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HDFS-7933. fsck should also report decommissioning replicas. Contributed by Xiaoyu Yao. 

(cherry picked from commit f8f5887209)
This commit is contained in:
cnauroth 2015-04-11 13:23:18 -07:00
parent 4801b0b478
commit 293c763e82
8 changed files with 192 additions and 39 deletions
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3
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -107,6 +107,9 @@ Release 2.8.0 - UNRELEASED
HdfsClientConfigKeys.Failover and fix typos in the dfs.http.client.*
configuration keys. (szetszwo)
HDFS-7933. fsck should also report decommissioning replicas.
(Xiaoyu Yao via cnauroth)
OPTIMIZATIONS
HDFS-8026. Trace FSOutputSummer#writeChecksumChunks rather than

39
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManager.java
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@ -539,7 +539,7 @@ public class BlockManager {
// not included in the numReplicas.liveReplicas() count
assert containingLiveReplicasNodes.size() >= numReplicas.liveReplicas();
int usableReplicas = numReplicas.liveReplicas() +
numReplicas.decommissionedReplicas();
numReplicas.decommissionedAndDecommissioning();
if (block instanceof BlockInfoContiguous) {
BlockCollection bc = ((BlockInfoContiguous) block).getBlockCollection();
@ -550,7 +550,7 @@ public class BlockManager {
out.print(block + ((usableReplicas > 0)? "" : " MISSING") +
" (replicas:" +
" l: " + numReplicas.liveReplicas() +
" d: " + numReplicas.decommissionedReplicas() +
" d: " + numReplicas.decommissionedAndDecommissioning() +
" c: " + numReplicas.corruptReplicas() +
" e: " + numReplicas.excessReplicas() + ") ");
@ -730,7 +730,7 @@ public class BlockManager {
// Remove block from replication queue.
NumberReplicas replicas = countNodes(ucBlock);
neededReplications.remove(ucBlock, replicas.liveReplicas(),
replicas.decommissionedReplicas(), getReplication(ucBlock));
replicas.decommissionedAndDecommissioning(), getReplication(ucBlock));
pendingReplications.remove(ucBlock);
// remove this block from the list of pending blocks to be deleted.
@ -1617,6 +1617,7 @@ public class BlockManager {
DatanodeDescriptor srcNode = null;
int live = 0;
int decommissioned = 0;
int decommissioning = 0;
int corrupt = 0;
int excess = 0;
@ -1628,9 +1629,11 @@ public class BlockManager {
int countableReplica = storage.getState() == State.NORMAL ? 1 : 0;
if ((nodesCorrupt != null) && (nodesCorrupt.contains(node)))
corrupt += countableReplica;
else if (node.isDecommissionInProgress() || node.isDecommissioned())
else if (node.isDecommissionInProgress()) {
decommissioning += countableReplica;
} else if (node.isDecommissioned()) {
decommissioned += countableReplica;
else if (excessBlocks != null && excessBlocks.contains(block)) {
} else if (excessBlocks != null && excessBlocks.contains(block)) {
excess += countableReplica;
} else {
nodesContainingLiveReplicas.add(storage);
@ -1670,7 +1673,8 @@ public class BlockManager {
srcNode = node;
}
if(numReplicas != null)
numReplicas.initialize(live, decommissioned, corrupt, excess, 0);
numReplicas.initialize(live, decommissioned, decommissioning, corrupt,
excess, 0);
return srcNode;
}
@ -1689,7 +1693,7 @@ public class BlockManager {
num.liveReplicas())) {
neededReplications.add(timedOutItems[i],
num.liveReplicas(),
num.decommissionedReplicas(),
num.decommissionedAndDecommissioning(),
getReplication(timedOutItems[i]));
}
}
@ -2576,7 +2580,7 @@ public class BlockManager {
short fileReplication = bc.getBlockReplication();
if (!isNeededReplication(storedBlock, fileReplication, numCurrentReplica)) {
neededReplications.remove(storedBlock, numCurrentReplica,
num.decommissionedReplicas(), fileReplication);
num.decommissionedAndDecommissioning(), fileReplication);
} else {
updateNeededReplications(storedBlock, curReplicaDelta, 0);
}
@ -2810,7 +2814,7 @@ public class BlockManager {
// add to under-replicated queue if need to be
if (isNeededReplication(block, expectedReplication, numCurrentReplica)) {
if (neededReplications.add(block, numCurrentReplica, num
.decommissionedReplicas(), expectedReplication)) {
.decommissionedAndDecommissioning(), expectedReplication)) {
return MisReplicationResult.UNDER_REPLICATED;
}
}
@ -3224,6 +3228,7 @@ public class BlockManager {
*/
public NumberReplicas countNodes(Block b) {
int decommissioned = 0;
int decommissioning = 0;
int live = 0;
int corrupt = 0;
int excess = 0;
@ -3233,7 +3238,9 @@ public class BlockManager {
final DatanodeDescriptor node = storage.getDatanodeDescriptor();
if ((nodesCorrupt != null) && (nodesCorrupt.contains(node))) {
corrupt++;
} else if (node.isDecommissionInProgress() || node.isDecommissioned()) {
} else if (node.isDecommissionInProgress()) {
decommissioning++;
} else if (node.isDecommissioned()) {
decommissioned++;
} else {
LightWeightLinkedSet<Block> blocksExcess = excessReplicateMap.get(node
@ -3248,7 +3255,7 @@ public class BlockManager {
stale++;
}
}
return new NumberReplicas(live, decommissioned, corrupt, excess, stale);
return new NumberReplicas(live, decommissioned, decommissioning, corrupt, excess, stale);
}
/**
@ -3385,13 +3392,13 @@ public class BlockManager {
int curExpectedReplicas = getReplication(block);
if (isNeededReplication(block, curExpectedReplicas, repl.liveReplicas())) {
neededReplications.update(block, repl.liveReplicas(), repl
.decommissionedReplicas(), curExpectedReplicas, curReplicasDelta,
expectedReplicasDelta);
.decommissionedAndDecommissioning(), curExpectedReplicas,
curReplicasDelta, expectedReplicasDelta);
} else {
int oldReplicas = repl.liveReplicas()-curReplicasDelta;
int oldExpectedReplicas = curExpectedReplicas-expectedReplicasDelta;
neededReplications.remove(block, oldReplicas, repl.decommissionedReplicas(),
oldExpectedReplicas);
neededReplications.remove(block, oldReplicas,
repl.decommissionedAndDecommissioning(), oldExpectedReplicas);
}
} finally {
namesystem.writeUnlock();
@ -3410,7 +3417,7 @@ public class BlockManager {
final NumberReplicas n = countNodes(block);
if (isNeededReplication(block, expected, n.liveReplicas())) {
neededReplications.add(block, n.liveReplicas(),
n.decommissionedReplicas(), expected);
n.decommissionedAndDecommissioning(), expected);
} else if (n.liveReplicas() > expected) {
processOverReplicatedBlock(block, expected, null, null);
}

7
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DecommissionManager.java
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@ -298,7 +298,8 @@ public class DecommissionManager {
LOG.info("Block: " + block + ", Expected Replicas: "
+ curExpectedReplicas + ", live replicas: " + curReplicas
+ ", corrupt replicas: " + num.corruptReplicas()
+ ", decommissioned replicas: " + num.decommissionedReplicas()
+ ", decommissioned replicas: " + num.decommissioned()
+ ", decommissioning replicas: " + num.decommissioning()
+ ", excess replicas: " + num.excessReplicas()
+ ", Is Open File: " + bc.isUnderConstruction()
+ ", Datanodes having this block: " + nodeList + ", Current Datanode: "
@ -571,7 +572,7 @@ public class DecommissionManager {
// Process these blocks only when active NN is out of safe mode.
blockManager.neededReplications.add(block,
curReplicas,
num.decommissionedReplicas(),
num.decommissionedAndDecommissioning(),
bc.getBlockReplication());
}
}
@ -600,7 +601,7 @@ public class DecommissionManager {
if (bc.isUnderConstruction()) {
underReplicatedInOpenFiles++;
}
if ((curReplicas == 0) && (num.decommissionedReplicas() > 0)) {
if ((curReplicas == 0) && (num.decommissionedAndDecommissioning() > 0)) {
decommissionOnlyReplicas++;
}
}

57
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/NumberReplicas.java
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@ -19,26 +19,33 @@ package org.apache.hadoop.hdfs.server.blockmanagement;
/**
* A immutable object that stores the number of live replicas and
* the number of decommissined Replicas.
* the number of decommissioned Replicas.
*/
public class NumberReplicas {
private int liveReplicas;
private int decommissionedReplicas;
// Tracks only the decommissioning replicas
private int decommissioning;
// Tracks only the decommissioned replicas
private int decommissioned;
private int corruptReplicas;
private int excessReplicas;
private int replicasOnStaleNodes;
NumberReplicas() {
initialize(0, 0, 0, 0, 0);
initialize(0, 0, 0, 0, 0, 0);
}
NumberReplicas(int live, int decommissioned, int corrupt, int excess, int stale) {
initialize(live, decommissioned, corrupt, excess, stale);
NumberReplicas(int live, int decommissioned, int decommissioning, int corrupt,
int excess, int stale) {
initialize(live, decommissioned, decommissioning, corrupt, excess, stale);
}
void initialize(int live, int decommissioned, int corrupt, int excess, int stale) {
void initialize(int live, int decommissioned, int decommissioning,
int corrupt, int excess, int stale) {
liveReplicas = live;
decommissionedReplicas = decommissioned;
this.decommissioning = decommissioning;
this.decommissioned = decommissioned;
corruptReplicas = corrupt;
excessReplicas = excess;
replicasOnStaleNodes = stale;
@ -47,12 +54,46 @@ public class NumberReplicas {
public int liveReplicas() {
return liveReplicas;
}
/**
*
* @return decommissioned replicas + decommissioning replicas
* It is deprecated by decommissionedAndDecommissioning
* due to its misleading name.
*/
@Deprecated
public int decommissionedReplicas() {
return decommissionedReplicas;
return decommissionedAndDecommissioning();
}
/**
*
* @return decommissioned and decommissioning replicas
*/
public int decommissionedAndDecommissioning() {
return decommissioned + decommissioning;
}
/**
*
* @return decommissioned replicas only
*/
public int decommissioned() {
return decommissioned;
}
/**
*
* @return decommissioning replicas only
*/
public int decommissioning() {
return decommissioning;
}
public int corruptReplicas() {
return corruptReplicas;
}
public int excessReplicas() {
return excessReplicas;
}

38
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NamenodeFsck.java
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@ -248,8 +248,10 @@ public class NamenodeFsck implements DataEncryptionKeyFactory {
out.println("No. of live Replica: " + numberReplicas.liveReplicas());
out.println("No. of excess Replica: " + numberReplicas.excessReplicas());
out.println("No. of stale Replica: " + numberReplicas.replicasOnStaleNodes());
out.println("No. of decommission Replica: "
+ numberReplicas.decommissionedReplicas());
out.println("No. of decommissioned Replica: "
+ numberReplicas.decommissioned());
out.println("No. of decommissioning Replica: "
+ numberReplicas.decommissioning());
out.println("No. of corrupted Replica: " + numberReplicas.corruptReplicas());
//record datanodes that have corrupted block replica
Collection<DatanodeDescriptor> corruptionRecord = null;
@ -504,10 +506,16 @@ public class NamenodeFsck implements DataEncryptionKeyFactory {
NumberReplicas numberReplicas =
namenode.getNamesystem().getBlockManager().countNodes(block.getLocalBlock());
int liveReplicas = numberReplicas.liveReplicas();
res.totalReplicas += liveReplicas;
int decommissionedReplicas = numberReplicas.decommissioned();;
int decommissioningReplicas = numberReplicas.decommissioning();
res.decommissionedReplicas += decommissionedReplicas;
res.decommissioningReplicas += decommissioningReplicas;
int totalReplicas = liveReplicas + decommissionedReplicas +
decommissioningReplicas;
res.totalReplicas += totalReplicas;
short targetFileReplication = file.getReplication();
res.numExpectedReplicas += targetFileReplication;
if(liveReplicas<minReplication){
if(totalReplicas < minReplication){
res.numUnderMinReplicatedBlocks++;
}
if (liveReplicas > targetFileReplication) {
@ -527,10 +535,10 @@ public class NamenodeFsck implements DataEncryptionKeyFactory {
out.print("\n" + path + ": CORRUPT blockpool " + block.getBlockPoolId() +
" block " + block.getBlockName()+"\n");
}
if (liveReplicas >= minReplication)
if (totalReplicas >= minReplication)
res.numMinReplicatedBlocks++;
if (liveReplicas < targetFileReplication && liveReplicas > 0) {
res.missingReplicas += (targetFileReplication - liveReplicas);
if (totalReplicas < targetFileReplication && totalReplicas > 0) {
res.missingReplicas += (targetFileReplication - totalReplicas);
res.numUnderReplicatedBlocks += 1;
underReplicatedPerFile++;
if (!showFiles) {
@ -539,7 +547,9 @@ public class NamenodeFsck implements DataEncryptionKeyFactory {
out.println(" Under replicated " + block +
". Target Replicas is " +
targetFileReplication + " but found " +
liveReplicas + " replica(s).");
liveReplicas + " live replica(s), " +
decommissionedReplicas + " decommissioned replica(s) and " +
decommissioningReplicas + " decommissioning replica(s).");
}
// verify block placement policy
BlockPlacementStatus blockPlacementStatus = bpPolicy
@ -556,7 +566,7 @@ public class NamenodeFsck implements DataEncryptionKeyFactory {
block + ". " + blockPlacementStatus.getErrorDescription());
}
report.append(i + ". " + blkName + " len=" + block.getNumBytes());
if (liveReplicas == 0) {
if (totalReplicas == 0) {
report.append(" MISSING!");
res.addMissing(block.toString(), block.getNumBytes());
missing++;
@ -856,6 +866,8 @@ public class NamenodeFsck implements DataEncryptionKeyFactory {
long corruptBlocks = 0L;
long excessiveReplicas = 0L;
long missingReplicas = 0L;
long decommissionedReplicas = 0L;
long decommissioningReplicas = 0L;
long numUnderMinReplicatedBlocks=0L;
long numOverReplicatedBlocks = 0L;
long numUnderReplicatedBlocks = 0L;
@ -990,6 +1002,14 @@ public class NamenodeFsck implements DataEncryptionKeyFactory {
((float) (missingReplicas * 100) / (float) numExpectedReplicas)).append(
" %)");
}
if (decommissionedReplicas > 0) {
res.append("\n DecommissionedReplicas:\t").append(
decommissionedReplicas);
}
if (decommissioningReplicas > 0) {
res.append("\n DecommissioningReplicas:\t").append(
decommissioningReplicas);
}
return res.toString();
}
}

2
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestClientReportBadBlock.java
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@ -192,7 +192,7 @@ public class TestClientReportBadBlock {
verifyFirstBlockCorrupted(filePath, false);
int expectedReplicaCount = repl-corruptBlocReplicas;
verifyCorruptedBlockCount(filePath, expectedReplicaCount);
verifyFsckHealth("Target Replicas is 3 but found 1 replica");
verifyFsckHealth("Target Replicas is 3 but found 1 live replica");
testFsckListCorruptFilesBlocks(filePath, 0);
}
}

2
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestReadOnlySharedStorage.java
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@ -192,7 +192,7 @@ public class TestReadOnlySharedStorage {
assertThat(numberReplicas.liveReplicas(), is(expectedReplicas));
assertThat(numberReplicas.excessReplicas(), is(0));
assertThat(numberReplicas.corruptReplicas(), is(0));
assertThat(numberReplicas.decommissionedReplicas(), is(0));
assertThat(numberReplicas.decommissionedAndDecommissioning(), is(0));
assertThat(numberReplicas.replicasOnStaleNodes(), is(0));
BlockManagerTestUtil.updateState(blockManager);

81
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestFsck.java
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@ -1464,4 +1464,85 @@ public class TestFsck {
}
}
}
/**
* Test for blocks on decommissioning hosts are not shown as missing
*/
@Test
public void testFsckWithDecommissionedReplicas() throws Exception {
final short REPL_FACTOR = 1;
short NUM_DN = 2;
final long blockSize = 512;
final long fileSize = 1024;
boolean checkDecommissionInProgress = false;
String [] racks = {"/rack1", "/rack2"};
String [] hosts = {"host1", "host2"};
Configuration conf = new Configuration();
conf.setLong(DFSConfigKeys.DFS_BLOCK_SIZE_KEY, blockSize);
conf.setInt(DFSConfigKeys.DFS_REPLICATION_KEY, 1);
MiniDFSCluster cluster;
DistributedFileSystem dfs ;
cluster =
new MiniDFSCluster.Builder(conf).numDataNodes(NUM_DN).hosts(hosts)
.racks(racks).build();
assertNotNull("Failed Cluster Creation", cluster);
cluster.waitClusterUp();
dfs = cluster.getFileSystem();
assertNotNull("Failed to get FileSystem", dfs);
DFSTestUtil util = new DFSTestUtil.Builder().
setName(getClass().getSimpleName()).setNumFiles(1).build();
//create files
final String testFile = new String("/testfile");
final Path path = new Path(testFile);
util.createFile(dfs, path, fileSize, REPL_FACTOR, 1000L);
util.waitReplication(dfs, path, REPL_FACTOR);
try {
// make sure datanode that has replica is fine before decommission
String outStr = runFsck(conf, 0, true, testFile);
System.out.println(outStr);
assertTrue(outStr.contains(NamenodeFsck.HEALTHY_STATUS));
// decommission datanode
ExtendedBlock eb = util.getFirstBlock(dfs, path);
DatanodeDescriptor dn = cluster.getNameNode().getNamesystem()
.getBlockManager().getBlockCollection(eb.getLocalBlock())
.getBlocks()[0].getDatanode(0);
cluster.getNameNode().getNamesystem().getBlockManager()
.getDatanodeManager().getDecomManager().startDecommission(dn);
String dnName = dn.getXferAddr();
// wait for decommission start
DatanodeInfo datanodeInfo = null;
int count = 0;
do {
Thread.sleep(2000);
for (DatanodeInfo info : dfs.getDataNodeStats()) {
if (dnName.equals(info.getXferAddr())) {
datanodeInfo = info;
}
}
// check the replica status should be healthy(0)
// instead of corruption (1) during decommissioning
if(!checkDecommissionInProgress && datanodeInfo != null
&& datanodeInfo.isDecommissionInProgress()) {
String fsckOut = runFsck(conf, 0, true, testFile);
checkDecommissionInProgress = true;
}
} while (datanodeInfo != null && !datanodeInfo.isDecommissioned());
// check the replica status should be healthy(0) after decommission
// is done
String fsckOut = runFsck(conf, 0, true, testFile);
} finally {
if (cluster != null) {
cluster.shutdown();
}
}
}
}