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HDFS-7375. Move FSClusterStats to o.a.h.h.hdfs.server.blockmanagement. Contributed by Haohui Mai.

This commit is contained in:
Haohui Mai 2014-11-11 18:22:40 -08:00
parent 7e1e0cbbb8
commit 3cb426be45
13 changed files with 182 additions and 145 deletions
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3
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
View File

@ -98,6 +98,9 @@ Release 2.7.0 - UNRELEASED
HDFS-7381. Decouple the management of block id and gen stamps from
FSNamesystem. (wheat9)
HDFS-7375. Move FSClusterStats to o.a.h.h.hdfs.server.blockmanagement.
(wheat9)
OPTIMIZATIONS
BUG FIXES

10
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManager.java
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@ -66,7 +66,6 @@ import org.apache.hadoop.hdfs.server.blockmanagement.CorruptReplicasMap.Reason;
import org.apache.hadoop.hdfs.server.blockmanagement.PendingDataNodeMessages.ReportedBlockInfo;
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.BlockUCState;
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.ReplicaState;
import org.apache.hadoop.hdfs.server.namenode.FSClusterStats;
import org.apache.hadoop.hdfs.server.namenode.NameNode;
import org.apache.hadoop.hdfs.server.namenode.NameNode.OperationCategory;
import org.apache.hadoop.hdfs.server.namenode.Namesystem;
@ -265,8 +264,8 @@ public class BlockManager {
/** Check whether name system is running before terminating */
private boolean checkNSRunning = true;
public BlockManager(final Namesystem namesystem, final FSClusterStats stats,
final Configuration conf) throws IOException {
public BlockManager(final Namesystem namesystem, final Configuration conf)
throws IOException {
this.namesystem = namesystem;
datanodeManager = new DatanodeManager(this, namesystem, conf);
heartbeatManager = datanodeManager.getHeartbeatManager();
@ -281,8 +280,9 @@ public class BlockManager {
blocksMap = new BlocksMap(
LightWeightGSet.computeCapacity(2.0, "BlocksMap"));
blockplacement = BlockPlacementPolicy.getInstance(
conf, stats, datanodeManager.getNetworkTopology(),
datanodeManager.getHost2DatanodeMap());
conf, datanodeManager.getFSClusterStats(),
datanodeManager.getNetworkTopology(),
datanodeManager.getHost2DatanodeMap());
storagePolicySuite = BlockStoragePolicySuite.createDefaultSuite();
pendingReplications = new PendingReplicationBlocks(conf.getInt(
DFSConfigKeys.DFS_NAMENODE_REPLICATION_PENDING_TIMEOUT_SEC_KEY,

1
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockPlacementPolicy.java
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@ -33,7 +33,6 @@ import org.apache.hadoop.hdfs.StorageType;
import org.apache.hadoop.hdfs.protocol.Block;
import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
import org.apache.hadoop.hdfs.protocol.LocatedBlock;
import org.apache.hadoop.hdfs.server.namenode.FSClusterStats;
import org.apache.hadoop.net.NetworkTopology;
import org.apache.hadoop.net.Node;
import org.apache.hadoop.util.ReflectionUtils;

1
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockPlacementPolicyDefault.java
View File

@ -31,7 +31,6 @@ import org.apache.hadoop.hdfs.protocol.Block;
import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
import org.apache.hadoop.hdfs.protocol.HdfsConstants;
import org.apache.hadoop.hdfs.protocol.LocatedBlock;
import org.apache.hadoop.hdfs.server.namenode.FSClusterStats;
import org.apache.hadoop.hdfs.server.protocol.DatanodeStorage.State;
import org.apache.hadoop.net.NetworkTopology;
import org.apache.hadoop.net.Node;

1
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockPlacementPolicyWithNodeGroup.java
View File

@ -23,7 +23,6 @@ import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hdfs.DFSUtil;
import org.apache.hadoop.hdfs.StorageType;
import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
import org.apache.hadoop.hdfs.server.namenode.FSClusterStats;
import org.apache.hadoop.net.NetworkTopology;
import org.apache.hadoop.net.NetworkTopologyWithNodeGroup;
import org.apache.hadoop.net.Node;

38
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java
View File

@ -66,6 +66,7 @@ public class DatanodeManager {
private final Namesystem namesystem;
private final BlockManager blockManager;
private final HeartbeatManager heartbeatManager;
private final FSClusterStats fsClusterStats;
private Daemon decommissionthread = null;
/**
@ -176,6 +177,7 @@ public class DatanodeManager {
this.blockManager = blockManager;
this.heartbeatManager = new HeartbeatManager(namesystem, blockManager, conf);
this.fsClusterStats = newFSClusterStats();
networktopology = NetworkTopology.getInstance(conf);
@ -329,6 +331,11 @@ public class DatanodeManager {
return heartbeatManager;
}
@VisibleForTesting
public FSClusterStats getFSClusterStats() {
return fsClusterStats;
}
/** @return the datanode statistics. */
public DatanodeStatistics getDatanodeStatistics() {
return heartbeatManager;
@ -1594,5 +1601,36 @@ public class DatanodeManager {
public void setShouldSendCachingCommands(boolean shouldSendCachingCommands) {
this.shouldSendCachingCommands = shouldSendCachingCommands;
}
FSClusterStats newFSClusterStats() {
return new FSClusterStats() {
@Override
public int getTotalLoad() {
return heartbeatManager.getXceiverCount();
}
@Override
public boolean isAvoidingStaleDataNodesForWrite() {
return shouldAvoidStaleDataNodesForWrite();
}
@Override
public int getNumDatanodesInService() {
return heartbeatManager.getNumDatanodesInService();
}
@Override
public double getInServiceXceiverAverage() {
double avgLoad = 0;
final int nodes = getNumDatanodesInService();
if (nodes != 0) {
final int xceivers = heartbeatManager
.getInServiceXceiverCount();
avgLoad = (double)xceivers/nodes;
}
return avgLoad;
}
};
}
}

4
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSClusterStats.java → hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/FSClusterStats.java
View File

@ -15,7 +15,7 @@
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hdfs.server.namenode;
package org.apache.hadoop.hdfs.server.blockmanagement;
import org.apache.hadoop.classification.InterfaceAudience;
@ -58,5 +58,3 @@ public interface FSClusterStats {
*/
public double getInServiceXceiverAverage();
}

28
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
View File

@ -309,8 +309,8 @@ import com.google.common.collect.Lists;
***************************************************/
@InterfaceAudience.Private
@Metrics(context="dfs")
public class FSNamesystem implements Namesystem, FSClusterStats,
FSNamesystemMBean, NameNodeMXBean {
public class FSNamesystem implements Namesystem, FSNamesystemMBean,
NameNodeMXBean {
public static final Log LOG = LogFactory.getLog(FSNamesystem.class);
private static final ThreadLocal<StringBuilder> auditBuffer =
@ -761,7 +761,7 @@ public class FSNamesystem implements Namesystem, FSClusterStats,
DFS_NAMENODE_RESOURCE_CHECK_INTERVAL_KEY,
DFS_NAMENODE_RESOURCE_CHECK_INTERVAL_DEFAULT);
this.blockManager = new BlockManager(this, this, conf);
this.blockManager = new BlockManager(this, conf);
this.datanodeStatistics = blockManager.getDatanodeManager().getDatanodeStatistics();
this.blockIdManager = new BlockIdManager(blockManager);
@ -7825,28 +7825,6 @@ public class FSNamesystem implements Namesystem, FSClusterStats,
this.nnResourceChecker = nnResourceChecker;
}
@Override
public boolean isAvoidingStaleDataNodesForWrite() {
return this.blockManager.getDatanodeManager()
.shouldAvoidStaleDataNodesForWrite();
}
@Override // FSClusterStats
public int getNumDatanodesInService() {
return datanodeStatistics.getNumDatanodesInService();
}
@Override // for block placement strategy
public double getInServiceXceiverAverage() {
double avgLoad = 0;
final int nodes = getNumDatanodesInService();
if (nodes != 0) {
final int xceivers = datanodeStatistics.getInServiceXceiverCount();
avgLoad = (double)xceivers/nodes;
}
return avgLoad;
}
public SnapshotManager getSnapshotManager() {
return snapshotManager;
}

8
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestBlockManager.java
View File

@ -82,18 +82,16 @@ public class TestBlockManager {
private static final int BLOCK_SIZE = 64*1024;
private Configuration conf;
private FSNamesystem fsn;
private BlockManager bm;
@Before
public void setupMockCluster() throws IOException {
conf = new HdfsConfiguration();
conf.set(DFSConfigKeys.NET_TOPOLOGY_SCRIPT_FILE_NAME_KEY,
"need to set a dummy value here so it assumes a multi-rack cluster");
Configuration conf = new HdfsConfiguration();
conf.set(DFSConfigKeys.NET_TOPOLOGY_SCRIPT_FILE_NAME_KEY, "need to set a dummy value here so it assumes a multi-rack cluster");
fsn = Mockito.mock(FSNamesystem.class);
Mockito.doReturn(true).when(fsn).hasWriteLock();
bm = new BlockManager(fsn, fsn, conf);
bm = new BlockManager(fsn, conf);
final String[] racks = {
"/rackA",
"/rackA",

5
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestReplicationPolicy.java
View File

@ -49,12 +49,11 @@ import org.apache.hadoop.hdfs.StorageType;
import org.apache.hadoop.hdfs.TestBlockStoragePolicy;
import org.apache.hadoop.hdfs.protocol.Block;
import org.apache.hadoop.hdfs.protocol.HdfsConstants;
import org.apache.hadoop.hdfs.server.datanode.DataNode;
import org.apache.hadoop.hdfs.server.datanode.DataNodeTestUtils;
import org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.StatefulBlockInfo;
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.BlockUCState;
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.ReplicaState;
import org.apache.hadoop.hdfs.server.namenode.FSClusterStats;
import org.apache.hadoop.hdfs.server.datanode.DataNode;
import org.apache.hadoop.hdfs.server.datanode.DataNodeTestUtils;
import org.apache.hadoop.hdfs.server.namenode.NameNode;
import org.apache.hadoop.hdfs.server.namenode.Namesystem;
import org.apache.hadoop.hdfs.server.protocol.DatanodeStorage;

6
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestReplicationPolicyConsiderLoad.java
View File

@ -130,7 +130,8 @@ public class TestReplicationPolicyConsiderLoad {
final int load = 2 + 4 + 4;
FSNamesystem fsn = namenode.getNamesystem();
assertEquals((double)load/6, fsn.getInServiceXceiverAverage(), EPSILON);
assertEquals((double)load/6, dnManager.getFSClusterStats()
.getInServiceXceiverAverage(), EPSILON);
// Decommission DNs so BlockPlacementPolicyDefault.isGoodTarget()
// returns false
@ -139,7 +140,8 @@ public class TestReplicationPolicyConsiderLoad {
dnManager.startDecommission(d);
d.setDecommissioned();
}
assertEquals((double)load/3, fsn.getInServiceXceiverAverage(), EPSILON);
assertEquals((double)load/3, dnManager.getFSClusterStats()
.getInServiceXceiverAverage(), EPSILON);
// update references of writer DN to update the de-commissioned state
List<DatanodeDescriptor> liveNodes = new ArrayList<DatanodeDescriptor>();

126
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestNameNodeMXBean.java
View File

@ -17,18 +17,7 @@
*/
package org.apache.hadoop.hdfs.server.namenode;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import java.io.File;
import java.lang.management.ManagementFactory;
import java.net.URI;
import java.util.Collection;
import java.util.Map;
import javax.management.MBeanServer;
import javax.management.ObjectName;
import com.google.common.util.concurrent.Uninterruptibles;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.FileUtil;
@ -43,6 +32,18 @@ import org.apache.hadoop.util.VersionInfo;
import org.junit.Test;
import org.mortbay.util.ajax.JSON;
import javax.management.MBeanServer;
import javax.management.ObjectName;
import java.io.File;
import java.lang.management.ManagementFactory;
import java.net.URI;
import java.util.Collection;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
/**
* Class for testing {@link NameNodeMXBean} implementation
*/
@ -62,14 +63,11 @@ public class TestNameNodeMXBean {
public void testNameNodeMXBeanInfo() throws Exception {
Configuration conf = new Configuration();
conf.setLong(DFSConfigKeys.DFS_DATANODE_MAX_LOCKED_MEMORY_KEY,
NativeIO.POSIX.getCacheManipulator().getMemlockLimit());
conf.setInt(DFSConfigKeys.DFS_HEARTBEAT_INTERVAL_KEY, 1);
conf.setInt(DFSConfigKeys.DFS_NAMENODE_HEARTBEAT_RECHECK_INTERVAL_KEY, 1);
NativeIO.POSIX.getCacheManipulator().getMemlockLimit());
MiniDFSCluster cluster = null;
try {
cluster = new MiniDFSCluster.Builder(conf).numDataNodes(3).build();
cluster = new MiniDFSCluster.Builder(conf).build();
cluster.waitActive();
FSNamesystem fsn = cluster.getNameNode().namesystem;
@ -77,29 +75,6 @@ public class TestNameNodeMXBean {
MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
ObjectName mxbeanName = new ObjectName(
"Hadoop:service=NameNode,name=NameNodeInfo");
// Define include file to generate deadNodes metrics
FileSystem localFileSys = FileSystem.getLocal(conf);
Path workingDir = localFileSys.getWorkingDirectory();
Path dir = new Path(workingDir,
"build/test/data/temp/TestNameNodeMXBean");
Path includeFile = new Path(dir, "include");
assertTrue(localFileSys.mkdirs(dir));
StringBuilder includeHosts = new StringBuilder();
for(DataNode dn : cluster.getDataNodes()) {
includeHosts.append(dn.getDisplayName()).append("\n");
}
DFSTestUtil.writeFile(localFileSys, includeFile, includeHosts.toString());
conf.set(DFSConfigKeys.DFS_HOSTS, includeFile.toUri().getPath());
fsn.getBlockManager().getDatanodeManager().refreshNodes(conf);
cluster.stopDataNode(0);
while (fsn.getNumDatanodesInService() != 2) {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {}
}
// get attribute "ClusterId"
String clusterId = (String) mbs.getAttribute(mxbeanName, "ClusterId");
assertEquals(fsn.getClusterId(), clusterId);
@ -127,8 +102,7 @@ public class TestNameNodeMXBean {
// get attribute percentremaining
Float percentremaining = (Float) (mbs.getAttribute(mxbeanName,
"PercentRemaining"));
assertEquals(fsn.getPercentRemaining(), percentremaining
.floatValue(), DELTA);
assertEquals(fsn.getPercentRemaining(), percentremaining, DELTA);
// get attribute Totalblocks
Long totalblocks = (Long) (mbs.getAttribute(mxbeanName, "TotalBlocks"));
assertEquals(fsn.getTotalBlocks(), totalblocks.longValue());
@ -151,15 +125,6 @@ public class TestNameNodeMXBean {
String deadnodeinfo = (String) (mbs.getAttribute(mxbeanName,
"DeadNodes"));
assertEquals(fsn.getDeadNodes(), deadnodeinfo);
Map<String, Map<String, Object>> deadNodes =
(Map<String, Map<String, Object>>) JSON.parse(deadnodeinfo);
assertTrue(deadNodes.size() > 0);
for (Map<String, Object> deadNode : deadNodes.values()) {
assertTrue(deadNode.containsKey("lastContact"));
assertTrue(deadNode.containsKey("decommissioned"));
assertTrue(deadNode.containsKey("xferaddr"));
}
// get attribute NodeUsage
String nodeUsage = (String) (mbs.getAttribute(mxbeanName,
"NodeUsage"));
@ -233,4 +198,63 @@ public class TestNameNodeMXBean {
}
}
}
@SuppressWarnings({ "unchecked" })
@Test
public void testLastContactTime() throws Exception {
Configuration conf = new Configuration();
conf.setInt(DFSConfigKeys.DFS_HEARTBEAT_INTERVAL_KEY, 1);
conf.setInt(DFSConfigKeys.DFS_NAMENODE_HEARTBEAT_RECHECK_INTERVAL_KEY, 1);
MiniDFSCluster cluster = null;
try {
cluster = new MiniDFSCluster.Builder(conf).numDataNodes(3).build();
cluster.waitActive();
FSNamesystem fsn = cluster.getNameNode().namesystem;
MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
ObjectName mxbeanName = new ObjectName(
"Hadoop:service=NameNode,name=NameNodeInfo");
// Define include file to generate deadNodes metrics
FileSystem localFileSys = FileSystem.getLocal(conf);
Path workingDir = localFileSys.getWorkingDirectory();
Path dir = new Path(workingDir,
"build/test/data/temp/TestNameNodeMXBean");
Path includeFile = new Path(dir, "include");
assertTrue(localFileSys.mkdirs(dir));
StringBuilder includeHosts = new StringBuilder();
for(DataNode dn : cluster.getDataNodes()) {
includeHosts.append(dn.getDisplayName()).append("\n");
}
DFSTestUtil.writeFile(localFileSys, includeFile, includeHosts.toString());
conf.set(DFSConfigKeys.DFS_HOSTS, includeFile.toUri().getPath());
fsn.getBlockManager().getDatanodeManager().refreshNodes(conf);
cluster.stopDataNode(0);
while (fsn.getBlockManager().getDatanodeManager().getNumLiveDataNodes()
!= 2 ) {
Uninterruptibles.sleepUninterruptibly(1, TimeUnit.SECONDS);
}
// get attribute deadnodeinfo
String deadnodeinfo = (String) (mbs.getAttribute(mxbeanName,
"DeadNodes"));
assertEquals(fsn.getDeadNodes(), deadnodeinfo);
Map<String, Map<String, Object>> deadNodes =
(Map<String, Map<String, Object>>) JSON.parse(deadnodeinfo);
assertTrue(deadNodes.size() > 0);
for (Map<String, Object> deadNode : deadNodes.values()) {
assertTrue(deadNode.containsKey("lastContact"));
assertTrue(deadNode.containsKey("decommissioned"));
assertTrue(deadNode.containsKey("xferaddr"));
}
} finally {
if (cluster != null) {
cluster.shutdown();
}
}
}
}

70
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestNamenodeCapacityReport.java
View File

@ -193,11 +193,7 @@ public class TestNamenodeCapacityReport {
int expectedTotalLoad = nodes; // xceiver server adds 1 to load
int expectedInServiceNodes = nodes;
int expectedInServiceLoad = nodes;
assertEquals(nodes, namesystem.getNumLiveDataNodes());
assertEquals(expectedInServiceNodes, namesystem.getNumDatanodesInService());
assertEquals(expectedTotalLoad, namesystem.getTotalLoad());
assertEquals((double)expectedInServiceLoad/expectedInServiceLoad,
namesystem.getInServiceXceiverAverage(), EPSILON);
checkClusterHealth(nodes, namesystem, expectedTotalLoad, expectedInServiceNodes, expectedInServiceLoad);
// shutdown half the nodes and force a heartbeat check to ensure
// counts are accurate
@ -209,7 +205,7 @@ public class TestNamenodeCapacityReport {
BlockManagerTestUtil.checkHeartbeat(namesystem.getBlockManager());
expectedInServiceNodes--;
assertEquals(expectedInServiceNodes, namesystem.getNumLiveDataNodes());
assertEquals(expectedInServiceNodes, namesystem.getNumDatanodesInService());
assertEquals(expectedInServiceNodes, getNumDNInService(namesystem));
}
// restart the nodes to verify that counts are correct after
@ -219,11 +215,7 @@ public class TestNamenodeCapacityReport {
datanodes = cluster.getDataNodes();
expectedInServiceNodes = nodes;
assertEquals(nodes, datanodes.size());
assertEquals(nodes, namesystem.getNumLiveDataNodes());
assertEquals(expectedInServiceNodes, namesystem.getNumDatanodesInService());
assertEquals(expectedTotalLoad, namesystem.getTotalLoad());
assertEquals((double)expectedInServiceLoad/expectedInServiceLoad,
namesystem.getInServiceXceiverAverage(), EPSILON);
checkClusterHealth(nodes, namesystem, expectedTotalLoad, expectedInServiceNodes, expectedInServiceLoad);
// create streams and hsync to force datastreamers to start
DFSOutputStream[] streams = new DFSOutputStream[fileCount];
@ -239,12 +231,7 @@ public class TestNamenodeCapacityReport {
}
// force nodes to send load update
triggerHeartbeats(datanodes);
assertEquals(nodes, namesystem.getNumLiveDataNodes());
assertEquals(expectedInServiceNodes,
namesystem.getNumDatanodesInService());
assertEquals(expectedTotalLoad, namesystem.getTotalLoad());
assertEquals((double)expectedInServiceLoad/expectedInServiceNodes,
namesystem.getInServiceXceiverAverage(), EPSILON);
checkClusterHealth(nodes, namesystem, expectedTotalLoad, expectedInServiceNodes, expectedInServiceLoad);
// decomm a few nodes, substract their load from the expected load,
// trigger heartbeat to force load update
@ -256,12 +243,7 @@ public class TestNamenodeCapacityReport {
dnm.startDecommission(dnd);
DataNodeTestUtils.triggerHeartbeat(datanodes.get(i));
Thread.sleep(100);
assertEquals(nodes, namesystem.getNumLiveDataNodes());
assertEquals(expectedInServiceNodes,
namesystem.getNumDatanodesInService());
assertEquals(expectedTotalLoad, namesystem.getTotalLoad());
assertEquals((double)expectedInServiceLoad/expectedInServiceNodes,
namesystem.getInServiceXceiverAverage(), EPSILON);
checkClusterHealth(nodes, namesystem, expectedTotalLoad, expectedInServiceNodes, expectedInServiceLoad);
}
// check expected load while closing each stream. recalc expected
@ -289,12 +271,7 @@ public class TestNamenodeCapacityReport {
}
triggerHeartbeats(datanodes);
// verify node count and loads
assertEquals(nodes, namesystem.getNumLiveDataNodes());
assertEquals(expectedInServiceNodes,
namesystem.getNumDatanodesInService());
assertEquals(expectedTotalLoad, namesystem.getTotalLoad());
assertEquals((double)expectedInServiceLoad/expectedInServiceNodes,
namesystem.getInServiceXceiverAverage(), EPSILON);
checkClusterHealth(nodes, namesystem, expectedTotalLoad, expectedInServiceNodes, expectedInServiceLoad);
}
// shutdown each node, verify node counts based on decomm state
@ -310,19 +287,16 @@ public class TestNamenodeCapacityReport {
if (i >= fileRepl) {
expectedInServiceNodes--;
}
assertEquals(expectedInServiceNodes, namesystem.getNumDatanodesInService());
assertEquals(expectedInServiceNodes, getNumDNInService(namesystem));
// live nodes always report load of 1. no nodes is load 0
double expectedXceiverAvg = (i == nodes-1) ? 0.0 : 1.0;
assertEquals((double)expectedXceiverAvg,
namesystem.getInServiceXceiverAverage(), EPSILON);
getInServiceXceiverAverage(namesystem), EPSILON);
}
// final sanity check
assertEquals(0, namesystem.getNumLiveDataNodes());
assertEquals(0, namesystem.getNumDatanodesInService());
assertEquals(0.0, namesystem.getTotalLoad(), EPSILON);
assertEquals(0.0, namesystem.getInServiceXceiverAverage(), EPSILON);
checkClusterHealth(0, namesystem, 0.0, 0, 0.0);
} finally {
if (cluster != null) {
cluster.shutdown();
@ -330,6 +304,32 @@ public class TestNamenodeCapacityReport {
}
}
private static void checkClusterHealth(
int numOfLiveNodes,
FSNamesystem namesystem, double expectedTotalLoad,
int expectedInServiceNodes, double expectedInServiceLoad) {
assertEquals(numOfLiveNodes, namesystem.getNumLiveDataNodes());
assertEquals(expectedInServiceNodes, getNumDNInService(namesystem));
assertEquals(expectedTotalLoad, namesystem.getTotalLoad(), EPSILON);
if (expectedInServiceNodes != 0) {
assertEquals(expectedInServiceLoad / expectedInServiceNodes,
getInServiceXceiverAverage(namesystem), EPSILON);
} else {
assertEquals(0.0, getInServiceXceiverAverage(namesystem), EPSILON);
}
}
private static int getNumDNInService(FSNamesystem fsn) {
return fsn.getBlockManager().getDatanodeManager().getFSClusterStats()
.getNumDatanodesInService();
}
private static double getInServiceXceiverAverage(FSNamesystem fsn) {
return fsn.getBlockManager().getDatanodeManager().getFSClusterStats()
.getInServiceXceiverAverage();
}
private void triggerHeartbeats(List<DataNode> datanodes)
throws IOException, InterruptedException {
for (DataNode dn : datanodes) {