private static DatanodeInfo chooseDatanode(
final NameNode namenode, final String path, final HttpOpParam.Op op, final long openOffset)
throws IOException {
if (op == GetOpParam.Op.OPEN
|| op == GetOpParam.Op.GETFILECHECKSUM
|| op == PostOpParam.Op.APPEND) {
final HdfsFileStatus status = namenode.getFileInfo(path);
final long len = status.getLen();
if (op == GetOpParam.Op.OPEN && (openOffset < 0L || openOffset >= len)) {
throw new IOException(
"Offset="
+ openOffset
+ " out of the range [0, "
+ len
+ "); "
+ op
+ ", path="
+ path);
}
if (len > 0) {
final long offset = op == GetOpParam.Op.OPEN ? openOffset : len - 1;
final LocatedBlocks locations = namenode.getBlockLocations(path, offset, 1);
final int count = locations.locatedBlockCount();
if (count > 0) {
return JspHelper.bestNode(locations.get(0));
}
}
}
return namenode.getNamesystem().getRandomDatanode();
}
@Override // NamenodeProtocol
public NamenodeCommand startCheckpoint(NamenodeRegistration registration) throws IOException {
verifyRequest(registration);
if (!nn.isRole(NamenodeRole.NAMENODE))
throw new IOException("Only an ACTIVE node can invoke startCheckpoint.");
return namesystem.startCheckpoint(registration, nn.setRegistration());
}
/**
* Generate a dummy namenode proxy instance that utilizes our hacked {@link
* LossyRetryInvocationHandler}. Proxy instance generated using this method will proactively drop
* RPC responses. Currently this method only support HA setup. null will be returned if the given
* configuration is not for HA.
*
* @param config the configuration containing the required IPC properties, client failover
* configurations, etc.
* @param nameNodeUri the URI pointing either to a specific NameNode or to a logical nameservice.
* @param xface the IPC interface which should be created
* @param numResponseToDrop The number of responses to drop for each RPC call
* @param fallbackToSimpleAuth set to true or false during calls to indicate if a secure client
* falls back to simple auth
* @return an object containing both the proxy and the associated delegation token service it
* corresponds to. Will return null of the given configuration does not support HA.
* @throws IOException if there is an error creating the proxy
*/
@SuppressWarnings("unchecked")
public static <T> ProxyAndInfo<T> createProxyWithLossyRetryHandler(
Configuration config,
URI nameNodeUri,
Class<T> xface,
int numResponseToDrop,
AtomicBoolean fallbackToSimpleAuth)
throws IOException {
Preconditions.checkArgument(numResponseToDrop > 0);
AbstractNNFailoverProxyProvider<T> failoverProxyProvider =
createFailoverProxyProvider(config, nameNodeUri, xface, true, fallbackToSimpleAuth);
if (failoverProxyProvider != null) { // HA case
int delay =
config.getInt(
HdfsClientConfigKeys.Failover.SLEEPTIME_BASE_KEY,
HdfsClientConfigKeys.Failover.SLEEPTIME_BASE_DEFAULT);
int maxCap =
config.getInt(
HdfsClientConfigKeys.Failover.SLEEPTIME_MAX_KEY,
HdfsClientConfigKeys.Failover.SLEEPTIME_MAX_DEFAULT);
int maxFailoverAttempts =
config.getInt(
HdfsClientConfigKeys.Failover.MAX_ATTEMPTS_KEY,
HdfsClientConfigKeys.Failover.MAX_ATTEMPTS_DEFAULT);
int maxRetryAttempts =
config.getInt(
HdfsClientConfigKeys.Retry.MAX_ATTEMPTS_KEY,
HdfsClientConfigKeys.Retry.MAX_ATTEMPTS_DEFAULT);
InvocationHandler dummyHandler =
new LossyRetryInvocationHandler<T>(
numResponseToDrop,
failoverProxyProvider,
RetryPolicies.failoverOnNetworkException(
RetryPolicies.TRY_ONCE_THEN_FAIL,
maxFailoverAttempts,
Math.max(numResponseToDrop + 1, maxRetryAttempts),
delay,
maxCap));
T proxy =
(T)
Proxy.newProxyInstance(
failoverProxyProvider.getInterface().getClassLoader(),
new Class[] {xface},
dummyHandler);
Text dtService;
if (failoverProxyProvider.useLogicalURI()) {
dtService =
HAUtilClient.buildTokenServiceForLogicalUri(nameNodeUri, HdfsConstants.HDFS_URI_SCHEME);
} else {
dtService = SecurityUtil.buildTokenService(NameNode.getAddress(nameNodeUri));
}
return new ProxyAndInfo<T>(proxy, dtService, NameNode.getAddress(nameNodeUri));
} else {
LOG.warn(
"Currently creating proxy using " + "LossyRetryInvocationHandler requires NN HA setup");
return null;
}
}
@Test
public void testNameNode() throws IOException {
Configuration conf = MyConf.getConfiguration();
new File("D:\\home\\hdfs\\tmp\\dfs\\name").mkdirs();
NameNode namenode = new NameNode(conf);
System.out.println(namenode.getFsImageName().getName());
}
static {
try {
FileSystem.setDefaultUri(CONF, "hdfs://localhost:0");
CONF.set("dfs.http.address", "0.0.0.0:0");
NameNode.format(CONF);
namenode = new NameNode(CONF);
} catch (IOException e) {
e.printStackTrace();
throw (RuntimeException) new RuntimeException().initCause(e);
}
FSNamesystem fsNamesystem = namenode.getNamesystem();
replicator = fsNamesystem.blockManager.replicator;
cluster = fsNamesystem.clusterMap;
// construct network topology
for (int i = 0; i < NUM_OF_DATANODES; i++) {
cluster.add(dataNodes[i]);
}
for (int i = 0; i < NUM_OF_DATANODES; i++) {
dataNodes[i].updateHeartbeat(
2 * FSConstants.MIN_BLOCKS_FOR_WRITE * BLOCK_SIZE,
0L,
2 * FSConstants.MIN_BLOCKS_FOR_WRITE * BLOCK_SIZE,
0);
}
}
/** Regression test for HDFS-2934. */
@Test
public void testSomeConfsNNSpecificSomeNSSpecific() {
final HdfsConfiguration conf = new HdfsConfiguration();
String key = DFSConfigKeys.DFS_NAMENODE_SHARED_EDITS_DIR_KEY;
conf.set(key, "global-default");
conf.set(key + ".ns1", "ns1-override");
conf.set(key + ".ns1.nn1", "nn1-override");
// A namenode in another nameservice should get the global default.
Configuration newConf = new Configuration(conf);
NameNode.initializeGenericKeys(newConf, "ns2", "nn1");
assertEquals("global-default", newConf.get(key));
// A namenode in another non-HA nameservice should get global default.
newConf = new Configuration(conf);
NameNode.initializeGenericKeys(newConf, "ns2", null);
assertEquals("global-default", newConf.get(key));
// A namenode in the same nameservice should get the ns setting
newConf = new Configuration(conf);
NameNode.initializeGenericKeys(newConf, "ns1", "nn2");
assertEquals("ns1-override", newConf.get(key));
// The nn with the nn-specific setting should get its own override
newConf = new Configuration(conf);
NameNode.initializeGenericKeys(newConf, "ns1", "nn1");
assertEquals("nn1-override", newConf.get(key));
}
/**
* The function will verify the token with NameNode if available and will create a
* UserGroupInformation.
*
* <p>Code in this function is copied from JspHelper.getTokenUGI
*
* @param identifier Delegation token identifier
* @param password Delegation token password
* @param kind the kind of token
* @param service the service for this token
* @param servletContext Jetty servlet context which contains the NN address
* @throws SecurityException Thrown when authentication fails
*/
private static void verifyToken(
byte[] identifier, byte[] password, Text kind, Text service, ServletContext servletContext) {
try {
Token<DelegationTokenIdentifier> token =
new Token<DelegationTokenIdentifier>(identifier, password, kind, service);
ByteArrayInputStream buf = new ByteArrayInputStream(token.getIdentifier());
DataInputStream in = new DataInputStream(buf);
DelegationTokenIdentifier id = new DelegationTokenIdentifier();
id.readFields(in);
final NameNode nn = NameNodeHttpServer.getNameNodeFromContext(servletContext);
if (nn != null) {
nn.getNamesystem().verifyToken(id, token.getPassword());
}
UserGroupInformation userGroupInformation = id.getUser();
userGroupInformation.addToken(token);
LOG.debug(
"user "
+ userGroupInformation.getUserName()
+ " ("
+ userGroupInformation.getShortUserName()
+ ") authenticated");
// re-login if necessary
userGroupInformation.checkTGTAndReloginFromKeytab();
} catch (IOException e) {
throw new SecurityException("Failed to verify delegation token " + e, e);
}
}
/**
* Regression test for HDFS-2742. The issue in this bug was: - DN does a block report while file
* is open. This BR contains the block in RBW state. - Standby queues the RBW state in
* PendingDatanodeMessages - Standby processes edit logs during failover. Before fixing this bug,
* it was mistakenly applying the RBW reported state after the block had been completed, causing
* the block to get marked corrupt. Instead, we should now be applying the RBW message on OP_ADD,
* and then the FINALIZED message on OP_CLOSE.
*/
@Test
public void testBlockReportsWhileFileBeingWritten() throws Exception {
FSDataOutputStream out = fs.create(TEST_FILE_PATH);
try {
AppendTestUtil.write(out, 0, 10);
out.hflush();
// Block report will include the RBW replica, but will be
// queued on the StandbyNode.
cluster.triggerBlockReports();
} finally {
IOUtils.closeStream(out);
}
cluster.transitionToStandby(0);
cluster.transitionToActive(1);
// Verify that no replicas are marked corrupt, and that the
// file is readable from the failed-over standby.
BlockManagerTestUtil.updateState(nn1.getNamesystem().getBlockManager());
BlockManagerTestUtil.updateState(nn2.getNamesystem().getBlockManager());
assertEquals(0, nn1.getNamesystem().getCorruptReplicaBlocks());
assertEquals(0, nn2.getNamesystem().getCorruptReplicaBlocks());
DFSTestUtil.readFile(fs, TEST_FILE_PATH);
}
private void checkForCorruptOpenFiles(FileStatus file, List<FileStatus> corruptFiles)
throws IOException {
String filePath = file.getPath().toUri().getPath();
if (file.isDir()) {
for (FileStatus fileStatus : nn.namesystem.dir.getListing(filePath)) {
checkForCorruptOpenFiles(fileStatus, corruptFiles);
}
} else {
LeaseManager.Lease lease = nn.getNamesystem().leaseManager.getLeaseByPath(filePath);
// Condition:
// 1. lease has expired hard limit
// 2. the file is open for write
// 3. the last block has 0 locations
if (lease != null && lease.expiredHardLimit()) {
LocatedBlocks blocks = nn.getNamesystem().getBlockLocations(filePath, 0, file.getLen());
List<LocatedBlock> locatedBlockList = blocks.getLocatedBlocks();
LocatedBlock lastBlock = locatedBlockList.get(locatedBlockList.size() - 1);
if (blocks.isUnderConstruction() && lastBlock.getLocations().length == 0) {
corruptFiles.add(file);
}
}
}
}
void register() throws IOException {
// get versions from the namenode
nsInfo = nameNode.versionRequest();
dnRegistration.setStorageInfo(new DataStorage(nsInfo, ""));
DataNode.setNewStorageID(dnRegistration);
// register datanode
dnRegistration = nameNode.register(dnRegistration);
}
static DatanodeInfo chooseDatanode(
final NameNode namenode,
final String path,
final HttpOpParam.Op op,
final long openOffset,
final long blocksize,
Configuration conf)
throws IOException {
final BlockManager bm = namenode.getNamesystem().getBlockManager();
if (op == PutOpParam.Op.CREATE) {
// choose a datanode near to client
final DatanodeDescriptor clientNode =
bm.getDatanodeManager().getDatanodeByHost(getRemoteAddress());
if (clientNode != null) {
final DatanodeDescriptor[] datanodes =
bm.getBlockPlacementPolicy().chooseTarget(path, 1, clientNode, null, blocksize);
if (datanodes.length > 0) {
return datanodes[0];
}
}
} else if (op == GetOpParam.Op.OPEN
|| op == GetOpParam.Op.GETFILECHECKSUM
|| op == PostOpParam.Op.APPEND) {
// choose a datanode containing a replica
final NamenodeProtocols np = namenode.getRpcServer();
final HdfsFileStatus status = np.getFileInfo(path);
if (status == null) {
throw new FileNotFoundException("File " + path + " not found.");
}
final long len = status.getLen();
if (op == GetOpParam.Op.OPEN) {
if (openOffset < 0L || (openOffset >= len && len > 0)) {
throw new IOException(
"Offset="
+ openOffset
+ " out of the range [0, "
+ len
+ "); "
+ op
+ ", path="
+ path);
}
}
if (len > 0) {
final long offset = op == GetOpParam.Op.OPEN ? openOffset : len - 1;
final LocatedBlocks locations = np.getBlockLocations(path, offset, 1);
final int count = locations.locatedBlockCount();
if (count > 0) {
return JspHelper.bestNode(locations.get(0).getLocations(), false, conf);
}
}
}
return (DatanodeDescriptor)
bm.getDatanodeManager().getNetworkTopology().chooseRandom(NodeBase.ROOT);
}
private void doMetasave(NameNode nn2) {
nn2.getNamesystem().writeLock();
try {
PrintWriter pw = new PrintWriter(System.err);
nn2.getNamesystem().getBlockManager().metaSave(pw);
pw.flush();
} finally {
nn2.getNamesystem().writeUnlock();
}
}
/**
* testing that APPEND operation can handle token expiration when re-establishing pipeline is
* needed
*/
@Test
public void testAppend() throws Exception {
MiniDFSCluster cluster = null;
int numDataNodes = 2;
Configuration conf = getConf(numDataNodes);
try {
cluster = new MiniDFSCluster.Builder(conf).numDataNodes(numDataNodes).build();
cluster.waitActive();
assertEquals(numDataNodes, cluster.getDataNodes().size());
final NameNode nn = cluster.getNameNode();
final BlockManager bm = nn.getNamesystem().getBlockManager();
final BlockTokenSecretManager sm = bm.getBlockTokenSecretManager();
// set a short token lifetime (1 second)
SecurityTestUtil.setBlockTokenLifetime(sm, 1000L);
Path fileToAppend = new Path(FILE_TO_APPEND);
FileSystem fs = cluster.getFileSystem();
byte[] expected = generateBytes(FILE_SIZE);
// write a one-byte file
FSDataOutputStream stm = writeFile(fs, fileToAppend, (short) numDataNodes, BLOCK_SIZE);
stm.write(expected, 0, 1);
stm.close();
// open the file again for append
stm = fs.append(fileToAppend);
int mid = expected.length - 1;
stm.write(expected, 1, mid - 1);
stm.hflush();
/*
* wait till token used in stm expires
*/
Token<BlockTokenIdentifier> token = DFSTestUtil.getBlockToken(stm);
while (!SecurityTestUtil.isBlockTokenExpired(token)) {
try {
Thread.sleep(10);
} catch (InterruptedException ignored) {
}
}
// remove a datanode to force re-establishing pipeline
cluster.stopDataNode(0);
// append the rest of the file
stm.write(expected, mid, expected.length - mid);
stm.close();
// check if append is successful
FSDataInputStream in5 = fs.open(fileToAppend);
assertTrue(checkFile1(in5, expected));
} finally {
if (cluster != null) {
cluster.shutdown();
}
}
}
/**
* Another regression test for HDFS-2742. This tests the following sequence: - DN does a block
* report while file is open. This BR contains the block in RBW state. - The block report is
* delayed in reaching the standby. - The file is closed. - The standby processes the OP_ADD and
* OP_CLOSE operations before the RBW block report arrives. - The standby should not mark the
* block as corrupt.
*/
@Test
public void testRBWReportArrivesAfterEdits() throws Exception {
final CountDownLatch brFinished = new CountDownLatch(1);
DelayAnswer delayer =
new GenericTestUtils.DelayAnswer(LOG) {
@Override
protected Object passThrough(InvocationOnMock invocation) throws Throwable {
try {
return super.passThrough(invocation);
} finally {
// inform the test that our block report went through.
brFinished.countDown();
}
}
};
FSDataOutputStream out = fs.create(TEST_FILE_PATH);
try {
AppendTestUtil.write(out, 0, 10);
out.hflush();
DataNode dn = cluster.getDataNodes().get(0);
DatanodeProtocolClientSideTranslatorPB spy = DataNodeTestUtils.spyOnBposToNN(dn, nn2);
Mockito.doAnswer(delayer)
.when(spy)
.blockReport(
Mockito.<DatanodeRegistration>anyObject(),
Mockito.anyString(),
Mockito.<StorageBlockReport[]>anyObject());
dn.scheduleAllBlockReport(0);
delayer.waitForCall();
} finally {
IOUtils.closeStream(out);
}
cluster.transitionToStandby(0);
cluster.transitionToActive(1);
delayer.proceed();
brFinished.await();
// Verify that no replicas are marked corrupt, and that the
// file is readable from the failed-over standby.
BlockManagerTestUtil.updateState(nn1.getNamesystem().getBlockManager());
BlockManagerTestUtil.updateState(nn2.getNamesystem().getBlockManager());
assertEquals(0, nn1.getNamesystem().getCorruptReplicaBlocks());
assertEquals(0, nn2.getNamesystem().getCorruptReplicaBlocks());
DFSTestUtil.readFile(fs, TEST_FILE_PATH);
}
/**
* Test that, when a block is re-opened for append, the related datanode messages are correctly
* queued by the SBN because they have future states and genstamps.
*/
@Test
public void testQueueingWithAppend() throws Exception {
int numQueued = 0;
int numDN = cluster.getDataNodes().size();
FSDataOutputStream out = fs.create(TEST_FILE_PATH);
try {
AppendTestUtil.write(out, 0, 10);
out.hflush();
// Opening the file will report RBW replicas, but will be
// queued on the StandbyNode.
numQueued += numDN; // RBW messages
} finally {
IOUtils.closeStream(out);
numQueued += numDN; // blockReceived messages
}
cluster.triggerBlockReports();
numQueued += numDN;
try {
out = fs.append(TEST_FILE_PATH);
AppendTestUtil.write(out, 10, 10);
// RBW replicas once it's opened for append
numQueued += numDN;
} finally {
IOUtils.closeStream(out);
numQueued += numDN; // blockReceived
}
cluster.triggerBlockReports();
numQueued += numDN;
assertEquals(
numQueued, cluster.getNameNode(1).getNamesystem().getPendingDataNodeMessageCount());
cluster.transitionToStandby(0);
cluster.transitionToActive(1);
// Verify that no replicas are marked corrupt, and that the
// file is readable from the failed-over standby.
BlockManagerTestUtil.updateState(nn1.getNamesystem().getBlockManager());
BlockManagerTestUtil.updateState(nn2.getNamesystem().getBlockManager());
assertEquals(0, nn1.getNamesystem().getCorruptReplicaBlocks());
assertEquals(0, nn2.getNamesystem().getCorruptReplicaBlocks());
AppendTestUtil.check(fs, TEST_FILE_PATH, 20);
}
/** Test that the {@link PlacementMonitor.BlockAndDatanodeResolver} works correctly. */
@Test
public void testBlockAndDatanodeResolver() throws Exception {
setupCluster();
try {
Path src = new Path("/dir/file");
Path parity = new Path("/raid/dir/file");
DFSTestUtil.createFile(fs, src, 20, (short) 2, 0L);
DFSTestUtil.createFile(fs, parity, 11, (short) 2, 0L);
DFSTestUtil.waitReplication(fs, src, (short) 2);
DFSTestUtil.waitReplication(fs, parity, (short) 2);
LocatedBlocks srcLbs, parityLbs;
List<BlockInfo> srcInfos, parityInfos;
srcLbs = namenode.getBlockLocations(src.toString(), 4, 10);
srcInfos = placementMonitor.getBlockInfos(fs, src, 4, 10);
parityLbs = namenode.getBlockLocations(parity.toString(), 3, 7);
parityInfos = placementMonitor.getBlockInfos(fs, parity, 3, 7);
Assert.assertEquals(10, srcLbs.getLocatedBlocks().size());
Assert.assertEquals(7, parityLbs.getLocatedBlocks().size());
Assert.assertEquals(10, srcInfos.size());
Assert.assertEquals(7, parityInfos.size());
BlockAndDatanodeResolver resolver = new BlockAndDatanodeResolver(src, fs, parity, fs);
for (int i = 0; i < srcInfos.size(); ++i) {
LocatedBlock lb = resolver.getLocatedBlock(srcInfos.get(i));
Assert.assertEquals(srcLbs.get(i).getBlock(), lb.getBlock());
for (String nodeName : srcInfos.get(i).getNames()) {
DatanodeInfo node = resolver.getDatanodeInfo(nodeName);
Assert.assertEquals(node.getName(), nodeName);
}
}
for (int i = 0; i < parityInfos.size(); ++i) {
LocatedBlock lb = resolver.getLocatedBlock(parityInfos.get(i));
Assert.assertEquals(parityLbs.get(i).getBlock(), lb.getBlock());
for (String nodeName : parityInfos.get(i).getNames()) {
DatanodeInfo node = resolver.getDatanodeInfo(nodeName);
Assert.assertEquals(node.getName(), nodeName);
}
}
} finally {
if (cluster != null) {
cluster.shutdown();
}
if (placementMonitor != null) {
placementMonitor.stop();
}
}
}
/**
* Check files on DFS, starting from the indicated path.
*
* @throws Exception
*/
public void fsck() throws IOException {
NameNode.getNameNodeMetrics().numFsckOperations.inc();
InjectionHandler.processEvent(InjectionEvent.NAMENODE_FSCK_START);
try {
FileStatus[] files = nn.namesystem.dir.getListing(path);
FsckResult res = new FsckResult();
if (!this.showFiles && !this.showBlocks && !this.showLocations && !this.showRacks) {
res.totalRacks = nn.getNetworkTopology().getNumOfRacks();
res.totalDatanodes = nn.namesystem.getNumberOfDatanodes(DatanodeReportType.LIVE);
}
res.setReplication((short) conf.getInt("dfs.replication", 3));
if (files != null) {
if (showCorruptFileBlocks && showOpenFiles) {
listCorruptOpenFiles();
return;
}
if (showCorruptFileBlocks) {
listCorruptFileBlocks();
return;
}
for (int i = 0; i < files.length; i++) {
check(files[i], res);
}
out.println(res);
// DFSck client scans for the string HEALTHY/CORRUPT to check the status
// of file system and return appropriate code. Changing the output
// string might break testcases.
if (res.isHealthy()) {
out.print("\n\nThe filesystem under path '" + path + "' " + HEALTHY_STATUS);
} else {
out.print("\n\nThe filesystem under path '" + path + "' " + CORRUPT_STATUS);
}
} else {
out.print("\n\nPath '" + path + "' " + NONEXISTENT_STATUS);
}
} catch (Throwable e) {
String errMsg = "Fsck on path '" + path + "' " + FAILURE_STATUS;
LOG.warn(errMsg, e);
out.println(e.getMessage());
out.print("\n\n" + errMsg);
} finally {
out.close();
}
}
/**
* when formating a namenode - we must provide clusterid.
*
* @param conf
* @throws IOException
*/
public static void formatNameNode(Configuration conf) throws IOException {
String clusterId = StartupOption.FORMAT.getClusterId();
if (clusterId == null || clusterId.isEmpty())
StartupOption.FORMAT.setClusterId("testClusterID");
NameNode.format(conf);
}
/**
* Test to ensure nameservice specific keys in the configuration are copied to generic keys when
* the namenode starts.
*/
@Test
public void testConfModificationFederationAndHa() {
final HdfsConfiguration conf = new HdfsConfiguration();
String nsId = "ns1";
String nnId = "nn1";
conf.set(DFS_NAMESERVICES, nsId);
conf.set(DFS_NAMESERVICE_ID, nsId);
conf.set(DFS_HA_NAMENODES_KEY_PREFIX + "." + nsId, nnId);
// Set the nameservice specific keys with nameserviceId in the config key
for (String key : NameNode.NAMENODE_SPECIFIC_KEYS) {
// Note: value is same as the key
conf.set(DFSUtil.addKeySuffixes(key, nsId, nnId), key);
}
// Initialize generic keys from specific keys
NameNode.initializeGenericKeys(conf, nsId, nnId);
// Retrieve the keys without nameserviceId and Ensure generic keys are set
// to the correct value
for (String key : NameNode.NAMENODE_SPECIFIC_KEYS) {
assertEquals(key, conf.get(key));
}
}
/** Verify name-node port usage. */
public void testNameNodePorts() throws Exception {
NameNode nn = null;
try {
nn = startNameNode();
// start another namenode on the same port
Configuration conf2 = new Configuration(config);
conf2.set("dfs.name.dir", new File(hdfsDir, "name2").getPath());
NameNode.format(conf2);
boolean started = canStartNameNode(conf2);
assertFalse(started); // should fail
// start on a different main port
FileSystem.setDefaultUri(conf2, "hdfs://" + NAME_NODE_HOST + "0");
started = canStartNameNode(conf2);
assertFalse(started); // should fail again
// reset conf2 since NameNode modifies it
FileSystem.setDefaultUri(conf2, "hdfs://" + NAME_NODE_HOST + "0");
// different http port
conf2.set("dfs.http.address", NAME_NODE_HTTP_HOST + "0");
started = canStartNameNode(conf2);
assertTrue(started); // should start now
} finally {
stopNameNode(nn);
}
}
/** Start the name-node. */
public NameNode startNameNode() throws IOException {
String dataDir = System.getProperty("test.build.data");
hdfsDir = new File(dataDir, "dfs");
if (hdfsDir.exists() && !FileUtil.fullyDelete(hdfsDir)) {
throw new IOException("Could not delete hdfs directory '" + hdfsDir + "'");
}
config = new Configuration();
config.set("dfs.name.dir", new File(hdfsDir, "name1").getPath());
FileSystem.setDefaultUri(config, "hdfs://" + NAME_NODE_HOST + "0");
config.set("dfs.http.address", NAME_NODE_HTTP_HOST + "0");
NameNode.format(config);
String[] args = new String[] {};
// NameNode will modify config with the ports it bound to
return NameNode.createNameNode(args, config);
}
/**
* @return true if safemode is not running, or if safemode has already initialized the replication
* queues
*/
public static boolean safeModeInitializedReplQueues(NameNode nn) {
SafeModeInfo smi = nn.getNamesystem().getSafeModeInfoForTests();
if (smi == null) {
return true;
}
return smi.initializedReplQueues;
}
/** @return the number of blocks marked safe by safemode, or -1 if safemode is not running. */
public static int getSafeModeSafeBlocks(NameNode nn) throws IOException {
SafeModeInfo smi = nn.getNamesystem().getSafeModeInfoForTests();
if (smi == null) {
return -1;
}
return smi.blockSafe();
}
/** Initialize SecondaryNameNode. */
private void initialize(Configuration conf) throws IOException {
// initiate Java VM metrics
JvmMetrics.init("SecondaryNameNode", conf.get("session.id"));
// Create connection to the namenode.
shouldRun = true;
nameNodeAddr = NameNode.getAddress(conf);
this.conf = conf;
this.namenode =
(NamenodeProtocol)
RPC.waitForProxy(
NamenodeProtocol.class, NamenodeProtocol.versionID, nameNodeAddr, conf);
// initialize checkpoint directories
fsName = getInfoServer();
checkpointDirs = FSImage.getCheckpointDirs(conf, "/tmp/hadoop/dfs/namesecondary");
checkpointEditsDirs = FSImage.getCheckpointEditsDirs(conf, "/tmp/hadoop/dfs/namesecondary");
checkpointImage = new CheckpointStorage(conf);
checkpointImage.recoverCreate(checkpointDirs, checkpointEditsDirs);
// Initialize other scheduling parameters from the configuration
checkpointPeriod = conf.getLong("fs.checkpoint.period", 3600);
checkpointSize = conf.getLong("fs.checkpoint.size", 4194304);
// initialize the webserver for uploading files.
String infoAddr =
NetUtils.getServerAddress(
conf,
"dfs.secondary.info.bindAddress",
"dfs.secondary.info.port",
"dfs.secondary.http.address");
InetSocketAddress infoSocAddr = NetUtils.createSocketAddr(infoAddr);
infoBindAddress = infoSocAddr.getHostName();
int tmpInfoPort = infoSocAddr.getPort();
infoServer = new HttpServer("secondary", infoBindAddress, tmpInfoPort, tmpInfoPort == 0, conf);
infoServer.setAttribute("name.system.image", checkpointImage);
this.infoServer.setAttribute("name.conf", conf);
infoServer.addInternalServlet("getimage", "/getimage", GetImageServlet.class);
infoServer.start();
// The web-server port can be ephemeral... ensure we have the correct info
infoPort = infoServer.getPort();
conf.set("dfs.secondary.http.address", infoBindAddress + ":" + infoPort);
LOG.info("Secondary Web-server up at: " + infoBindAddress + ":" + infoPort);
LOG.warn(
"Checkpoint Period :"
+ checkpointPeriod
+ " secs "
+ "("
+ checkpointPeriod / 60
+ " min)");
LOG.warn(
"Log Size Trigger :"
+ checkpointSize
+ " bytes "
+ "("
+ checkpointSize / 1024
+ " KB)");
}
public static void main(String argv[]) throws Exception {
if (DFSUtil.parseHelpArgument(argv, NameNode.USAGE, System.out, true)) {
System.exit(0);
}
try {
StringUtils.startupShutdownMessage(NameNode.class, argv, LOG);
NameNode namenode = createNameNode(argv, null);
if (namenode != null) {
namenode.join();
}
} catch (Throwable e) {
LOG.fatal("Exception in namenode join", e);
terminate(1, e);
}
}
public Lock getINodeLock(
NameNode nameNode,
TransactionLockTypes.INodeLockType lockType,
TransactionLockTypes.INodeResolveType resolveType,
boolean resolveLink,
boolean ignoreLocalSubtreeLocks,
String... paths) {
return new INodeLock(
lockType,
resolveType,
resolveLink,
ignoreLocalSubtreeLocks,
nameNode.getId(),
nameNode.getActiveNameNodes().getActiveNodes(),
paths);
}
public Lock getRenameINodeLock(
NameNode nameNode,
TransactionLockTypes.INodeLockType lockType,
TransactionLockTypes.INodeResolveType resolveType,
boolean ignoreLocalSubtreeLocks,
String src,
String dst) {
return new RenameINodeLock(
lockType,
resolveType,
ignoreLocalSubtreeLocks,
nameNode.getId(),
nameNode.getActiveNameNodes().getActiveNodes(),
src,
dst);
}
@Override // NamenodeProtocol
public NamenodeRegistration register(NamenodeRegistration registration) throws IOException {
verifyVersion(registration.getVersion());
NamenodeRegistration myRegistration = nn.setRegistration();
namesystem.registerBackupNode(registration, myRegistration);
return myRegistration;
}
private void listCorruptOpenFiles() throws IOException {
int matchedCorruptFilesCount = 0;
// directory representation of path
String pathdir = path.endsWith(Path.SEPARATOR) ? path : path + Path.SEPARATOR;
FileStatus pathFileStatus = nn.getNamesystem().getFileInfo(pathdir);
List<FileStatus> corruptFileStatusList = new ArrayList<FileStatus>();
checkForCorruptOpenFiles(pathFileStatus, corruptFileStatusList);
for (FileStatus fileStatus : corruptFileStatusList) {
String currentPath = fileStatus.getPath().toString();
if (currentPath.startsWith(pathdir) || currentPath.equals(path)) {
matchedCorruptFilesCount++;
// print the header before listing first item
if (matchedCorruptFilesCount == 1) {
out.println("Here are a few files that may be corrupted:");
out.println("===========================================");
}
out.println(currentPath);
}
}
out.println();
out.println(buildSummaryResultForListCorruptFiles(matchedCorruptFilesCount, path));
}
@Override // NamenodeProtocol
public void endCheckpoint(NamenodeRegistration registration, CheckpointSignature sig)
throws IOException {
verifyRequest(registration);
if (!nn.isRole(NamenodeRole.NAMENODE))
throw new IOException("Only an ACTIVE node can invoke endCheckpoint.");
namesystem.endCheckpoint(registration, sig);
}