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HDDS-2199. In SCMNodeManager dnsToUuidMap cannot track multiple DNs on the same host 

Closes #1551
This commit is contained in:
S O'Donnell 2019-10-04 14:00:06 +02:00 committed by Márton Elek
parent d061c8469f
commit 6171a41b4c
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GPG Key ID: D51EA8F00EE79B28
6 changed files with 149 additions and 25 deletions
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8
hadoop-hdds/server-scm/src/main/java/org/apache/hadoop/hdds/scm/node/NodeManager.java
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@ -192,11 +192,11 @@ public interface NodeManager extends StorageContainerNodeProtocol,
DatanodeDetails getNodeByUuid(String uuid);
/**
* Given datanode address(Ipaddress or hostname), returns the DatanodeDetails
* for the node.
* Given datanode address(Ipaddress or hostname), returns a list of
* DatanodeDetails for the datanodes running at that address.
*
* @param address datanode address
* @return the given datanode, or null if not found
* @return the given datanode, or empty list if none found
*/
DatanodeDetails getNodeByAddress(String address);
List<DatanodeDetails> getNodesByAddress(String address);
}

51
hadoop-hdds/server-scm/src/main/java/org/apache/hadoop/hdds/scm/node/SCMNodeManager.java
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@ -25,11 +25,13 @@ import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.LinkedList;
import java.util.UUID;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ScheduledFuture;
import java.util.stream.Collectors;
import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
import org.apache.hadoop.hdds.conf.OzoneConfiguration;
import org.apache.hadoop.hdds.protocol.DatanodeDetails;
import org.apache.hadoop.hdds.protocol.proto.HddsProtos.NodeState;
@ -98,7 +100,7 @@ public class SCMNodeManager implements NodeManager {
private final NetworkTopology clusterMap;
private final DNSToSwitchMapping dnsToSwitchMapping;
private final boolean useHostname;
private final ConcurrentHashMap<String, String> dnsToUuidMap =
private final ConcurrentHashMap<String, Set<String>> dnsToUuidMap =
new ConcurrentHashMap<>();
/**
@ -260,7 +262,7 @@ public class SCMNodeManager implements NodeManager {
}
nodeStateManager.addNode(datanodeDetails);
clusterMap.add(datanodeDetails);
dnsToUuidMap.put(dnsName, datanodeDetails.getUuidString());
addEntryTodnsToUuidMap(dnsName, datanodeDetails.getUuidString());
// Updating Node Report, as registration is successful
processNodeReport(datanodeDetails, nodeReport);
LOG.info("Registered Data node : {}", datanodeDetails);
@ -275,6 +277,26 @@ public class SCMNodeManager implements NodeManager {
.build();
}
/**
* Add an entry to the dnsToUuidMap, which maps hostname / IP to the DNs
* running on that host. As each address can have many DNs running on it,
* this is a one to many mapping.
* @param dnsName String representing the hostname or IP of the node
* @param uuid String representing the UUID of the registered node.
*/
@SuppressFBWarnings(value="AT_OPERATION_SEQUENCE_ON_CONCURRENT_ABSTRACTION",
justification="The method is synchronized and this is the only place "+
"dnsToUuidMap is modified")
private synchronized void addEntryTodnsToUuidMap(
String dnsName, String uuid) {
Set<String> dnList = dnsToUuidMap.get(dnsName);
if (dnList == null) {
dnList = ConcurrentHashMap.newKeySet();
dnsToUuidMap.put(dnsName, dnList);
}
dnList.add(uuid);
}
/**
* Send heartbeat to indicate the datanode is alive and doing well.
*
@ -584,29 +606,34 @@ public class SCMNodeManager implements NodeManager {
}
/**
* Given datanode address(Ipaddress or hostname), returns the DatanodeDetails
* for the node.
* Given datanode address(Ipaddress or hostname), return a list of
* DatanodeDetails for the datanodes registered on that address.
*
* @param address datanode address
* @return the given datanode, or null if not found
* @return the given datanode, or empty list if none found
*/
@Override
public DatanodeDetails getNodeByAddress(String address) {
public List<DatanodeDetails> getNodesByAddress(String address) {
List<DatanodeDetails> results = new LinkedList<>();
if (Strings.isNullOrEmpty(address)) {
LOG.warn("address is null");
return null;
return results;
}
String uuid = dnsToUuidMap.get(address);
if (uuid != null) {
Set<String> uuids = dnsToUuidMap.get(address);
if (uuids == null) {
LOG.warn("Cannot find node for address {}", address);
return results;
}
for (String uuid : uuids) {
DatanodeDetails temp = DatanodeDetails.newBuilder().setUuid(uuid).build();
try {
return nodeStateManager.getNode(temp);
results.add(nodeStateManager.getNode(temp));
} catch (NodeNotFoundException e) {
LOG.warn("Cannot find node for uuid {}", uuid);
}
}
LOG.warn("Cannot find node for address {}", address);
return null;
return results;
}
private String nodeResolve(String hostname) {

7
hadoop-hdds/server-scm/src/main/java/org/apache/hadoop/hdds/scm/server/SCMBlockProtocolServer.java
View File

@ -295,7 +295,12 @@ public class SCMBlockProtocolServer implements
boolean auditSuccess = true;
try{
NodeManager nodeManager = scm.getScmNodeManager();
Node client = nodeManager.getNodeByAddress(clientMachine);
Node client = null;
List<DatanodeDetails> possibleClients =
nodeManager.getNodesByAddress(clientMachine);
if (possibleClients.size()>0){
client = possibleClients.get(0);
}
List<Node> nodeList = new ArrayList();
nodes.stream().forEach(uuid -> {
DatanodeDetails node = nodeManager.getNodeByUuid(uuid);

36
hadoop-hdds/server-scm/src/test/java/org/apache/hadoop/hdds/scm/container/MockNodeManager.java
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@ -88,7 +88,7 @@ public class MockNodeManager implements NodeManager {
private final Node2PipelineMap node2PipelineMap;
private final Node2ContainerMap node2ContainerMap;
private NetworkTopology clusterMap;
private ConcurrentHashMap<String, String> dnsToUuidMap;
private ConcurrentHashMap<String, Set<String>> dnsToUuidMap;
public MockNodeManager(boolean initializeFakeNodes, int nodeCount) {
this.healthyNodes = new LinkedList<>();
@ -386,7 +386,7 @@ public class MockNodeManager implements NodeManager {
try {
node2ContainerMap.insertNewDatanode(datanodeDetails.getUuid(),
Collections.emptySet());
dnsToUuidMap.put(datanodeDetails.getIpAddress(),
addEntryTodnsToUuidMap(datanodeDetails.getIpAddress(),
datanodeDetails.getUuidString());
if (clusterMap != null) {
datanodeDetails.setNetworkName(datanodeDetails.getUuidString());
@ -398,6 +398,23 @@ public class MockNodeManager implements NodeManager {
return null;
}
/**
* Add an entry to the dnsToUuidMap, which maps hostname / IP to the DNs
* running on that host. As each address can have many DNs running on it,
* this is a one to many mapping.
* @param dnsName String representing the hostname or IP of the node
* @param uuid String representing the UUID of the registered node.
*/
private synchronized void addEntryTodnsToUuidMap(
String dnsName, String uuid) {
Set<String> dnList = dnsToUuidMap.get(dnsName);
if (dnList == null) {
dnList = ConcurrentHashMap.newKeySet();
dnsToUuidMap.put(dnsName, dnList);
}
dnList.add(uuid);
}
/**
* Send heartbeat to indicate the datanode is alive and doing well.
*
@ -484,8 +501,19 @@ public class MockNodeManager implements NodeManager {
}
@Override
public DatanodeDetails getNodeByAddress(String address) {
return getNodeByUuid(dnsToUuidMap.get(address));
public List<DatanodeDetails> getNodesByAddress(String address) {
List<DatanodeDetails> results = new LinkedList<>();
Set<String> uuids = dnsToUuidMap.get(address);
if (uuids == null) {
return results;
}
for(String uuid : uuids) {
DatanodeDetails dn = getNodeByUuid(uuid);
if (dn != null) {
results.add(dn);
}
}
return results;
}
public void setNetworkTopology(NetworkTopology topology) {

67
hadoop-hdds/server-scm/src/test/java/org/apache/hadoop/hdds/scm/node/TestSCMNodeManager.java
View File

@ -1064,6 +1064,25 @@ public class TestSCMNodeManager {
testScmRegisterNodeWithNetworkTopology(true);
}
/**
* Test getNodesByAddress when using IPs.
*
*/
@Test
public void testgetNodesByAddressWithIpAddress()
throws IOException, InterruptedException, AuthenticationException {
testGetNodesByAddress(false);
}
/**
* Test getNodesByAddress when using hostnames.
*/
@Test
public void testgetNodesByAddressWithHostname()
throws IOException, InterruptedException, AuthenticationException {
testGetNodesByAddress(true);
}
/**
* Test add node into a 4-layer network topology during node register.
*/
@ -1152,11 +1171,55 @@ public class TestSCMNodeManager {
// test get node
if (useHostname) {
Arrays.stream(hostNames).forEach(hostname ->
Assert.assertNotNull(nodeManager.getNodeByAddress(hostname)));
Assert.assertNotEquals(0, nodeManager.getNodesByAddress(hostname)
.size()));
} else {
Arrays.stream(ipAddress).forEach(ip ->
Assert.assertNotNull(nodeManager.getNodeByAddress(ip)));
Assert.assertNotEquals(0, nodeManager.getNodesByAddress(ip)
.size()));
}
}
}
/**
* Test add node into a 4-layer network topology during node register.
*/
private void testGetNodesByAddress(boolean useHostname)
throws IOException, InterruptedException, AuthenticationException {
OzoneConfiguration conf = getConf();
conf.setTimeDuration(OZONE_SCM_HEARTBEAT_PROCESS_INTERVAL, 1000,
MILLISECONDS);
// create a set of hosts - note two hosts on "host1"
String[] hostNames = {"host1", "host1", "host2", "host3", "host4"};
String[] ipAddress =
{"1.2.3.4", "1.2.3.4", "2.3.4.5", "3.4.5.6", "4.5.6.7"};
if (useHostname) {
conf.set(DFSConfigKeys.DFS_DATANODE_USE_DN_HOSTNAME, "true");
}
final int nodeCount = hostNames.length;
try (SCMNodeManager nodeManager = createNodeManager(conf)) {
DatanodeDetails[] nodes = new DatanodeDetails[nodeCount];
for (int i = 0; i < nodeCount; i++) {
DatanodeDetails node = TestUtils.createDatanodeDetails(
UUID.randomUUID().toString(), hostNames[i], ipAddress[i], null);
nodeManager.register(node, null, null);
}
// test get node
Assert.assertEquals(0, nodeManager.getNodesByAddress(null).size());
if (useHostname) {
Assert.assertEquals(2,
nodeManager.getNodesByAddress("host1").size());
Assert.assertEquals(1, nodeManager.getNodesByAddress("host2").size());
Assert.assertEquals(0, nodeManager.getNodesByAddress("unknown").size());
} else {
Assert.assertEquals(2,
nodeManager.getNodesByAddress("1.2.3.4").size());
Assert.assertEquals(1, nodeManager.getNodesByAddress("2.3.4.5").size());
Assert.assertEquals(0, nodeManager.getNodesByAddress("1.9.8.7").size());
}
}
}
}

5
hadoop-hdds/server-scm/src/test/java/org/apache/hadoop/ozone/container/testutils/ReplicationNodeManagerMock.java
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@ -44,6 +44,7 @@ import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.UUID;
import java.util.LinkedList;
/**
* A Node Manager to test replication.
@ -323,7 +324,7 @@ public class ReplicationNodeManagerMock implements NodeManager {
}
@Override
public DatanodeDetails getNodeByAddress(String address) {
return null;
public List<DatanodeDetails> getNodesByAddress(String address) {
return new LinkedList<>();
}
}