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Merge r1401869 through r1402273 from trunk. 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-2802@1402278 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Tsz-wo Sze 2012-10-25 19:09:34 +00:00
parent 2d5334931e 2d74f68054
commit 40d2b6f308
18 changed files with 395 additions and 180 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
View File

@ -150,6 +150,8 @@ Trunk (Unreleased)
HDFS-4052. BlockManager#invalidateWork should print log outside the lock.
(Jing Zhao via suresh)
HDFS-4110. Refine a log printed in JNStorage. (Liang Xie via suresh)
OPTIMIZATIONS
BUG FIXES
@ -233,6 +235,9 @@ Trunk (Unreleased)
HDFS-2434. TestNameNodeMetrics.testCorruptBlock fails intermittently.
(Jing Zhao via suresh)
HDFS-4067. TestUnderReplicatedBlocks intermittently fails due to
ReplicaAlreadyExistsException. (Jing Zhao via suresh)
BREAKDOWN OF HDFS-3077 SUBTASKS
HDFS-3077. Quorum-based protocol for reading and writing edit logs.
@ -413,6 +418,9 @@ Release 2.0.3-alpha - Unreleased
HDFS-4099. Clean up replication code and add more javadoc. (szetszwo)
HDFS-4107. Add utility methods for casting INode to INodeFile and
INodeFileUnderConstruction. (szetszwo)
OPTIMIZATIONS
BUG FIXES
@ -488,6 +496,10 @@ Release 2.0.3-alpha - Unreleased
HDFS-4022. Replication not happening for appended block.
(Vinay via umamahesh)
HDFS-3948. Do not use hflush in TestWebHDFS.testNamenodeRestart() since the
out stream returned by WebHdfsFileSystem does not support it. (Jing Zhao
via szetszwo)
Release 2.0.2-alpha - 2012-09-07
INCOMPATIBLE CHANGES

3
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/qjournal/server/JNStorage.java
View File

@ -171,8 +171,7 @@ private static void purgeMatching(File dir, List<Pattern> patterns,
void format(NamespaceInfo nsInfo) throws IOException {
setStorageInfo(nsInfo);
LOG.info("Formatting journal storage directory " +
sd + " with nsid: " + getNamespaceID());
LOG.info("Formatting journal " + sd + " with nsid: " + getNamespaceID());
// Unlock the directory before formatting, because we will
// re-analyze it after format(). The analyzeStorage() call
// below is reponsible for re-locking it. This is a no-op

16
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSDirectory.java
View File

@ -1012,7 +1012,7 @@ public void unprotectedConcat(String target, String [] srcs, long timestamp)
int i = 0;
int totalBlocks = 0;
for(String src : srcs) {
INodeFile srcInode = getFileINode(src);
INodeFile srcInode = (INodeFile)getINode(src);
allSrcInodes[i++] = srcInode;
totalBlocks += srcInode.blocks.length;
}
@ -1300,25 +1300,13 @@ Block[] getFileBlocks(String src) throws UnresolvedLinkException {
}
}
/**
* Get {@link INode} associated with the file.
*/
INodeFile getFileINode(String src) throws UnresolvedLinkException {
INode inode = getINode(src);
if (inode == null || inode.isDirectory())
return null;
assert !inode.isLink();
return (INodeFile) inode;
}
/**
* Get {@link INode} associated with the file / directory.
*/
public INode getINode(String src) throws UnresolvedLinkException {
readLock();
try {
INode iNode = rootDir.getNode(src, true);
return iNode;
return rootDir.getNode(src, true);
} finally {
readUnlock();
}

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

@ -477,8 +477,8 @@ private void applyEditLogOp(FSEditLogOp op, FSDirectory fsDir,
Lease lease = fsNamesys.leaseManager.getLease(
reassignLeaseOp.leaseHolder);
INodeFileUnderConstruction pendingFile =
(INodeFileUnderConstruction) fsDir.getFileINode(
reassignLeaseOp.path);
INodeFileUnderConstruction.valueOf(
fsDir.getINode(reassignLeaseOp.path), reassignLeaseOp.path);
fsNamesys.reassignLeaseInternal(lease,
reassignLeaseOp.path, reassignLeaseOp.newHolder, pendingFile);
break;

9
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSImageFormat.java
View File

@ -365,14 +365,7 @@ private void loadFilesUnderConstruction(DataInputStream in)
// verify that file exists in namespace
String path = cons.getLocalName();
INode old = fsDir.getFileINode(path);
if (old == null) {
throw new IOException("Found lease for non-existent file " + path);
}
if (old.isDirectory()) {
throw new IOException("Found lease for directory " + path);
}
INodeFile oldnode = (INodeFile) old;
INodeFile oldnode = INodeFile.valueOf(fsDir.getINode(path), path);
fsDir.replaceNode(path, oldnode, cons);
namesystem.leaseManager.addLease(cons.getClientName(), path);
}

149
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
View File

@ -1270,11 +1270,7 @@ private LocatedBlocks getBlockLocationsUpdateTimes(String src,
}
long now = now();
INodeFile inode = dir.getFileINode(src);
if (inode == null) {
throw new FileNotFoundException("File does not exist: " + src);
}
assert !inode.isLink();
final INodeFile inode = INodeFile.valueOf(dir.getINode(src), src);
if (doAccessTime && isAccessTimeSupported()) {
if (now <= inode.getAccessTime() + getAccessTimePrecision()) {
// if we have to set access time but we only have the readlock, then
@ -1390,28 +1386,27 @@ private void concatInternal(String target, String [] srcs)
// we put the following prerequisite for the operation
// replication and blocks sizes should be the same for ALL the blocks
// check the target
INode inode = dir.getFileINode(target);
if(inode == null) {
throw new IllegalArgumentException("concat: trg file doesn't exist");
final INodeFile trgInode = INodeFile.valueOf(dir.getINode(target), target);
if(trgInode.isUnderConstruction()) {
throw new HadoopIllegalArgumentException("concat: target file "
+ target + " is under construction");
}
if(inode.isUnderConstruction()) {
throw new IllegalArgumentException("concat: trg file is uner construction");
}
INodeFile trgInode = (INodeFile) inode;
// per design trg shouldn't be empty and all the blocks same size
// per design target shouldn't be empty and all the blocks same size
if(trgInode.blocks.length == 0) {
throw new IllegalArgumentException("concat: "+ target + " file is empty");
throw new HadoopIllegalArgumentException("concat: target file "
+ target + " is empty");
}
long blockSize = trgInode.getPreferredBlockSize();
// check the end block to be full
if(blockSize != trgInode.blocks[trgInode.blocks.length-1].getNumBytes()) {
throw new IllegalArgumentException(target + " blocks size should be the same");
throw new HadoopIllegalArgumentException("The last block in " + target
+ " is not full; last block size = "
+ trgInode.blocks[trgInode.blocks.length-1].getNumBytes()
+ " but file block size = " + blockSize);
}
si.add(trgInode);
@ -1424,21 +1419,21 @@ private void concatInternal(String target, String [] srcs)
if(i==srcs.length-1)
endSrc=true;
INodeFile srcInode = dir.getFileINode(src);
final INodeFile srcInode = INodeFile.valueOf(dir.getINode(src), src);
if(src.isEmpty()
|| srcInode == null
|| srcInode.isUnderConstruction()
|| srcInode.blocks.length == 0) {
throw new IllegalArgumentException("concat: file " + src +
" is invalid or empty or underConstruction");
throw new HadoopIllegalArgumentException("concat: source file " + src
+ " is invalid or empty or underConstruction");
}
// check replication and blocks size
if(repl != srcInode.getFileReplication()) {
throw new IllegalArgumentException(src + " and " + target + " " +
"should have same replication: "
+ repl + " vs. " + srcInode.getFileReplication());
throw new HadoopIllegalArgumentException("concat: the soruce file "
+ src + " and the target file " + target
+ " should have the same replication: source replication is "
+ srcInode.getBlockReplication()
+ " but target replication is " + repl);
}
//boolean endBlock=false;
@ -1448,8 +1443,11 @@ private void concatInternal(String target, String [] srcs)
if(endSrc)
idx = srcInode.blocks.length-2; // end block of endSrc is OK not to be full
if(idx >= 0 && srcInode.blocks[idx].getNumBytes() != blockSize) {
throw new IllegalArgumentException("concat: blocks sizes of " +
src + " and " + target + " should all be the same");
throw new HadoopIllegalArgumentException("concat: the soruce file "
+ src + " and the target file " + target
+ " should have the same blocks sizes: target block size is "
+ blockSize + " but the size of source block " + idx + " is "
+ srcInode.blocks[idx].getNumBytes());
}
si.add(srcInode);
@ -1458,7 +1456,8 @@ private void concatInternal(String target, String [] srcs)
// make sure no two files are the same
if(si.size() < srcs.length+1) { // trg + srcs
// it means at least two files are the same
throw new IllegalArgumentException("at least two files are the same");
throw new HadoopIllegalArgumentException(
"concat: at least two of the source files are the same");
}
if(NameNode.stateChangeLog.isDebugEnabled()) {
@ -1796,14 +1795,10 @@ private LocatedBlock startFileInternal(String src,
verifyParentDir(src);
}
try {
INodeFile myFile = dir.getFileINode(src);
try {
blockManager.verifyReplication(src, replication, clientMachine);
} catch(IOException e) {
throw new IOException("failed to create "+e.getMessage());
}
boolean create = flag.contains(CreateFlag.CREATE);
final INode myFile = dir.getINode(src);
if (myFile == null) {
if (!create) {
throw new FileNotFoundException("failed to overwrite or append to non-existent file "
@ -1829,8 +1824,9 @@ private LocatedBlock startFileInternal(String src,
blockManager.getDatanodeManager().getDatanodeByHost(clientMachine);
if (append && myFile != null) {
final INodeFile f = INodeFile.valueOf(myFile, src);
return prepareFileForWrite(
src, myFile, holder, clientMachine, clientNode, true);
src, f, holder, clientMachine, clientNode, true);
} else {
// Now we can add the name to the filesystem. This file has no
// blocks associated with it.
@ -1925,11 +1921,7 @@ boolean recoverLease(String src, String holder, String clientMachine)
throw new IOException("Invalid file name: " + src);
}
INode inode = dir.getFileINode(src);
if (inode == null) {
throw new FileNotFoundException("File not found " + src);
}
final INodeFile inode = INodeFile.valueOf(dir.getINode(src), src);
if (!inode.isUnderConstruction()) {
return true;
}
@ -2330,35 +2322,32 @@ boolean abandonBlock(ExtendedBlock b, String src, String holder)
private INodeFileUnderConstruction checkLease(String src, String holder)
throws LeaseExpiredException, UnresolvedLinkException {
assert hasReadOrWriteLock();
INodeFile file = dir.getFileINode(src);
checkLease(src, holder, file);
return (INodeFileUnderConstruction)file;
return checkLease(src, holder, dir.getINode(src));
}
private void checkLease(String src, String holder, INode file)
throws LeaseExpiredException {
private INodeFileUnderConstruction checkLease(String src, String holder,
INode file) throws LeaseExpiredException {
assert hasReadOrWriteLock();
if (file == null || file.isDirectory()) {
if (file == null || !(file instanceof INodeFile)) {
Lease lease = leaseManager.getLease(holder);
throw new LeaseExpiredException("No lease on " + src +
" File does not exist. " +
(lease != null ? lease.toString() :
"Holder " + holder +
" does not have any open files."));
throw new LeaseExpiredException(
"No lease on " + src + ": File does not exist. "
+ (lease != null ? lease.toString()
: "Holder " + holder + " does not have any open files."));
}
if (!file.isUnderConstruction()) {
Lease lease = leaseManager.getLease(holder);
throw new LeaseExpiredException("No lease on " + src +
" File is not open for writing. " +
(lease != null ? lease.toString() :
"Holder " + holder +
" does not have any open files."));
throw new LeaseExpiredException(
"No lease on " + src + ": File is not open for writing. "
+ (lease != null ? lease.toString()
: "Holder " + holder + " does not have any open files."));
}
INodeFileUnderConstruction pendingFile = (INodeFileUnderConstruction)file;
if (holder != null && !pendingFile.getClientName().equals(holder)) {
throw new LeaseExpiredException("Lease mismatch on " + src + " owned by "
+ pendingFile.getClientName() + " but is accessed by " + holder);
}
return pendingFile;
}
/**
@ -2400,15 +2389,15 @@ private boolean completeFileInternal(String src,
try {
pendingFile = checkLease(src, holder);
} catch (LeaseExpiredException lee) {
INodeFile file = dir.getFileINode(src);
if (file != null && !file.isUnderConstruction()) {
final INode inode = dir.getINode(src);
if (inode != null && inode instanceof INodeFile && !inode.isUnderConstruction()) {
// This could be a retry RPC - i.e the client tried to close
// the file, but missed the RPC response. Thus, it is trying
// again to close the file. If the file still exists and
// the client's view of the last block matches the actual
// last block, then we'll treat it as a successful close.
// See HDFS-3031.
Block realLastBlock = file.getLastBlock();
final Block realLastBlock = ((INodeFile)inode).getLastBlock();
if (Block.matchingIdAndGenStamp(last, realLastBlock)) {
NameNode.stateChangeLog.info("DIR* NameSystem.completeFile: " +
"received request from " + holder + " to complete file " + src +
@ -2994,23 +2983,9 @@ boolean internalReleaseLease(Lease lease, String src,
LOG.info("Recovering lease=" + lease + ", src=" + src);
assert !isInSafeMode();
assert hasWriteLock();
INodeFile iFile = dir.getFileINode(src);
if (iFile == null) {
final String message = "DIR* NameSystem.internalReleaseLease: "
+ "attempt to release a create lock on "
+ src + " file does not exist.";
NameNode.stateChangeLog.warn(message);
throw new IOException(message);
}
if (!iFile.isUnderConstruction()) {
final String message = "DIR* NameSystem.internalReleaseLease: "
+ "attempt to release a create lock on "
+ src + " but file is already closed.";
NameNode.stateChangeLog.warn(message);
throw new IOException(message);
}
INodeFileUnderConstruction pendingFile = (INodeFileUnderConstruction) iFile;
final INodeFileUnderConstruction pendingFile
= INodeFileUnderConstruction.valueOf(dir.getINode(src), src);
int nrBlocks = pendingFile.numBlocks();
BlockInfo[] blocks = pendingFile.getBlocks();
@ -4318,17 +4293,14 @@ private long getCompleteBlocksTotal() {
try {
for (Lease lease : leaseManager.getSortedLeases()) {
for (String path : lease.getPaths()) {
INode node;
final INodeFileUnderConstruction cons;
try {
node = dir.getFileINode(path);
cons = INodeFileUnderConstruction.valueOf(dir.getINode(path), path);
} catch (UnresolvedLinkException e) {
throw new AssertionError("Lease files should reside on this FS");
} catch (IOException e) {
throw new RuntimeException(e);
}
assert node != null : "Found a lease for nonexisting file.";
assert node.isUnderConstruction() :
"Found a lease for file " + path + " that is not under construction." +
" lease=" + lease;
INodeFileUnderConstruction cons = (INodeFileUnderConstruction) node;
BlockInfo[] blocks = cons.getBlocks();
if(blocks == null)
continue;
@ -4911,21 +4883,12 @@ void saveFilesUnderConstruction(DataOutputStream out) throws IOException {
for (Lease lease : leaseManager.getSortedLeases()) {
for(String path : lease.getPaths()) {
// verify that path exists in namespace
INode node;
final INodeFileUnderConstruction cons;
try {
node = dir.getFileINode(path);
cons = INodeFileUnderConstruction.valueOf(dir.getINode(path), path);
} catch (UnresolvedLinkException e) {
throw new AssertionError("Lease files should reside on this FS");
}
if (node == null) {
throw new IOException("saveLeases found path " + path +
" but no matching entry in namespace.");
}
if (!node.isUnderConstruction()) {
throw new IOException("saveLeases found path " + path +
" but is not under construction.");
}
INodeFileUnderConstruction cons = (INodeFileUnderConstruction) node;
FSImageSerialization.writeINodeUnderConstruction(out, cons, path);
}
}

12
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/INodeFile.java
View File

@ -17,6 +17,7 @@
*/
package org.apache.hadoop.hdfs.server.namenode;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.List;
@ -32,6 +33,17 @@
/** I-node for closed file. */
@InterfaceAudience.Private
public class INodeFile extends INode implements BlockCollection {
/** Cast INode to INodeFile. */
public static INodeFile valueOf(INode inode, String path) throws IOException {
if (inode == null) {
throw new FileNotFoundException("File does not exist: " + path);
}
if (!(inode instanceof INodeFile)) {
throw new FileNotFoundException("Path is not a file: " + path);
}
return (INodeFile)inode;
}
static final FsPermission UMASK = FsPermission.createImmutable((short)0111);
//Number of bits for Block size

12
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/INodeFileUnderConstruction.java
View File

@ -25,8 +25,8 @@
import org.apache.hadoop.hdfs.server.blockmanagement.BlockInfo;
import org.apache.hadoop.hdfs.server.blockmanagement.BlockInfoUnderConstruction;
import org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor;
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.BlockUCState;
import org.apache.hadoop.hdfs.server.blockmanagement.MutableBlockCollection;
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.BlockUCState;
import com.google.common.base.Joiner;
@ -35,6 +35,16 @@
*/
@InterfaceAudience.Private
class INodeFileUnderConstruction extends INodeFile implements MutableBlockCollection {
/** Cast INode to INodeFileUnderConstruction. */
public static INodeFileUnderConstruction valueOf(INode inode, String path
) throws IOException {
final INodeFile file = INodeFile.valueOf(inode, path);
if (!file.isUnderConstruction()) {
throw new IOException("File is not under construction: " + path);
}
return (INodeFileUnderConstruction)file;
}
private String clientName; // lease holder
private final String clientMachine;
private final DatanodeDescriptor clientNode; // if client is a cluster node too.

2
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/LeaseManager.java
View File

@ -253,7 +253,7 @@ public boolean expiredSoftLimit() {
private String findPath(INodeFileUnderConstruction pendingFile) {
try {
for (String src : paths) {
if (fsnamesystem.dir.getFileINode(src) == pendingFile) {
if (fsnamesystem.dir.getINode(src) == pendingFile) {
return src;
}
}

13
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDFSClientRetries.java
View File

@ -876,7 +876,14 @@ public static void namenodeRestartTest(final Configuration conf,
new Random().nextBytes(bytes);
out4.write(bytes);
out4.write(bytes);
if (isWebHDFS) {
// WebHDFS does not support hflush. To avoid DataNode communicating with
// NN while we're shutting down NN, we call out4.close() to finish
// writing the data
out4.close();
} else {
out4.hflush();
}
//shutdown namenode
assertTrue(HdfsUtils.isHealthy(uri));
@ -889,10 +896,12 @@ public static void namenodeRestartTest(final Configuration conf,
public void run() {
try {
//write some more data and then close the file
if (!isWebHDFS) {
out4.write(bytes);
out4.write(bytes);
out4.write(bytes);
out4.close();
}
} catch (Exception e) {
exceptions.add(e);
}
@ -975,7 +984,11 @@ public void run() {
Assert.assertEquals(String.format("count=%d", count),
bytes[count % bytes.length], (byte)r);
}
if (!isWebHDFS) {
Assert.assertEquals(5 * bytes.length, count);
} else {
Assert.assertEquals(2 * bytes.length, count);
}
in.close();
}

5
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDistributedFileSystem.java
View File

@ -119,8 +119,6 @@ public void testDFSClose() throws Exception {
DFSTestUtil.createFile(fileSys, p, 1L, (short)1, 0L);
DFSTestUtil.readFile(fileSys, p);
DFSClient client = ((DistributedFileSystem)fileSys).dfs;
fileSys.close();
} finally {
@ -476,7 +474,7 @@ public void testFileChecksum() throws Exception {
fail("Expecting FileNotFoundException");
} catch (FileNotFoundException e) {
assertTrue("Not throwing the intended exception message", e.getMessage()
.contains("File does not exist: /test/TestExistingDir"));
.contains("Path is not a file: /test/TestExistingDir"));
}
//hftp
@ -712,7 +710,6 @@ public void testGetFileBlockStorageLocationsError() throws Exception {
@Test
public void testCreateWithCustomChecksum() throws Exception {
Configuration conf = getTestConfiguration();
final long grace = 1000L;
MiniDFSCluster cluster = null;
Path testBasePath = new Path("/test/csum");
// create args

7
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestUnderReplicatedBlocks.java
View File

@ -27,6 +27,7 @@
import org.apache.hadoop.hdfs.HdfsConfiguration;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.protocol.ExtendedBlock;
import org.apache.hadoop.hdfs.server.datanode.DataNodeTestUtils;
import org.junit.Test;
public class TestUnderReplicatedBlocks {
@ -49,6 +50,12 @@ public void testSetrepIncWithUnderReplicatedBlocks() throws Exception {
ExtendedBlock b = DFSTestUtil.getFirstBlock(fs, FILE_PATH);
DatanodeDescriptor dn = bm.blocksMap.nodeIterator(b.getLocalBlock()).next();
bm.addToInvalidates(b.getLocalBlock(), dn);
// Compute the invalidate work in NN, and trigger the heartbeat from DN
BlockManagerTestUtil.computeAllPendingWork(bm);
DataNodeTestUtils.triggerHeartbeat(cluster.getDataNode(dn.getIpcPort()));
// Wait to make sure the DataNode receives the deletion request
Thread.sleep(1000);
// Remove the record from blocksMap
bm.blocksMap.removeNode(b.getLocalBlock(), dn);
// increment this file's replication factor

3
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestBlockUnderConstruction.java
View File

@ -83,8 +83,7 @@ void writeFile(Path file, FSDataOutputStream stm, int size)
private void verifyFileBlocks(String file,
boolean isFileOpen) throws IOException {
FSNamesystem ns = cluster.getNamesystem();
INodeFile inode = ns.dir.getFileINode(file);
assertTrue("File does not exist: " + inode.toString(), inode != null);
final INodeFile inode = INodeFile.valueOf(ns.dir.getINode(file), file);
assertTrue("File " + inode.toString() +
" isUnderConstruction = " + inode.isUnderConstruction() +
" expected to be " + isFileOpen,

92
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestINodeFile.java
View File

@ -18,13 +18,17 @@
package org.apache.hadoop.hdfs.server.namenode;
import static org.junit.Assert.*;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import java.io.FileNotFoundException;
import java.io.IOException;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.fs.permission.PermissionStatus;
import org.apache.hadoop.hdfs.server.blockmanagement.BlockInfo;
import org.junit.Test;
public class TestINodeFile {
@ -199,4 +203,88 @@ private INodeFile[] createINodeFiles(int nCount, String fileNamePrefix) {
return iNodes;
}
/**
* Test for the static {@link INodeFile#valueOf(INode, String)}
* and {@link INodeFileUnderConstruction#valueOf(INode, String)} methods.
* @throws IOException
*/
@Test
public void testValueOf () throws IOException {
final String path = "/testValueOf";
final PermissionStatus perm = new PermissionStatus(
userName, null, FsPermission.getDefault());
final short replication = 3;
{//cast from null
final INode from = null;
//cast to INodeFile, should fail
try {
INodeFile.valueOf(from, path);
fail();
} catch(FileNotFoundException fnfe) {
assertTrue(fnfe.getMessage().contains("File does not exist"));
}
//cast to INodeFileUnderConstruction, should fail
try {
INodeFileUnderConstruction.valueOf(from, path);
fail();
} catch(FileNotFoundException fnfe) {
assertTrue(fnfe.getMessage().contains("File does not exist"));
}
}
{//cast from INodeFile
final INode from = new INodeFile(
perm, null, replication, 0L, 0L, preferredBlockSize);
//cast to INodeFile, should success
final INodeFile f = INodeFile.valueOf(from, path);
assertTrue(f == from);
//cast to INodeFileUnderConstruction, should fail
try {
INodeFileUnderConstruction.valueOf(from, path);
fail();
} catch(IOException ioe) {
assertTrue(ioe.getMessage().contains("File is not under construction"));
}
}
{//cast from INodeFileUnderConstruction
final INode from = new INodeFileUnderConstruction(
perm, replication, 0L, 0L, "client", "machine", null);
//cast to INodeFile, should success
final INodeFile f = INodeFile.valueOf(from, path);
assertTrue(f == from);
//cast to INodeFileUnderConstruction, should success
final INodeFileUnderConstruction u = INodeFileUnderConstruction.valueOf(
from, path);
assertTrue(u == from);
}
{//cast from INodeDirectory
final INode from = new INodeDirectory(perm, 0L);
//cast to INodeFile, should fail
try {
INodeFile.valueOf(from, path);
fail();
} catch(FileNotFoundException fnfe) {
assertTrue(fnfe.getMessage().contains("Path is not a file"));
}
//cast to INodeFileUnderConstruction, should fail
try {
INodeFileUnderConstruction.valueOf(from, path);
fail();
} catch(FileNotFoundException fnfe) {
assertTrue(fnfe.getMessage().contains("Path is not a file"));
}
}
}
}

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

@ -610,6 +610,9 @@ Release 0.23.5 - UNRELEASED
MAPREDUCE-4741. WARN and ERROR messages logged during normal AM shutdown.
(Vinod Kumar Vavilapalli via jlowe)
MAPREDUCE-4730. Fix Reducer's EventFetcher to scale the map-completion
requests slowly to avoid HADOOP-8942. (Jason Lowe via vinodkv)
Release 0.23.4 - UNRELEASED
INCOMPATIBLE CHANGES

34
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/task/reduce/EventFetcher.java
View File

@ -27,10 +27,8 @@
import org.apache.hadoop.mapred.TaskUmbilicalProtocol;
import org.apache.hadoop.mapreduce.TaskAttemptID;
@SuppressWarnings("deprecation")
class EventFetcher<K,V> extends Thread {
private static final long SLEEP_TIME = 1000;
private static final int MAX_EVENTS_TO_FETCH = 10000;
private static final int MAX_RETRIES = 10;
private static final int RETRY_PERIOD = 5000;
private static final Log LOG = LogFactory.getLog(EventFetcher.class);
@ -38,7 +36,8 @@ class EventFetcher<K,V> extends Thread {
private final TaskAttemptID reduce;
private final TaskUmbilicalProtocol umbilical;
private final ShuffleScheduler<K,V> scheduler;
private int fromEventId = 0;
private int fromEventIdx = 0;
private int maxEventsToFetch;
private ExceptionReporter exceptionReporter = null;
private int maxMapRuntime = 0;
@ -48,13 +47,15 @@ class EventFetcher<K,V> extends Thread {
public EventFetcher(TaskAttemptID reduce,
TaskUmbilicalProtocol umbilical,
ShuffleScheduler<K,V> scheduler,
ExceptionReporter reporter) {
ExceptionReporter reporter,
int maxEventsToFetch) {
setName("EventFetcher for fetching Map Completion Events");
setDaemon(true);
this.reduce = reduce;
this.umbilical = umbilical;
this.scheduler = scheduler;
exceptionReporter = reporter;
this.maxEventsToFetch = maxEventsToFetch;
}
@Override
@ -112,32 +113,33 @@ public void shutDown() {
* from a given event ID.
* @throws IOException
*/
private int getMapCompletionEvents() throws IOException {
protected int getMapCompletionEvents() throws IOException {
int numNewMaps = 0;
TaskCompletionEvent events[] = null;
do {
MapTaskCompletionEventsUpdate update =
umbilical.getMapCompletionEvents((org.apache.hadoop.mapred.JobID)
reduce.getJobID(),
fromEventId,
MAX_EVENTS_TO_FETCH,
(org.apache.hadoop.mapred.TaskAttemptID)
reduce);
TaskCompletionEvent events[] = update.getMapTaskCompletionEvents();
umbilical.getMapCompletionEvents(
(org.apache.hadoop.mapred.JobID)reduce.getJobID(),
fromEventIdx,
maxEventsToFetch,
(org.apache.hadoop.mapred.TaskAttemptID)reduce);
events = update.getMapTaskCompletionEvents();
LOG.debug("Got " + events.length + " map completion events from " +
fromEventId);
fromEventIdx);
// Check if the reset is required.
// Since there is no ordering of the task completion events at the
// reducer, the only option to sync with the new jobtracker is to reset
// the events index
if (update.shouldReset()) {
fromEventId = 0;
fromEventIdx = 0;
scheduler.resetKnownMaps();
}
// Update the last seen event ID
fromEventId += events.length;
fromEventIdx += events.length;
// Process the TaskCompletionEvents:
// 1. Save the SUCCEEDED maps in knownOutputs to fetch the outputs.
@ -173,6 +175,8 @@ private int getMapCompletionEvents() throws IOException {
break;
}
}
} while (events.length == maxEventsToFetch);
return numNewMaps;
}

15
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/task/reduce/Shuffle.java
View File

@ -40,9 +40,12 @@
@InterfaceAudience.Private
@InterfaceStability.Unstable
@SuppressWarnings({"deprecation", "unchecked", "rawtypes"})
@SuppressWarnings({"unchecked", "rawtypes"})
public class Shuffle<K, V> implements ExceptionReporter {
private static final int PROGRESS_FREQUENCY = 2000;
private static final int MAX_EVENTS_TO_FETCH = 10000;
private static final int MIN_EVENTS_TO_FETCH = 100;
private static final int MAX_RPC_OUTSTANDING_EVENTS = 3000000;
private final TaskAttemptID reduceId;
private final JobConf jobConf;
@ -99,9 +102,17 @@ public Shuffle(TaskAttemptID reduceId, JobConf jobConf, FileSystem localFS,
}
public RawKeyValueIterator run() throws IOException, InterruptedException {
// Scale the maximum events we fetch per RPC call to mitigate OOM issues
// on the ApplicationMaster when a thundering herd of reducers fetch events
// TODO: This should not be necessary after HADOOP-8942
int eventsPerReducer = Math.max(MIN_EVENTS_TO_FETCH,
MAX_RPC_OUTSTANDING_EVENTS / jobConf.getNumReduceTasks());
int maxEventsToFetch = Math.min(MAX_EVENTS_TO_FETCH, eventsPerReducer);
// Start the map-completion events fetcher thread
final EventFetcher<K,V> eventFetcher =
new EventFetcher<K,V>(reduceId, umbilical, scheduler, this);
new EventFetcher<K,V>(reduceId, umbilical, scheduler, this,
maxEventsToFetch);
eventFetcher.start();
// Start the map-output fetcher threads

116
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/test/java/org/apache/hadoop/mapreduce/task/reduce/TestEventFetcher.java Normal file
View File

@ -0,0 +1,116 @@
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.mapreduce.task.reduce;
import static org.mockito.Mockito.any;
import static org.mockito.Mockito.anyInt;
import static org.mockito.Mockito.anyString;
import static org.mockito.Mockito.eq;
import static org.mockito.Mockito.inOrder;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.never;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
import java.io.IOException;
import java.util.ArrayList;
import org.apache.hadoop.mapred.JobID;
import org.apache.hadoop.mapred.MapTaskCompletionEventsUpdate;
import org.apache.hadoop.mapred.TaskAttemptID;
import org.apache.hadoop.mapred.TaskCompletionEvent;
import org.apache.hadoop.mapred.TaskUmbilicalProtocol;
import org.apache.hadoop.mapreduce.TaskType;
import org.junit.Test;
import org.mockito.InOrder;
public class TestEventFetcher {
@Test
public void testConsecutiveFetch() throws IOException {
final int MAX_EVENTS_TO_FETCH = 100;
TaskAttemptID tid = new TaskAttemptID("12345", 1, TaskType.REDUCE, 1, 1);
TaskUmbilicalProtocol umbilical = mock(TaskUmbilicalProtocol.class);
when(umbilical.getMapCompletionEvents(any(JobID.class),
anyInt(), anyInt(), any(TaskAttemptID.class)))
.thenReturn(getMockedCompletionEventsUpdate(0, 0));
when(umbilical.getMapCompletionEvents(any(JobID.class),
eq(0), eq(MAX_EVENTS_TO_FETCH), eq(tid)))
.thenReturn(getMockedCompletionEventsUpdate(0, MAX_EVENTS_TO_FETCH));
when(umbilical.getMapCompletionEvents(any(JobID.class),
eq(MAX_EVENTS_TO_FETCH), eq(MAX_EVENTS_TO_FETCH), eq(tid)))
.thenReturn(getMockedCompletionEventsUpdate(MAX_EVENTS_TO_FETCH,
MAX_EVENTS_TO_FETCH));
when(umbilical.getMapCompletionEvents(any(JobID.class),
eq(MAX_EVENTS_TO_FETCH*2), eq(MAX_EVENTS_TO_FETCH), eq(tid)))
.thenReturn(getMockedCompletionEventsUpdate(MAX_EVENTS_TO_FETCH*2, 3));
@SuppressWarnings("unchecked")
ShuffleScheduler<String,String> scheduler = mock(ShuffleScheduler.class);
ExceptionReporter reporter = mock(ExceptionReporter.class);
EventFetcherForTest<String,String> ef =
new EventFetcherForTest<String,String>(tid, umbilical, scheduler,
reporter, MAX_EVENTS_TO_FETCH);
ef.getMapCompletionEvents();
verify(reporter, never()).reportException(any(Throwable.class));
InOrder inOrder = inOrder(umbilical);
inOrder.verify(umbilical).getMapCompletionEvents(any(JobID.class),
eq(0), eq(MAX_EVENTS_TO_FETCH), eq(tid));
inOrder.verify(umbilical).getMapCompletionEvents(any(JobID.class),
eq(MAX_EVENTS_TO_FETCH), eq(MAX_EVENTS_TO_FETCH), eq(tid));
inOrder.verify(umbilical).getMapCompletionEvents(any(JobID.class),
eq(MAX_EVENTS_TO_FETCH*2), eq(MAX_EVENTS_TO_FETCH), eq(tid));
verify(scheduler, times(MAX_EVENTS_TO_FETCH*2 + 3)).addKnownMapOutput(
anyString(), anyString(), any(TaskAttemptID.class));
}
private MapTaskCompletionEventsUpdate getMockedCompletionEventsUpdate(
int startIdx, int numEvents) {
ArrayList<TaskCompletionEvent> tceList =
new ArrayList<TaskCompletionEvent>(numEvents);
for (int i = 0; i < numEvents; ++i) {
int eventIdx = startIdx + i;
TaskCompletionEvent tce = new TaskCompletionEvent(eventIdx,
new TaskAttemptID("12345", 1, TaskType.MAP, eventIdx, 0),
eventIdx, true, TaskCompletionEvent.Status.SUCCEEDED,
"http://somehost:8888");
tceList.add(tce);
}
TaskCompletionEvent[] events = {};
return new MapTaskCompletionEventsUpdate(tceList.toArray(events), false);
}
private static class EventFetcherForTest<K,V> extends EventFetcher<K,V> {
public EventFetcherForTest(TaskAttemptID reduce,
TaskUmbilicalProtocol umbilical, ShuffleScheduler<K,V> scheduler,
ExceptionReporter reporter, int maxEventsToFetch) {
super(reduce, umbilical, scheduler, reporter, maxEventsToFetch);
}
@Override
public int getMapCompletionEvents() throws IOException {
return super.getMapCompletionEvents();
}
}
}