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HDFS-16566 Erasure Coding: Recovery may causes excess replicas when busy DN exsits (#4252)

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RuinanGu 2022-07-16 04:52:12 +08:00 committed by GitHub
parent 2835174a4c
commit 9376b65989
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14 changed files with 167 additions and 22 deletions
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1
hadoop-hdfs-project/hadoop-hdfs-client/src/main/proto/erasurecoding.proto
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@ -108,6 +108,7 @@ message BlockECReconstructionInfoProto {
required StorageTypesProto targetStorageTypes = 5;
required bytes liveBlockIndices = 6;
required ErasureCodingPolicyProto ecPolicy = 7;
optional bytes excludeReconstructedIndices = 8;
}
/**

14
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocolPB/PBHelper.java
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@ -1049,11 +1049,17 @@ public class PBHelper {
byte[] liveBlkIndices = blockEcReconstructionInfoProto.getLiveBlockIndices()
.toByteArray();
byte[] excludeReconstructedIndices =
blockEcReconstructionInfoProto.hasExcludeReconstructedIndices() ?
blockEcReconstructionInfoProto.getExcludeReconstructedIndices()
.toByteArray() : new byte[0];
ErasureCodingPolicy ecPolicy =
PBHelperClient.convertErasureCodingPolicy(
blockEcReconstructionInfoProto.getEcPolicy());
return new BlockECReconstructionInfo(block, sourceDnInfos, targetDnInfos,
targetStorageUuids, convertStorageTypes, liveBlkIndices, ecPolicy);
return new BlockECReconstructionInfo(
block, sourceDnInfos, targetDnInfos,
targetStorageUuids, convertStorageTypes, liveBlkIndices,
excludeReconstructedIndices, ecPolicy);
}
public static BlockECReconstructionInfoProto convertBlockECRecoveryInfo(
@ -1079,6 +1085,10 @@ public class PBHelper {
byte[] liveBlockIndices = blockEcRecoveryInfo.getLiveBlockIndices();
builder.setLiveBlockIndices(PBHelperClient.getByteString(liveBlockIndices));
byte[] excludeReconstructedIndices = blockEcRecoveryInfo.getExcludeReconstructedIndices();
builder.setExcludeReconstructedIndices(
PBHelperClient.getByteString(excludeReconstructedIndices));
builder.setEcPolicy(PBHelperClient.convertErasureCodingPolicy(
blockEcRecoveryInfo.getErasureCodingPolicy()));

17
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManager.java
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@ -949,7 +949,7 @@ public class BlockManager implements BlockStatsMXBean {
// source node returned is not used
chooseSourceDatanodes(blockInfo, containingNodes,
containingLiveReplicasNodes, numReplicas, new ArrayList<Byte>(),
new ArrayList<Byte>(), LowRedundancyBlocks.LEVEL);
new ArrayList<Byte>(), new ArrayList<Byte>(), LowRedundancyBlocks.LEVEL);
// containingLiveReplicasNodes can include READ_ONLY_SHARED replicas which are
// not included in the numReplicas.liveReplicas() count
@ -2195,9 +2195,10 @@ public class BlockManager implements BlockStatsMXBean {
NumberReplicas numReplicas = new NumberReplicas();
List<Byte> liveBlockIndices = new ArrayList<>();
List<Byte> liveBusyBlockIndices = new ArrayList<>();
List<Byte> excludeReconstructed = new ArrayList<>();
final DatanodeDescriptor[] srcNodes = chooseSourceDatanodes(block,
containingNodes, liveReplicaNodes, numReplicas,
liveBlockIndices, liveBusyBlockIndices, priority);
liveBlockIndices, liveBusyBlockIndices, excludeReconstructed, priority);
short requiredRedundancy = getExpectedLiveRedundancyNum(block,
numReplicas);
if(srcNodes == null || srcNodes.length == 0) {
@ -2267,9 +2268,13 @@ public class BlockManager implements BlockStatsMXBean {
for (int i = 0; i < liveBusyBlockIndices.size(); i++) {
busyIndices[i] = liveBusyBlockIndices.get(i);
}
byte[] excludeReconstructedIndices = new byte[excludeReconstructed.size()];
for (int i = 0; i < excludeReconstructed.size(); i++) {
excludeReconstructedIndices[i] = excludeReconstructed.get(i);
}
return new ErasureCodingWork(getBlockPoolId(), block, bc, newSrcNodes,
containingNodes, liveReplicaNodes, additionalReplRequired,
priority, newIndices, busyIndices);
priority, newIndices, busyIndices, excludeReconstructedIndices);
} else {
return new ReplicationWork(block, bc, srcNodes,
containingNodes, liveReplicaNodes, additionalReplRequired,
@ -2517,7 +2522,7 @@ public class BlockManager implements BlockStatsMXBean {
List<DatanodeDescriptor> containingNodes,
List<DatanodeStorageInfo> nodesContainingLiveReplicas,
NumberReplicas numReplicas, List<Byte> liveBlockIndices,
List<Byte> liveBusyBlockIndices, int priority) {
List<Byte> liveBusyBlockIndices, List<Byte> excludeReconstructed, int priority) {
containingNodes.clear();
nodesContainingLiveReplicas.clear();
List<DatanodeDescriptor> srcNodes = new ArrayList<>();
@ -2587,6 +2592,8 @@ public class BlockManager implements BlockStatsMXBean {
if (isStriped && (state == StoredReplicaState.LIVE
|| state == StoredReplicaState.DECOMMISSIONING)) {
liveBusyBlockIndices.add(blockIndex);
//HDFS-16566 ExcludeReconstructed won't be reconstructed.
excludeReconstructed.add(blockIndex);
}
continue; // already reached replication limit
}
@ -2595,6 +2602,8 @@ public class BlockManager implements BlockStatsMXBean {
if (isStriped && (state == StoredReplicaState.LIVE
|| state == StoredReplicaState.DECOMMISSIONING)) {
liveBusyBlockIndices.add(blockIndex);
//HDFS-16566 ExcludeReconstructed won't be reconstructed.
excludeReconstructed.add(blockIndex);
}
continue;
}

4
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeDescriptor.java
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@ -683,10 +683,10 @@ public class DatanodeDescriptor extends DatanodeInfo {
*/
void addBlockToBeErasureCoded(ExtendedBlock block,
DatanodeDescriptor[] sources, DatanodeStorageInfo[] targets,
byte[] liveBlockIndices, ErasureCodingPolicy ecPolicy) {
byte[] liveBlockIndices, byte[] excludeReconstrutedIndices, ErasureCodingPolicy ecPolicy) {
assert (block != null && sources != null && sources.length > 0);
BlockECReconstructionInfo task = new BlockECReconstructionInfo(block,
sources, targets, liveBlockIndices, ecPolicy);
sources, targets, liveBlockIndices, excludeReconstrutedIndices, ecPolicy);
erasurecodeBlocks.offer(task);
BlockManager.LOG.debug("Adding block reconstruction task " + task + "to "
+ getName() + ", current queue size is " + erasurecodeBlocks.size());

7
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/ErasureCodingWork.java
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@ -32,6 +32,7 @@ import java.util.Set;
class ErasureCodingWork extends BlockReconstructionWork {
private final byte[] liveBlockIndices;
private final byte[] liveBusyBlockIndices;
private final byte[] excludeReconstructedIndices;
private final String blockPoolId;
public ErasureCodingWork(String blockPoolId, BlockInfo block,
@ -40,12 +41,14 @@ class ErasureCodingWork extends BlockReconstructionWork {
List<DatanodeDescriptor> containingNodes,
List<DatanodeStorageInfo> liveReplicaStorages,
int additionalReplRequired, int priority,
byte[] liveBlockIndices, byte[] liveBusyBlockIndices) {
byte[] liveBlockIndices, byte[] liveBusyBlockIndices,
byte[] excludeReconstrutedIndices) {
super(block, bc, srcNodes, containingNodes,
liveReplicaStorages, additionalReplRequired, priority);
this.blockPoolId = blockPoolId;
this.liveBlockIndices = liveBlockIndices;
this.liveBusyBlockIndices = liveBusyBlockIndices;
this.excludeReconstructedIndices=excludeReconstrutedIndices;
LOG.debug("Creating an ErasureCodingWork to {} reconstruct ",
block);
}
@ -147,7 +150,7 @@ class ErasureCodingWork extends BlockReconstructionWork {
} else {
targets[0].getDatanodeDescriptor().addBlockToBeErasureCoded(
new ExtendedBlock(blockPoolId, stripedBlk), getSrcNodes(), targets,
getLiveBlockIndices(), stripedBlk.getErasureCodingPolicy());
liveBlockIndices, excludeReconstructedIndices, stripedBlk.getErasureCodingPolicy());
}
}

2
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/erasurecode/ErasureCodingWorker.java
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@ -127,7 +127,7 @@ public final class ErasureCodingWorker {
reconInfo.getExtendedBlock(), reconInfo.getErasureCodingPolicy(),
reconInfo.getLiveBlockIndices(), reconInfo.getSourceDnInfos(),
reconInfo.getTargetDnInfos(), reconInfo.getTargetStorageTypes(),
reconInfo.getTargetStorageIDs());
reconInfo.getTargetStorageIDs(), reconInfo.getExcludeReconstructedIndices());
// It may throw IllegalArgumentException from task#stripedReader
// constructor.
final StripedBlockReconstructor task =

15
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/erasurecode/StripedReconstructionInfo.java
View File

@ -41,26 +41,28 @@ public class StripedReconstructionInfo {
private final DatanodeInfo[] targets;
private final StorageType[] targetStorageTypes;
private final String[] targetStorageIds;
private final byte[] excludeReconstructedIndices;
public StripedReconstructionInfo(ExtendedBlock blockGroup,
ErasureCodingPolicy ecPolicy, byte[] liveIndices, DatanodeInfo[] sources,
byte[] targetIndices) {
this(blockGroup, ecPolicy, liveIndices, sources, targetIndices, null,
null, null);
null, null, new byte[0]);
}
StripedReconstructionInfo(ExtendedBlock blockGroup,
ErasureCodingPolicy ecPolicy, byte[] liveIndices, DatanodeInfo[] sources,
DatanodeInfo[] targets, StorageType[] targetStorageTypes,
String[] targetStorageIds) {
String[] targetStorageIds, byte[] excludeReconstructedIndices) {
this(blockGroup, ecPolicy, liveIndices, sources, null, targets,
targetStorageTypes, targetStorageIds);
targetStorageTypes, targetStorageIds, excludeReconstructedIndices);
}
private StripedReconstructionInfo(ExtendedBlock blockGroup,
ErasureCodingPolicy ecPolicy, byte[] liveIndices, DatanodeInfo[] sources,
byte[] targetIndices, DatanodeInfo[] targets,
StorageType[] targetStorageTypes, String[] targetStorageIds) {
StorageType[] targetStorageTypes, String[] targetStorageIds,
byte[] excludeReconstructedIndices) {
this.blockGroup = blockGroup;
this.ecPolicy = ecPolicy;
@ -70,6 +72,7 @@ public class StripedReconstructionInfo {
this.targets = targets;
this.targetStorageTypes = targetStorageTypes;
this.targetStorageIds = targetStorageIds;
this.excludeReconstructedIndices = excludeReconstructedIndices;
}
ExtendedBlock getBlockGroup() {
@ -104,5 +107,9 @@ public class StripedReconstructionInfo {
return targetStorageIds;
}
byte[] getExcludeReconstructedIndices() {
return excludeReconstructedIndices;
}
}

11
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/erasurecode/StripedReconstructor.java
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@ -120,6 +120,7 @@ abstract class StripedReconstructor {
private final CachingStrategy cachingStrategy;
private long maxTargetLength = 0L;
private final BitSet liveBitSet;
private final BitSet excludeBitSet;
// metrics
private AtomicLong bytesRead = new AtomicLong(0);
@ -137,6 +138,12 @@ abstract class StripedReconstructor {
for (int i = 0; i < stripedReconInfo.getLiveIndices().length; i++) {
liveBitSet.set(stripedReconInfo.getLiveIndices()[i]);
}
excludeBitSet = new BitSet(
ecPolicy.getNumDataUnits() + ecPolicy.getNumParityUnits());
for (int i = 0; i < stripedReconInfo.getExcludeReconstructedIndices().length; i++) {
excludeBitSet.set(stripedReconInfo.getExcludeReconstructedIndices()[i]);
}
blockGroup = stripedReconInfo.getBlockGroup();
stripedReader = new StripedReader(this, datanode, conf, stripedReconInfo);
cachingStrategy = CachingStrategy.newDefaultStrategy();
@ -261,6 +268,10 @@ abstract class StripedReconstructor {
return liveBitSet;
}
BitSet getExcludeBitSet(){
return excludeBitSet;
}
long getMaxTargetLength() {
return maxTargetLength;
}

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

@ -123,13 +123,14 @@ class StripedWriter {
private void initTargetIndices() {
BitSet bitset = reconstructor.getLiveBitSet();
BitSet excludebitset=reconstructor.getExcludeBitSet();
int m = 0;
hasValidTargets = false;
for (int i = 0; i < dataBlkNum + parityBlkNum; i++) {
if (!bitset.get(i)) {
if (reconstructor.getBlockLen(i) > 0) {
if (m < targets.length) {
if (m < targets.length && !excludebitset.get(i)) {
targetIndices[m++] = (short)i;
hasValidTargets = true;
}

13
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/protocol/BlockECReconstructionCommand.java
View File

@ -78,21 +78,23 @@ public class BlockECReconstructionCommand extends DatanodeCommand {
private String[] targetStorageIDs;
private StorageType[] targetStorageTypes;
private final byte[] liveBlockIndices;
private final byte[] excludeReconstructedIndices;
private final ErasureCodingPolicy ecPolicy;
public BlockECReconstructionInfo(ExtendedBlock block,
DatanodeInfo[] sources, DatanodeStorageInfo[] targetDnStorageInfo,
byte[] liveBlockIndices, ErasureCodingPolicy ecPolicy) {
byte[] liveBlockIndices, byte[] excludeReconstructedIndices, ErasureCodingPolicy ecPolicy) {
this(block, sources, DatanodeStorageInfo
.toDatanodeInfos(targetDnStorageInfo), DatanodeStorageInfo
.toStorageIDs(targetDnStorageInfo), DatanodeStorageInfo
.toStorageTypes(targetDnStorageInfo), liveBlockIndices, ecPolicy);
.toStorageTypes(targetDnStorageInfo), liveBlockIndices,
excludeReconstructedIndices, ecPolicy);
}
public BlockECReconstructionInfo(ExtendedBlock block,
DatanodeInfo[] sources, DatanodeInfo[] targets,
String[] targetStorageIDs, StorageType[] targetStorageTypes,
byte[] liveBlockIndices, ErasureCodingPolicy ecPolicy) {
byte[] liveBlockIndices, byte[] excludeReconstructedIndices, ErasureCodingPolicy ecPolicy) {
this.block = block;
this.sources = sources;
this.targets = targets;
@ -100,6 +102,7 @@ public class BlockECReconstructionCommand extends DatanodeCommand {
this.targetStorageTypes = targetStorageTypes;
this.liveBlockIndices = liveBlockIndices == null ?
new byte[]{} : liveBlockIndices;
this.excludeReconstructedIndices = excludeReconstructedIndices;
this.ecPolicy = ecPolicy;
}
@ -127,6 +130,10 @@ public class BlockECReconstructionCommand extends DatanodeCommand {
return liveBlockIndices;
}
public byte[] getExcludeReconstructedIndices() {
return excludeReconstructedIndices;
}
public ErasureCodingPolicy getErasureCodingPolicy() {
return ecPolicy;
}

2
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestReconstructStripedFile.java
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@ -472,7 +472,7 @@ public class TestReconstructStripedFile {
BlockECReconstructionInfo invalidECInfo = new BlockECReconstructionInfo(
new ExtendedBlock("bp-id", 123456), dataDNs, dnStorageInfo, liveIndices,
ecPolicy);
new byte[0], ecPolicy);
List<BlockECReconstructionInfo> ecTasks = new ArrayList<>();
ecTasks.add(invalidECInfo);
dataNode.getErasureCodingWorker().processErasureCodingTasks(ecTasks);

6
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/protocolPB/TestPBHelper.java
View File

@ -749,9 +749,10 @@ public class TestPBHelper {
DatanodeStorageInfo[] targetDnInfos0 = new DatanodeStorageInfo[] {
targetDnInfos_0, targetDnInfos_1 };
byte[] liveBlkIndices0 = new byte[2];
byte[] excludeReconstructedIndices0=new byte[2];
BlockECReconstructionInfo blkECRecoveryInfo0 = new BlockECReconstructionInfo(
new ExtendedBlock("bp1", 1234), dnInfos0, targetDnInfos0,
liveBlkIndices0, StripedFileTestUtil.getDefaultECPolicy());
liveBlkIndices0, excludeReconstructedIndices0, StripedFileTestUtil.getDefaultECPolicy());
DatanodeInfo[] dnInfos1 = new DatanodeInfo[] {
DFSTestUtil.getLocalDatanodeInfo(), DFSTestUtil.getLocalDatanodeInfo() };
DatanodeStorageInfo targetDnInfos_2 = BlockManagerTestUtil
@ -763,9 +764,10 @@ public class TestPBHelper {
DatanodeStorageInfo[] targetDnInfos1 = new DatanodeStorageInfo[] {
targetDnInfos_2, targetDnInfos_3 };
byte[] liveBlkIndices1 = new byte[2];
byte[] excludeReconstructedIndices = new byte[2];
BlockECReconstructionInfo blkECRecoveryInfo1 = new BlockECReconstructionInfo(
new ExtendedBlock("bp2", 3256), dnInfos1, targetDnInfos1,
liveBlkIndices1, StripedFileTestUtil.getDefaultECPolicy());
liveBlkIndices1, excludeReconstructedIndices, StripedFileTestUtil.getDefaultECPolicy());
List<BlockECReconstructionInfo> blkRecoveryInfosList = new ArrayList<BlockECReconstructionInfo>();
blkRecoveryInfosList.add(blkECRecoveryInfo0);
blkRecoveryInfosList.add(blkECRecoveryInfo1);

9
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestBlockManager.java
View File

@ -700,6 +700,7 @@ public class TestBlockManager {
new NumberReplicas(),
new ArrayList<Byte>(),
new ArrayList<Byte>(),
new ArrayList<Byte>(),
LowRedundancyBlocks.QUEUE_HIGHEST_PRIORITY)[0]);
assertEquals("Does not choose a source node for a less-than-highest-priority"
@ -712,6 +713,7 @@ public class TestBlockManager {
new NumberReplicas(),
new ArrayList<Byte>(),
new ArrayList<Byte>(),
new ArrayList<Byte>(),
LowRedundancyBlocks.QUEUE_VERY_LOW_REDUNDANCY).length);
// Increase the replication count to test replication count > hard limit
@ -727,6 +729,7 @@ public class TestBlockManager {
new NumberReplicas(),
new ArrayList<Byte>(),
new ArrayList<Byte>(),
new ArrayList<Byte>(),
LowRedundancyBlocks.QUEUE_HIGHEST_PRIORITY).length);
}
@ -773,6 +776,7 @@ public class TestBlockManager {
NumberReplicas numReplicas = new NumberReplicas();
List<Byte> liveBlockIndices = new ArrayList<>();
List<Byte> liveBusyBlockIndices = new ArrayList<>();
List<Byte> excludeReconstructedIndices = new ArrayList<>();
bm.chooseSourceDatanodes(
aBlockInfoStriped,
@ -780,6 +784,7 @@ public class TestBlockManager {
liveNodes,
numReplicas, liveBlockIndices,
liveBusyBlockIndices,
excludeReconstructedIndices,
LowRedundancyBlocks.QUEUE_VERY_LOW_REDUNDANCY);
assertEquals("Choose the source node for reconstruction with one node reach"
@ -836,6 +841,7 @@ public class TestBlockManager {
NumberReplicas numReplicas = new NumberReplicas();
List<Byte> liveBlockIndices = new ArrayList<>();
List<Byte> liveBusyBlockIndices = new ArrayList<>();
List<Byte> excludeReconstructedIndices = new ArrayList<>();
bm.chooseSourceDatanodes(
aBlockInfoStriped,
@ -843,6 +849,7 @@ public class TestBlockManager {
nodesContainingLiveReplicas,
numReplicas, liveBlockIndices,
liveBusyBlockIndices,
excludeReconstructedIndices,
LowRedundancyBlocks.QUEUE_HIGHEST_PRIORITY);
assertEquals("There are 5 live replicas in " +
"[ds2, ds3, ds4, ds5, ds6] datanodes ",
@ -975,6 +982,7 @@ public class TestBlockManager {
new NumberReplicas(),
new LinkedList<Byte>(),
new ArrayList<Byte>(),
new ArrayList<Byte>(),
LowRedundancyBlocks.QUEUE_LOW_REDUNDANCY)[0]);
@ -991,6 +999,7 @@ public class TestBlockManager {
new NumberReplicas(),
new LinkedList<Byte>(),
new ArrayList<Byte>(),
new ArrayList<Byte>(),
LowRedundancyBlocks.QUEUE_LOW_REDUNDANCY).length);
}

85
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestReconstructStripedBlocks.java
View File

@ -25,6 +25,7 @@ import org.apache.hadoop.hdfs.DistributedFileSystem;
import org.apache.hadoop.hdfs.HdfsConfiguration;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.StripedFileTestUtil;
import org.apache.hadoop.hdfs.client.HdfsDataInputStream;
import org.apache.hadoop.hdfs.protocol.Block;
import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
import org.apache.hadoop.hdfs.protocol.ErasureCodingPolicy;
@ -45,6 +46,7 @@ import org.apache.hadoop.hdfs.server.datanode.DataNodeTestUtils;
import org.apache.hadoop.hdfs.server.protocol.BlockECReconstructionCommand.BlockECReconstructionInfo;
import org.apache.hadoop.hdfs.util.StripedBlockUtil;
import org.apache.hadoop.test.GenericTestUtils;
import org.junit.Assert;
import org.junit.Test;
import org.slf4j.Logger;
@ -84,6 +86,7 @@ public class TestReconstructStripedBlocks {
// chooseUnderReplicatedBlocks at once.
conf.setInt(
DFSConfigKeys.DFS_NAMENODE_REPLICATION_WORK_MULTIPLIER_PER_ITERATION, 5);
}
@Test
@ -430,4 +433,86 @@ public class TestReconstructStripedBlocks {
dfsCluster.shutdown();
}
}
private byte[] writeStripedFile(DistributedFileSystem fs, Path ecFile,
int writeBytes) throws Exception {
byte[] bytes = StripedFileTestUtil.generateBytes(writeBytes);
DFSTestUtil.writeFile(fs, ecFile, new String(bytes));
StripedFileTestUtil.waitBlockGroupsReported(fs, ecFile.toString());
return bytes;
}
@Test
public void testReconstrutionWithBusyBlock1() throws Exception {
//When the index of busy block is smaller than the missing block
//[0(busy),1(busy),3,4,5,6,7,8]
int busyNodeIndex1 = 0;
int busyNodeIndex2 = 1;
int deadNodeIndex = 2;
final Path ecDir = new Path(GenericTestUtils.getRandomizedTempPath());
final Path ecFile = new Path(ecDir, "testReconstrutionWithBusyBlock1");
int writeBytes = cellSize * dataBlocks;
HdfsConfiguration conf = new HdfsConfiguration();
initConf(conf);
conf.setBoolean(DFSConfigKeys.DFS_DISK_BALANCER_ENABLED, false);
conf.setInt(DFSConfigKeys.DFS_NAMENODE_HEARTBEAT_RECHECK_INTERVAL_KEY,
2000);
conf.setInt(DFSConfigKeys.DFS_HEARTBEAT_INTERVAL_KEY, 1);
conf.setInt(DFSConfigKeys.DFS_NAMENODE_REDUNDANCY_INTERVAL_SECONDS_KEY, 1);
conf.setInt(DFSConfigKeys.DFS_BLOCKREPORT_INTERVAL_MSEC_KEY,
1000);
conf.setInt(DFSConfigKeys.DFS_NAMENODE_RECONSTRUCTION_PENDING_TIMEOUT_SEC_KEY,
4);
conf.setInt(DFSConfigKeys.DFS_NAMENODE_REDUNDANCY_INTERVAL_SECONDS_KEY,
1);
cluster = new MiniDFSCluster.Builder(conf).numDataNodes(groupSize + 5)
.build();
cluster.waitActive();
DistributedFileSystem dfs = cluster.getFileSystem(0);
dfs.enableErasureCodingPolicy(
StripedFileTestUtil.getDefaultECPolicy().getName());
dfs.mkdirs(ecDir);
dfs.setErasureCodingPolicy(ecDir,
StripedFileTestUtil.getDefaultECPolicy().getName());
byte[] originBytesArray = writeStripedFile(dfs, ecFile, writeBytes);
List<LocatedBlock> lbs = ((HdfsDataInputStream) dfs.open(ecFile))
.getAllBlocks();
LocatedStripedBlock lsb = (LocatedStripedBlock) lbs.get(0);
DatanodeInfo[] dnList = lsb.getLocations();
BlockManager bm = cluster.getNamesystem().getBlockManager();
BlockInfoStriped blockInfo =
(BlockInfoStriped) bm.getStoredBlock(
new Block(lsb.getBlock().getBlockId()));
//1.Make nodes busy
DatanodeDescriptor busyNode = bm.getDatanodeManager()
.getDatanode(dnList[busyNodeIndex1].getDatanodeUuid());
for (int j = 0; j < maxReplicationStreams; j++) {
busyNode.incrementPendingReplicationWithoutTargets();
}
DatanodeDescriptor busyNode2 = bm.getDatanodeManager()
.getDatanode(dnList[busyNodeIndex2].getDatanodeUuid());
for (int j = 0; j < maxReplicationStreams; j++) {
busyNode2.incrementPendingReplicationWithoutTargets();
}
//2.Make a node missing
DataNode dn = cluster.getDataNode(dnList[deadNodeIndex].getIpcPort());
cluster.stopDataNode(dnList[deadNodeIndex].getXferAddr());
cluster.setDataNodeDead(dn.getDatanodeId());
//3.Whether there is excess replicas or not during the recovery?
assertEquals(8, bm.countNodes(blockInfo).liveReplicas());
GenericTestUtils.waitFor(
() -> {
return bm.countNodes(blockInfo).liveReplicas() == 9||
bm.countNodes(blockInfo).excessReplicas() >= 1||
bm.countNodes(blockInfo).redundantInternalBlocks() >= 1;
},
10, 100000);
assertEquals(0, bm.countNodes(blockInfo).excessReplicas());
assertEquals(9, bm.countNodes(blockInfo).liveReplicas());
}
}