLayoutVersion.CURRENT_LAYOUT_VERSION);
// Override {@link DataNodeLayoutVersion#CURRENT_LAYOUT_VERSION} via reflection.
Field modifiersField = Field.class.getDeclaredField("modifiers");
modifiersField.setAccessible(true);
Field field = DataNodeLayoutVersion.class.getField("CURRENT_LAYOUT_VERSION");
field.setAccessible(true);
modifiersField.setInt(field, field.getModifiers() & ~Modifier.FINAL);
field.setInt(null, lv);
// Override {@link HdfsConstants#DATANODE_LAYOUT_VERSION}
field = HdfsConstants.class.getField("DATANODE_LAYOUT_VERSION");
field.setAccessible(true);
modifiersField.setInt(field, field.getModifiers() & ~Modifier.FINAL);
field.setInt(null, lv);
// Inject the feature into the FEATURES map.
final LayoutVersion.FeatureInfo featureInfo =
new LayoutVersion.FeatureInfo(lv, lv + 1, description, false);
final LayoutVersion.LayoutFeature feature =
new LayoutVersion.LayoutFeature() {
@Override
public LayoutVersion.FeatureInfo getInfo() {
return featureInfo;
}
};
// Update the FEATURES map with the new layout version.
LayoutVersion.updateMap(DataNodeLayoutVersion.FEATURES,
new LayoutVersion.LayoutFeature[] { feature });
}
}

8
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/SimulatedFSDataset.java
View File

@ -1072,6 +1072,14 @@ public boolean trashEnabled(String bpid) {
return false;
}
@Override
public void setRollingUpgradeMarker(String bpid) {
}
@Override
public void clearRollingUpgradeMarker(String bpid) {
}
@Override
public void checkAndUpdate(String bpid, long blockId, File diskFile,
File diskMetaFile, FsVolumeSpi vol) {

205
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestDataNodeRollingUpgrade.java
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@ -19,6 +19,7 @@
package org.apache.hadoop.hdfs.server.datanode;
import static org.hamcrest.core.Is.is;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
@ -28,6 +29,8 @@
import java.io.File;
import java.io.IOException;
import java.util.Random;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
@ -47,6 +50,7 @@
import org.apache.hadoop.hdfs.protocol.HdfsConstants.SafeModeAction;
import org.apache.hadoop.hdfs.server.namenode.NameNode;
import org.apache.hadoop.hdfs.tools.DFSAdmin;
import org.apache.hadoop.test.GenericTestUtils;
import org.junit.Test;
/**
@ -64,7 +68,7 @@ public class TestDataNodeRollingUpgrade {
Configuration conf;
MiniDFSCluster cluster = null;
DistributedFileSystem fs = null;
DataNode dn = null;
DataNode dn0 = null;
NameNode nn = null;
String blockPoolId = null;
@ -76,8 +80,8 @@ private void startCluster() throws IOException {
fs = cluster.getFileSystem();
nn = cluster.getNameNode(0);
assertNotNull(nn);
dn = cluster.getDataNodes().get(0);
assertNotNull(dn);
dn0 = cluster.getDataNodes().get(0);
assertNotNull(dn0);
blockPoolId = cluster.getNameNode(0).getNamesystem().getBlockPoolId();
}
@ -88,7 +92,7 @@ private void shutdownCluster() {
}
fs = null;
nn = null;
dn = null;
dn0 = null;
blockPoolId = null;
}
@ -103,9 +107,10 @@ private void triggerHeartBeats() throws Exception {
private File getBlockForFile(Path path, boolean exists) throws IOException {
LocatedBlocks blocks = nn.getRpcServer().getBlockLocations(path.toString(),
0, Long.MAX_VALUE);
assertEquals(1, blocks.getLocatedBlocks().size());
assertEquals("The test helper functions assume that each file has a single block",
1, blocks.getLocatedBlocks().size());
ExtendedBlock block = blocks.getLocatedBlocks().get(0).getBlock();
BlockLocalPathInfo bInfo = dn.getFSDataset().getBlockLocalPathInfo(block);
BlockLocalPathInfo bInfo = dn0.getFSDataset().getBlockLocalPathInfo(block);
File blockFile = new File(bInfo.getBlockPath());
assertEquals(exists, blockFile.exists());
return blockFile;
@ -113,7 +118,7 @@ private File getBlockForFile(Path path, boolean exists) throws IOException {
private File getTrashFileForBlock(File blockFile, boolean exists) {
File trashFile = new File(
dn.getStorage().getTrashDirectoryForBlockFile(blockPoolId, blockFile));
dn0.getStorage().getTrashDirectoryForBlockFile(blockPoolId, blockFile));
assertEquals(exists, trashFile.exists());
return trashFile;
}
@ -135,11 +140,10 @@ private void deleteAndEnsureInTrash(Path pathToDelete,
assertFalse(blockFile.exists());
}
private void ensureTrashDisabled() {
private boolean isTrashRootPresent() {
// Trash is disabled; trash root does not exist
assertFalse(dn.getFSDataset().trashEnabled(blockPoolId));
BlockPoolSliceStorage bps = dn.getStorage().getBPStorage(blockPoolId);
assertFalse(bps.trashEnabled());
BlockPoolSliceStorage bps = dn0.getStorage().getBPStorage(blockPoolId);
return bps.trashEnabled();
}
/**
@ -149,17 +153,25 @@ private void ensureTrashRestored(File blockFile, File trashFile)
throws Exception {
assertTrue(blockFile.exists());
assertFalse(trashFile.exists());
ensureTrashDisabled();
assertFalse(isTrashRootPresent());
}
private boolean isBlockFileInPrevious(File blockFile) {
Pattern blockFilePattern = Pattern.compile("^(.*/current/.*/)(current)(/.*)$");
Matcher matcher = blockFilePattern.matcher(blockFile.toString());
String previousFileName = matcher.replaceFirst("$1" + "previous" + "$3");
return ((new File(previousFileName)).exists());
}
private void startRollingUpgrade() throws Exception {
LOG.info("Starting rolling upgrade");
fs.setSafeMode(SafeModeAction.SAFEMODE_ENTER);
final DFSAdmin dfsadmin = new DFSAdmin(conf);
TestRollingUpgrade.runCmd(dfsadmin, true, "-rollingUpgrade", "prepare");
triggerHeartBeats();
// Ensure datanode rolling upgrade is started
assertTrue(dn.getFSDataset().trashEnabled(blockPoolId));
assertTrue(dn0.getFSDataset().trashEnabled(blockPoolId));
}
private void finalizeRollingUpgrade() throws Exception {
@ -169,8 +181,8 @@ private void finalizeRollingUpgrade() throws Exception {
triggerHeartBeats();
// Ensure datanode rolling upgrade is started
assertFalse(dn.getFSDataset().trashEnabled(blockPoolId));
BlockPoolSliceStorage bps = dn.getStorage().getBPStorage(blockPoolId);
assertFalse(dn0.getFSDataset().trashEnabled(blockPoolId));
BlockPoolSliceStorage bps = dn0.getStorage().getBPStorage(blockPoolId);
assertFalse(bps.trashEnabled());
}
@ -179,13 +191,15 @@ private void rollbackRollingUpgrade() throws Exception {
// Restart the namenode with rolling upgrade rollback
LOG.info("Starting rollback of the rolling upgrade");
MiniDFSCluster.DataNodeProperties dnprop = cluster.stopDataNode(0);
dnprop.setDnArgs("-rollback");
cluster.shutdownNameNodes();
cluster.restartNameNode("-rollingupgrade", "rollback");
cluster.restartDataNode(dnprop);
cluster.waitActive();
nn = cluster.getNameNode(0);
dn = cluster.getDataNodes().get(0);
dn0 = cluster.getDataNodes().get(0);
triggerHeartBeats();
LOG.info("The cluster is active after rollback");
}
@Test (timeout=600000)
@ -194,12 +208,11 @@ public void testDatanodeRollingUpgradeWithFinalize() throws Exception {
startCluster();
// Create files in DFS.
Path testFile1 = new Path("/TestDataNodeRollingUpgrade1.dat");
Path testFile2 = new Path("/TestDataNodeRollingUpgrade2.dat");
Path testFile1 = new Path("/" + GenericTestUtils.getMethodName() + ".01.dat");
Path testFile2 = new Path("/" + GenericTestUtils.getMethodName() + ".02.dat");
DFSTestUtil.createFile(fs, testFile1, FILE_SIZE, REPL_FACTOR, SEED);
DFSTestUtil.createFile(fs, testFile2, FILE_SIZE, REPL_FACTOR, SEED);
fs.setSafeMode(SafeModeAction.SAFEMODE_ENTER);
startRollingUpgrade();
File blockFile = getBlockForFile(testFile2, true);
File trashFile = getTrashFileForBlock(blockFile, false);
@ -207,7 +220,7 @@ public void testDatanodeRollingUpgradeWithFinalize() throws Exception {
finalizeRollingUpgrade();
// Ensure that delete file testFile2 stays deleted after finalize
ensureTrashDisabled();
assertFalse(isTrashRootPresent());
assert(!fs.exists(testFile2));
assert(fs.exists(testFile1));
@ -222,11 +235,10 @@ public void testDatanodeRollingUpgradeWithRollback() throws Exception {
startCluster();
// Create files in DFS.
Path testFile1 = new Path("/TestDataNodeRollingUpgrade1.dat");
Path testFile1 = new Path("/" + GenericTestUtils.getMethodName() + ".01.dat");
DFSTestUtil.createFile(fs, testFile1, FILE_SIZE, REPL_FACTOR, SEED);
String fileContents1 = DFSTestUtil.readFile(fs, testFile1);
fs.setSafeMode(SafeModeAction.SAFEMODE_ENTER);
startRollingUpgrade();
File blockFile = getBlockForFile(testFile1, true);
@ -255,9 +267,9 @@ public void testDatanodePeersXceiver() throws Exception {
startCluster();
// Create files in DFS.
String testFile1 = "/TestDataNodeXceiver1.dat";
String testFile2 = "/TestDataNodeXceiver2.dat";
String testFile3 = "/TestDataNodeXceiver3.dat";
String testFile1 = "/" + GenericTestUtils.getMethodName() + ".01.dat";
String testFile2 = "/" + GenericTestUtils.getMethodName() + ".02.dat";
String testFile3 = "/" + GenericTestUtils.getMethodName() + ".03.dat";
DFSClient client1 = new DFSClient(NameNode.getAddress(conf), conf);
DFSClient client2 = new DFSClient(NameNode.getAddress(conf), conf);
@ -277,12 +289,12 @@ public void testDatanodePeersXceiver() throws Exception {
s3.write(toWrite, 0, 1024*1024*8);
s3.flush();
assertTrue(dn.getXferServer().getNumPeersXceiver() == dn.getXferServer()
assertTrue(dn0.getXferServer().getNumPeersXceiver() == dn0.getXferServer()
.getNumPeersXceiver());
s1.close();
s2.close();
s3.close();
assertTrue(dn.getXferServer().getNumPeersXceiver() == dn.getXferServer()
assertTrue(dn0.getXferServer().getNumPeersXceiver() == dn0.getXferServer()
.getNumPeersXceiver());
client1.close();
client2.close();
@ -291,4 +303,143 @@ public void testDatanodePeersXceiver() throws Exception {
shutdownCluster();
}
}
/**
* Support for layout version change with rolling upgrade was
* added by HDFS-6800 and HDFS-6981.
*/
@Test(timeout=300000)
public void testWithLayoutChangeAndFinalize() throws Exception {
final long seed = 0x600DF00D;
try {
startCluster();
Path[] paths = new Path[3];
File[] blockFiles = new File[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], BLOCK_SIZE, (short) 2, seed);
}
startRollingUpgrade();
// Delete the first file. The DN will save its block files in trash.
blockFiles[0] = getBlockForFile(paths[0], true);
File 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.CURRENT_LAYOUT_VERSION - 1,
"Test Layout for TestDataNodeRollingUpgrade");
LOG.info("Restarting the DataNode");
cluster.restartDataNode(dnprop, true);
cluster.waitActive();
dn0 = cluster.getDataNodes().get(0);
LOG.info("The DN has been restarted");
assertFalse(trashFile0.exists());
assertFalse(dn0.getStorage().getBPStorage(blockPoolId).isTrashAllowed(blockFiles[0]));
// Ensure that the block file for the first file was moved from 'trash' to 'previous'.
assertTrue(isBlockFileInPrevious(blockFiles[0]));
assertFalse(isTrashRootPresent());
// Delete the second file. Ensure that its block file is in previous.
blockFiles[1] = getBlockForFile(paths[1], true);
fs.delete(paths[1], false);
assertTrue(isBlockFileInPrevious(blockFiles[1]));
assertFalse(isTrashRootPresent());
// Rollback and ensure that neither block file exists in trash or previous.
finalizeRollingUpgrade();
assertFalse(isTrashRootPresent());
assertFalse(isBlockFileInPrevious(blockFiles[0]));
assertFalse(isBlockFileInPrevious(blockFiles[1]));
} finally {
shutdownCluster();
}
}
/**
* Support for layout version change with rolling upgrade was
* added by HDFS-6800 and HDFS-6981.
*/
@Test(timeout=300000)
public void testWithLayoutChangeAndRollback() throws Exception {
final long seed = 0x600DF00D;
try {
startCluster();
Path[] paths = new Path[3];
File[] blockFiles = new File[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], BLOCK_SIZE, (short) 1, seed);
}
startRollingUpgrade();
// Delete the first file. The DN will save its block files in trash.
blockFiles[0] = getBlockForFile(paths[0], true);
File 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.CURRENT_LAYOUT_VERSION - 1,
"Test Layout for TestDataNodeRollingUpgrade");
LOG.info("Restarting the DataNode");
cluster.restartDataNode(dnprop, true);
cluster.waitActive();
dn0 = cluster.getDataNodes().get(0);
LOG.info("The DN has been restarted");
assertFalse(trashFile0.exists());
assertFalse(dn0.getStorage().getBPStorage(blockPoolId).isTrashAllowed(blockFiles[0]));
// Ensure that the block file for the first file was moved from 'trash' to 'previous'.
assertTrue(isBlockFileInPrevious(blockFiles[0]));
assertFalse(isTrashRootPresent());
// Delete the second file. Ensure that its block file is in previous.
blockFiles[1] = getBlockForFile(paths[1], true);
fs.delete(paths[1], false);
assertTrue(isBlockFileInPrevious(blockFiles[1]));
assertFalse(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], BLOCK_SIZE, (short) 1, seed);
blockFiles[2] = getBlockForFile(paths[2], true);
fs.delete(paths[2], false);
assertFalse(isBlockFileInPrevious(blockFiles[2]));
assertFalse(isTrashRootPresent());
// Rollback and ensure that the first two file contents were restored.
rollbackRollingUpgrade();
for (int i = 0; i < 2; ++i) {
byte[] actual = DFSTestUtil.readFileBuffer(fs, paths[i]);
byte[] calculated = DFSTestUtil.calculateFileContentsFromSeed(seed, BLOCK_SIZE);
assertArrayEquals(actual, calculated);
}
// And none of the block files must be in previous or trash.
assertFalse(isTrashRootPresent());
for (int i = 0; i < 3; ++i) {
assertFalse(isBlockFileInPrevious(blockFiles[i]));
}
} finally {
shutdownCluster();
}
}
}