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HDFS-3934. duplicative dfs_hosts entries handled wrong. (cmccabe) 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1489065 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Colin McCabe 2013-06-03 17:14:27 +00:00
parent 9a3379f6b1
commit a7bfb25d2b
7 changed files with 311 additions and 118 deletions
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12
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/HostsFileReader.java
View File

@ -48,7 +48,8 @@ public class HostsFileReader {
refresh();
}
private void readFileToSet(String filename, Set<String> set) throws IOException {
public static void readFileToSet(String type,
String filename, Set<String> set) throws IOException {
File file = new File(filename);
FileInputStream fis = new FileInputStream(file);
BufferedReader reader = null;
@ -64,8 +65,9 @@ public class HostsFileReader {
break;
}
if (!nodes[i].isEmpty()) {
LOG.info("Adding " + nodes[i] + " to the list of hosts from " + filename);
set.add(nodes[i]); // might need to add canonical name
LOG.info("Adding " + nodes[i] + " to the list of " + type +
" hosts from " + filename);
set.add(nodes[i]);
}
}
}
@ -82,13 +84,13 @@ public class HostsFileReader {
LOG.info("Refreshing hosts (include/exclude) list");
if (!includesFile.isEmpty()) {
Set<String> newIncludes = new HashSet<String>();
readFileToSet(includesFile, newIncludes);
readFileToSet("included", includesFile, newIncludes);
// switch the new hosts that are to be included
includes = newIncludes;
}
if (!excludesFile.isEmpty()) {
Set<String> newExcludes = new HashSet<String>();
readFileToSet(excludesFile, newExcludes);
readFileToSet("excluded", excludesFile, newExcludes);
// switch the excluded hosts
excludes = newExcludes;
}

3
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
View File

@ -238,6 +238,9 @@ Trunk (Unreleased)
HDFS-4687. TestDelegationTokenForProxyUser#testWebHdfsDoAs is flaky with
JDK7. (Andrew Wang via atm)
HDFS-3934. duplicative dfs_hosts entries handled wrong. (Colin Patrick
McCabe)
Release 2.1.0-beta - UNRELEASED
INCOMPATIBLE CHANGES

5
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSConfigKeys.java
View File

@ -251,6 +251,9 @@ public class DFSConfigKeys extends CommonConfigurationKeys {
public static final String DFS_DATANODE_HOST_NAME_KEY = "dfs.datanode.hostname";
public static final String DFS_NAMENODE_HOSTS_KEY = "dfs.namenode.hosts";
public static final String DFS_NAMENODE_HOSTS_EXCLUDE_KEY = "dfs.namenode.hosts.exclude";
public static final String DFS_NAMENODE_HOSTS_DNS_RESOLUTION_INTERVAL_SECONDS =
"dfs.namenode.hosts.dns.resolution.interval.seconds";
public static final int DFS_NAMENODE_HOSTS_DNS_RESOLUTION_INTERVAL_SECONDS_DEFAULT = 300;
public static final String DFS_CLIENT_SOCKET_TIMEOUT_KEY = "dfs.client.socket-timeout";
public static final String DFS_NAMENODE_CHECKPOINT_DIR_KEY = "dfs.namenode.checkpoint.dir";
public static final String DFS_NAMENODE_CHECKPOINT_EDITS_DIR_KEY = "dfs.namenode.checkpoint.edits.dir";
@ -324,7 +327,7 @@ public class DFSConfigKeys extends CommonConfigurationKeys {
public static final String DFS_DATANODE_HTTPS_ADDRESS_DEFAULT = "0.0.0.0:" + DFS_DATANODE_HTTPS_DEFAULT_PORT;
public static final String DFS_DATANODE_IPC_ADDRESS_KEY = "dfs.datanode.ipc.address";
public static final int DFS_DATANODE_IPC_DEFAULT_PORT = 50020;
public static final String DFS_DATANODE_IPC_ADDRESS_DEFAULT = "0.0.0.0" + DFS_DATANODE_IPC_DEFAULT_PORT;
public static final String DFS_DATANODE_IPC_ADDRESS_DEFAULT = "0.0.0.0:" + DFS_DATANODE_IPC_DEFAULT_PORT;
public static final String DFS_DATANODE_MIN_SUPPORTED_NAMENODE_VERSION_KEY = "dfs.datanode.min.supported.namenode.version";
public static final String DFS_DATANODE_MIN_SUPPORTED_NAMENODE_VERSION_DEFAULT = "3.0.0-SNAPSHOT";

186
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java
View File

@ -26,11 +26,9 @@ import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.NavigableMap;
import java.util.Set;
import java.util.TreeMap;
import org.apache.commons.logging.Log;
@ -50,6 +48,10 @@ import org.apache.hadoop.hdfs.protocol.HdfsConstants.DatanodeReportType;
import org.apache.hadoop.hdfs.protocol.LocatedBlock;
import org.apache.hadoop.hdfs.protocol.UnregisteredNodeException;
import org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor.BlockTargetPair;
import org.apache.hadoop.hdfs.server.namenode.HostFileManager;
import org.apache.hadoop.hdfs.server.namenode.HostFileManager.Entry;
import org.apache.hadoop.hdfs.server.namenode.HostFileManager.EntrySet;
import org.apache.hadoop.hdfs.server.namenode.HostFileManager.MutableEntrySet;
import org.apache.hadoop.hdfs.server.namenode.NameNode;
import org.apache.hadoop.hdfs.server.namenode.Namesystem;
import org.apache.hadoop.hdfs.server.protocol.BalancerBandwidthCommand;
@ -62,16 +64,17 @@ import org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration;
import org.apache.hadoop.hdfs.server.protocol.DisallowedDatanodeException;
import org.apache.hadoop.hdfs.server.protocol.RegisterCommand;
import org.apache.hadoop.hdfs.util.CyclicIteration;
import org.apache.hadoop.io.IOUtils;
import org.apache.hadoop.ipc.Server;
import org.apache.hadoop.net.CachedDNSToSwitchMapping;
import org.apache.hadoop.net.DNSToSwitchMapping;
import org.apache.hadoop.net.NetUtils;
import org.apache.hadoop.net.NetworkTopology;
import org.apache.hadoop.net.NetworkTopology.InvalidTopologyException;
import org.apache.hadoop.net.Node;
import org.apache.hadoop.net.NodeBase;
import org.apache.hadoop.net.ScriptBasedMapping;
import org.apache.hadoop.util.Daemon;
import org.apache.hadoop.util.HostsFileReader;
import org.apache.hadoop.util.ReflectionUtils;
import org.apache.hadoop.util.Time;
@ -120,8 +123,14 @@ public class DatanodeManager {
private final DNSToSwitchMapping dnsToSwitchMapping;
private final int defaultXferPort;
private final int defaultInfoPort;
private final int defaultIpcPort;
/** Read include/exclude files*/
private final HostsFileReader hostsReader;
private final HostFileManager hostFileManager;
/** The period to wait for datanode heartbeat.*/
private final long heartbeatExpireInterval;
@ -162,13 +171,30 @@ public class DatanodeManager {
this.namesystem = namesystem;
this.blockManager = blockManager;
int dnsResolutionSeconds = conf.getInt(
DFSConfigKeys.DFS_NAMENODE_HOSTS_DNS_RESOLUTION_INTERVAL_SECONDS,
DFSConfigKeys.DFS_NAMENODE_HOSTS_DNS_RESOLUTION_INTERVAL_SECONDS_DEFAULT);
this.hostFileManager = new HostFileManager(dnsResolutionSeconds);
networktopology = NetworkTopology.getInstance(conf);
this.heartbeatManager = new HeartbeatManager(namesystem, blockManager, conf);
this.hostsReader = new HostsFileReader(
conf.get(DFSConfigKeys.DFS_HOSTS, ""),
this.defaultXferPort = NetUtils.createSocketAddr(
conf.get(DFSConfigKeys.DFS_DATANODE_ADDRESS_KEY,
DFSConfigKeys.DFS_DATANODE_ADDRESS_DEFAULT)).getPort();
this.defaultInfoPort = NetUtils.createSocketAddr(
conf.get(DFSConfigKeys.DFS_DATANODE_HTTP_ADDRESS_KEY,
DFSConfigKeys.DFS_DATANODE_HTTPS_ADDRESS_DEFAULT)).getPort();
this.defaultIpcPort = NetUtils.createSocketAddr(
conf.get(DFSConfigKeys.DFS_DATANODE_IPC_ADDRESS_KEY,
DFSConfigKeys.DFS_DATANODE_IPC_ADDRESS_DEFAULT)).getPort();
try {
this.hostFileManager.refresh(conf.get(DFSConfigKeys.DFS_HOSTS, ""),
conf.get(DFSConfigKeys.DFS_HOSTS_EXCLUDE, ""));
} catch (IOException e) {
LOG.error("error reading hosts files: ", e);
}
this.dnsToSwitchMapping = ReflectionUtils.newInstance(
conf.getClass(DFSConfigKeys.NET_TOPOLOGY_NODE_SWITCH_MAPPING_IMPL_KEY,
@ -178,9 +204,15 @@ public class DatanodeManager {
// locations of those hosts in the include list and store the mapping
// in the cache; so future calls to resolve will be fast.
if (dnsToSwitchMapping instanceof CachedDNSToSwitchMapping) {
dnsToSwitchMapping.resolve(new ArrayList<String>(hostsReader.getHosts()));
}
final ArrayList<String> locations = new ArrayList<String>();
for (Entry entry : hostFileManager.getIncludes()) {
if (!entry.getIpAddress().isEmpty()) {
locations.add(entry.getIpAddress());
}
}
dnsToSwitchMapping.resolve(locations);
};
final long heartbeatIntervalSeconds = conf.getLong(
DFSConfigKeys.DFS_HEARTBEAT_INTERVAL_KEY,
DFSConfigKeys.DFS_HEARTBEAT_INTERVAL_DEFAULT);
@ -264,6 +296,7 @@ public class DatanodeManager {
}
void close() {
IOUtils.cleanup(LOG, hostFileManager);
if (decommissionthread != null) {
decommissionthread.interrupt();
try {
@ -533,14 +566,6 @@ public class DatanodeManager {
return networkLocation;
}
private boolean inHostsList(DatanodeID node) {
return checkInList(node, hostsReader.getHosts(), false);
}
private boolean inExcludedHostsList(DatanodeID node) {
return checkInList(node, hostsReader.getExcludedHosts(), true);
}
/**
* Remove an already decommissioned data node who is neither in include nor
* exclude hosts lists from the the list of live or dead nodes. This is used
@ -570,13 +595,13 @@ public class DatanodeManager {
private void removeDecomNodeFromList(final List<DatanodeDescriptor> nodeList) {
// If the include list is empty, any nodes are welcomed and it does not
// make sense to exclude any nodes from the cluster. Therefore, no remove.
if (hostsReader.getHosts().isEmpty()) {
if (!hostFileManager.hasIncludes()) {
return;
}
for (Iterator<DatanodeDescriptor> it = nodeList.iterator(); it.hasNext();) {
DatanodeDescriptor node = it.next();
if ((!inHostsList(node)) && (!inExcludedHostsList(node))
if ((!hostFileManager.isIncluded(node)) && (!hostFileManager.isExcluded(node))
&& node.isDecommissioned()) {
// Include list is not empty, an existing datanode does not appear
// in both include or exclude lists and it has been decommissioned.
@ -586,35 +611,12 @@ public class DatanodeManager {
}
}
/**
* Check if the given DatanodeID is in the given (include or exclude) list.
*
* @param node the DatanodeID to check
* @param hostsList the list of hosts in the include/exclude file
* @param isExcludeList true if this is the exclude list
* @return true if the node is in the list, false otherwise
*/
private static boolean checkInList(final DatanodeID node,
final Set<String> hostsList,
final boolean isExcludeList) {
// if include list is empty, host is in include list
if ( (!isExcludeList) && (hostsList.isEmpty()) ){
return true;
}
for (String name : getNodeNamesForHostFiltering(node)) {
if (hostsList.contains(name)) {
return true;
}
}
return false;
}
/**
* Decommission the node if it is in exclude list.
*/
private void checkDecommissioning(DatanodeDescriptor nodeReg) {
// If the registered node is in exclude list, then decommission it
if (inExcludedHostsList(nodeReg)) {
if (hostFileManager.isExcluded(nodeReg)) {
startDecommission(nodeReg);
}
}
@ -710,7 +712,7 @@ public class DatanodeManager {
// Checks if the node is not on the hosts list. If it is not, then
// it will be disallowed from registering.
if (!inHostsList(nodeReg)) {
if (!hostFileManager.isIncluded(nodeReg)) {
throw new DisallowedDatanodeException(nodeReg);
}
@ -844,9 +846,8 @@ public class DatanodeManager {
if (conf == null) {
conf = new HdfsConfiguration();
}
hostsReader.updateFileNames(conf.get(DFSConfigKeys.DFS_HOSTS, ""),
conf.get(DFSConfigKeys.DFS_HOSTS_EXCLUDE, ""));
hostsReader.refresh();
this.hostFileManager.refresh(conf.get(DFSConfigKeys.DFS_HOSTS, ""),
conf.get(DFSConfigKeys.DFS_HOSTS_EXCLUDE, ""));
}
/**
@ -858,10 +859,10 @@ public class DatanodeManager {
private void refreshDatanodes() {
for(DatanodeDescriptor node : datanodeMap.values()) {
// Check if not include.
if (!inHostsList(node)) {
if (!hostFileManager.isIncluded(node)) {
node.setDisallowed(true); // case 2.
} else {
if (inExcludedHostsList(node)) {
if (hostFileManager.isExcluded(node)) {
startDecommission(node); // case 3.
} else {
stopDecommission(node); // case 4.
@ -1076,25 +1077,10 @@ public class DatanodeManager {
boolean listDeadNodes = type == DatanodeReportType.ALL ||
type == DatanodeReportType.DEAD;
HashMap<String, String> mustList = new HashMap<String, String>();
if (listDeadNodes) {
// Put all nodes referenced in the hosts files in the map
Iterator<String> it = hostsReader.getHosts().iterator();
while (it.hasNext()) {
mustList.put(it.next(), "");
}
it = hostsReader.getExcludedHosts().iterator();
while (it.hasNext()) {
mustList.put(it.next(), "");
}
}
ArrayList<DatanodeDescriptor> nodes = null;
final MutableEntrySet foundNodes = new MutableEntrySet();
synchronized(datanodeMap) {
nodes = new ArrayList<DatanodeDescriptor>(datanodeMap.size() +
mustList.size());
nodes = new ArrayList<DatanodeDescriptor>(datanodeMap.size());
Iterator<DatanodeDescriptor> it = datanodeMap.values().iterator();
while (it.hasNext()) {
DatanodeDescriptor dn = it.next();
@ -1102,47 +1088,45 @@ public class DatanodeManager {
if ( (isDead && listDeadNodes) || (!isDead && listLiveNodes) ) {
nodes.add(dn);
}
for (String name : getNodeNamesForHostFiltering(dn)) {
mustList.remove(name);
foundNodes.add(dn);
}
}
if (listDeadNodes) {
final EntrySet includedNodes = hostFileManager.getIncludes();
final EntrySet excludedNodes = hostFileManager.getExcludes();
for (Entry entry : includedNodes) {
if ((foundNodes.find(entry) == null) &&
(excludedNodes.find(entry) == null)) {
// The remaining nodes are ones that are referenced by the hosts
// files but that we do not know about, ie that we have never
// head from. Eg. an entry that is no longer part of the cluster
// or a bogus entry was given in the hosts files
//
// If the host file entry specified the xferPort, we use that.
// Otherwise, we guess that it is the default xfer port.
// We can't ask the DataNode what it had configured, because it's
// dead.
DatanodeDescriptor dn =
new DatanodeDescriptor(new DatanodeID(entry.getIpAddress(),
entry.getPrefix(), "",
entry.getPort() == 0 ? defaultXferPort : entry.getPort(),
defaultInfoPort, defaultIpcPort));
dn.setLastUpdate(0); // Consider this node dead for reporting
nodes.add(dn);
}
}
}
if (listDeadNodes) {
Iterator<String> it = mustList.keySet().iterator();
while (it.hasNext()) {
// The remaining nodes are ones that are referenced by the hosts
// files but that we do not know about, ie that we have never
// head from. Eg. a host that is no longer part of the cluster
// or a bogus entry was given in the hosts files
DatanodeID dnId = parseDNFromHostsEntry(it.next());
DatanodeDescriptor dn = new DatanodeDescriptor(dnId);
dn.setLastUpdate(0); // Consider this node dead for reporting
nodes.add(dn);
}
if (LOG.isDebugEnabled()) {
LOG.debug("getDatanodeListForReport with " +
"includedNodes = " + hostFileManager.getIncludes() +
", excludedNodes = " + hostFileManager.getExcludes() +
", foundNodes = " + foundNodes +
", nodes = " + nodes);
}
return nodes;
}
private static List<String> getNodeNamesForHostFiltering(DatanodeID node) {
String ip = node.getIpAddr();
String regHostName = node.getHostName();
int xferPort = node.getXferPort();
List<String> names = new ArrayList<String>();
names.add(ip);
names.add(ip + ":" + xferPort);
names.add(regHostName);
names.add(regHostName + ":" + xferPort);
String peerHostName = node.getPeerHostName();
if (peerHostName != null) {
names.add(peerHostName);
names.add(peerHostName + ":" + xferPort);
}
return names;
}
/**
* Checks if name resolution was successful for the given address. If IP
* address and host name are the same, then it means name resolution has

3
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataNode.java
View File

@ -936,7 +936,8 @@ public class DataNode extends Configured
MBeans.register("DataNode", "DataNodeInfo", this);
}
int getXferPort() {
@VisibleForTesting
public int getXferPort() {
return streamingAddr.getPort();
}

2
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDatanodeRegistration.java
View File

@ -222,6 +222,7 @@ public class TestDatanodeRegistration {
DatanodeRegistration mockDnReg = mock(DatanodeRegistration.class);
doReturn(HdfsConstants.LAYOUT_VERSION).when(mockDnReg).getVersion();
doReturn(123).when(mockDnReg).getXferPort();
doReturn("fake-storage-id").when(mockDnReg).getStorageID();
doReturn(mockStorageInfo).when(mockDnReg).getStorageInfo();
@ -275,6 +276,7 @@ public class TestDatanodeRegistration {
// Should succeed when software versions are the same and CTimes are the
// same.
doReturn(VersionInfo.getVersion()).when(mockDnReg).getSoftwareVersion();
doReturn(123).when(mockDnReg).getXferPort();
rpcServer.registerDatanode(mockDnReg);
// Should succeed when software versions are the same and CTimes are

218
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDecommission.java
View File

@ -24,7 +24,9 @@ import static org.junit.Assert.assertTrue;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Random;
import org.apache.commons.logging.Log;
@ -41,9 +43,11 @@ import org.apache.hadoop.hdfs.protocol.DatanodeInfo.AdminStates;
import org.apache.hadoop.hdfs.protocol.HdfsConstants.DatanodeReportType;
import org.apache.hadoop.hdfs.protocol.LocatedBlock;
import org.apache.hadoop.hdfs.server.namenode.FSNamesystem;
import org.apache.hadoop.hdfs.server.namenode.HostFileManager;
import org.apache.hadoop.hdfs.server.namenode.NameNode;
import org.apache.hadoop.hdfs.server.namenode.NameNodeAdapter;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
@ -75,6 +79,7 @@ public class TestDecommission {
Path dir = new Path(workingDir, System.getProperty("test.build.data", "target/test/data") + "/work-dir/decommission");
hostsFile = new Path(dir, "hosts");
excludeFile = new Path(dir, "exclude");
HostFileManager.dnsResolutionDisabledForTesting = false;
// Setup conf
conf.setBoolean(DFSConfigKeys.DFS_NAMENODE_REPLICATION_CONSIDERLOAD_KEY, false);
@ -96,6 +101,7 @@ public class TestDecommission {
if (cluster != null) {
cluster.shutdown();
}
HostFileManager.dnsResolutionDisabledForTesting = false;
}
private void writeConfigFile(Path name, ArrayList<String> nodes)
@ -327,7 +333,7 @@ public class TestDecommission {
/**
* Tests decommission for non federated cluster
*/
@Test
@Test(timeout=360000)
public void testDecommission() throws IOException {
testDecommission(1, 6);
}
@ -335,7 +341,7 @@ public class TestDecommission {
/**
* Tests recommission for non federated cluster
*/
@Test
@Test(timeout=360000)
public void testRecommission() throws IOException {
testRecommission(1, 6);
}
@ -343,7 +349,7 @@ public class TestDecommission {
/**
* Test decommission for federeated cluster
*/
@Test
@Test(timeout=360000)
public void testDecommissionFederation() throws IOException {
testDecommission(2, 2);
}
@ -445,7 +451,7 @@ public class TestDecommission {
* Tests cluster storage statistics during decommissioning for non
* federated cluster
*/
@Test
@Test(timeout=360000)
public void testClusterStats() throws Exception {
testClusterStats(1);
}
@ -454,7 +460,7 @@ public class TestDecommission {
* Tests cluster storage statistics during decommissioning for
* federated cluster
*/
@Test
@Test(timeout=360000)
public void testClusterStatsFederation() throws Exception {
testClusterStats(3);
}
@ -491,7 +497,7 @@ public class TestDecommission {
* in the include file are allowed to connect to the namenode in a non
* federated cluster.
*/
@Test
@Test(timeout=360000)
public void testHostsFile() throws IOException, InterruptedException {
// Test for a single namenode cluster
testHostsFile(1);
@ -502,7 +508,7 @@ public class TestDecommission {
* in the include file are allowed to connect to the namenode in a
* federated cluster.
*/
@Test
@Test(timeout=360000)
public void testHostsFileFederation() throws IOException, InterruptedException {
// Test for 3 namenode federated cluster
testHostsFile(3);
@ -519,8 +525,8 @@ public class TestDecommission {
// Now empty hosts file and ensure the datanode is disallowed
// from talking to namenode, resulting in it's shutdown.
ArrayList<String>list = new ArrayList<String>();
final String badHostname = "BOGUSHOST";
list.add(badHostname);
final String bogusIp = "127.0.30.1";
list.add(bogusIp);
writeConfigFile(hostsFile, list);
for (int j = 0; j < numNameNodes; j++) {
@ -544,7 +550,199 @@ public class TestDecommission {
assertEquals("There should be 2 dead nodes", 2, info.length);
DatanodeID id = cluster.getDataNodes().get(0).getDatanodeId();
assertEquals(id.getHostName(), info[0].getHostName());
assertEquals(badHostname, info[1].getHostName());
assertEquals(bogusIp, info[1].getHostName());
}
}
@Test(timeout=360000)
public void testDuplicateHostsEntries() throws IOException,
InterruptedException {
Configuration hdfsConf = new Configuration(conf);
cluster = new MiniDFSCluster.Builder(hdfsConf)
.numDataNodes(1).setupHostsFile(true).build();
cluster.waitActive();
int dnPort = cluster.getDataNodes().get(0).getXferPort();
// pick some random ports that don't overlap with our DN's port
// or with each other.
Random random = new Random(System.currentTimeMillis());
int port1 = dnPort;
while (port1 == dnPort) {
port1 = random.nextInt(6000) + 1000;
}
int port2 = dnPort;
while ((port2 == dnPort) || (port2 == port1)) {
port2 = random.nextInt(6000) + 1000;
}
// Now empty hosts file and ensure the datanode is disallowed
// from talking to namenode, resulting in it's shutdown.
ArrayList<String> nodes = new ArrayList<String>();
// These entries will be de-duped by the NameNode, since they refer
// to the same IP address + port combo.
nodes.add("127.0.0.1:" + port1);
nodes.add("localhost:" + port1);
nodes.add("127.0.0.1:" + port1);
// The following entries should not be de-duped.
nodes.add("127.0.0.1:" + port2);
nodes.add("127.0.30.1:" + port1);
writeConfigFile(hostsFile, nodes);
refreshNodes(cluster.getNamesystem(0), hdfsConf);
DFSClient client = getDfsClient(cluster.getNameNode(0), hdfsConf);
DatanodeInfo[] info = client.datanodeReport(DatanodeReportType.LIVE);
for (int i = 0 ; i < 5 && info.length != 0; i++) {
LOG.info("Waiting for datanode to be marked dead");
Thread.sleep(HEARTBEAT_INTERVAL * 1000);
info = client.datanodeReport(DatanodeReportType.LIVE);
}
assertEquals("Number of live nodes should be 0", 0, info.length);
// Test that non-live and bogus hostnames are considered "dead".
// The dead report should have an entry for (1) the DN that is
// now considered dead because it is no longer allowed to connect
// and (2) the bogus entries in the hosts file.
DatanodeInfo deadDns[] = client.datanodeReport(DatanodeReportType.DEAD);
HashMap<String, DatanodeInfo> deadByXferAddr =
new HashMap<String, DatanodeInfo>();
for (DatanodeInfo dn : deadDns) {
LOG.info("DEAD DatanodeInfo: xferAddr = " + dn.getXferAddr() +
", ipAddr = " + dn.getIpAddr() +
", hostname = " + dn.getHostName());
deadByXferAddr.put(dn.getXferAddr(), dn);
}
// The real DataNode should be included in the list.
String realDnIpPort = cluster.getDataNodes().get(0).
getXferAddress().getAddress().getHostAddress() + ":" +
cluster.getDataNodes().get(0).getXferPort();
Assert.assertNotNull("failed to find real datanode IP " + realDnIpPort,
deadByXferAddr.remove(realDnIpPort));
// The fake datanode with address 127.0.30.1 should be included in this list.
Assert.assertNotNull(deadByXferAddr.remove(
"127.0.30.1:" + port1));
// Now look for the two copies of 127.0.0.1 with port1 and port2.
Iterator<Map.Entry<String, DatanodeInfo>> iter =
deadByXferAddr.entrySet().iterator();
boolean foundPort1 = false, foundPort2 = false;
while (iter.hasNext()) {
Map.Entry<String, DatanodeInfo> entry = iter.next();
DatanodeInfo dn = entry.getValue();
if (dn.getXferPort() == port1) {
foundPort1 = true;
iter.remove();
} else if (dn.getXferPort() == port2) {
foundPort2 = true;
iter.remove();
}
}
Assert.assertTrue("did not find a dead entry with port " + port1,
foundPort1);
Assert.assertTrue("did not find a dead entry with port " + port2,
foundPort2);
Assert.assertTrue(deadByXferAddr.isEmpty());
}
@Test(timeout=360000)
public void testIncludeByRegistrationName() throws IOException,
InterruptedException {
Configuration hdfsConf = new Configuration(conf);
final String registrationName = "--registration-name--";
final String nonExistentDn = "127.0.0.40";
hdfsConf.set(DFSConfigKeys.DFS_DATANODE_HOST_NAME_KEY, registrationName);
cluster = new MiniDFSCluster.Builder(hdfsConf)
.numDataNodes(1).checkDataNodeHostConfig(true)
.setupHostsFile(true).build();
cluster.waitActive();
// Set up an includes file that doesn't have our datanode.
ArrayList<String> nodes = new ArrayList<String>();
nodes.add(nonExistentDn);
writeConfigFile(hostsFile, nodes);
refreshNodes(cluster.getNamesystem(0), hdfsConf);
// Wait for the DN to be marked dead.
DFSClient client = getDfsClient(cluster.getNameNode(0), hdfsConf);
while (true) {
DatanodeInfo info[] = client.datanodeReport(DatanodeReportType.DEAD);
if (info.length == 1) {
break;
}
LOG.info("Waiting for datanode to be marked dead");
Thread.sleep(HEARTBEAT_INTERVAL * 1000);
}
// Use a non-empty include file with our registration name.
// It should work.
int dnPort = cluster.getDataNodes().get(0).getXferPort();
nodes = new ArrayList<String>();
nodes.add(registrationName + ":" + dnPort);
writeConfigFile(hostsFile, nodes);
refreshNodes(cluster.getNamesystem(0), hdfsConf);
cluster.restartDataNode(0);
// Wait for the DN to come back.
while (true) {
DatanodeInfo info[] = client.datanodeReport(DatanodeReportType.LIVE);
if (info.length == 1) {
Assert.assertFalse(info[0].isDecommissioned());
Assert.assertFalse(info[0].isDecommissionInProgress());
assertEquals(registrationName, info[0].getHostName());
break;
}
LOG.info("Waiting for datanode to come back");
Thread.sleep(HEARTBEAT_INTERVAL * 1000);
}
}
@Test(timeout=360000)
public void testBackgroundDnsResolution() throws IOException,
InterruptedException {
// Create cluster
Configuration hdfsConf = new Configuration(conf);
hdfsConf.setInt(
DFSConfigKeys.DFS_NAMENODE_HOSTS_DNS_RESOLUTION_INTERVAL_SECONDS, 1);
cluster = new MiniDFSCluster.Builder(hdfsConf)
.numDataNodes(1).checkDataNodeHostConfig(true)
.setupHostsFile(true).build();
cluster.waitActive();
// Set up an includes file with just 127.0.0.1
ArrayList<String> nodes = new ArrayList<String>();
String localhost = java.net.InetAddress.getLocalHost().getHostName();
nodes.add(localhost);
writeConfigFile(hostsFile, nodes);
HostFileManager.dnsResolutionDisabledForTesting = true;
refreshNodes(cluster.getNamesystem(0), hdfsConf);
// The DN will be marked dead because DNS resolution was turned off,
// and we are in the include file by hostname only.
DFSClient client = getDfsClient(cluster.getNameNode(0), hdfsConf);
while (true) {
DatanodeInfo info[] = client.datanodeReport(DatanodeReportType.DEAD);
if (info.length == 1) {
break;
}
LOG.info("Waiting for datanode to be marked dead");
Thread.sleep(HEARTBEAT_INTERVAL * 1000);
}
// Allow hostname resolution
HostFileManager.dnsResolutionDisabledForTesting = false;
cluster.restartDataNode(0);
// Wait for the DN to come back.
while (true) {
DatanodeInfo info[] = client.datanodeReport(DatanodeReportType.LIVE);
if (info.length == 1) {
Assert.assertFalse(info[0].isDecommissioned());
Assert.assertFalse(info[0].isDecommissionInProgress());
break;
}
LOG.info("Waiting for datanode to come back");
Thread.sleep(HEARTBEAT_INTERVAL * 1000);
}
}
}