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HDFS-5840. Merge r1581260 from trunk. 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1581261 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Jing Zhao 2014-03-25 06:50:14 +00:00
parent 590df94253
commit 8b39fc9076
12 changed files with 154 additions and 49 deletions
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3
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -448,6 +448,9 @@ Release 2.4.0 - UNRELEASED
HDFS-5846. Assigning DEFAULT_RACK in resolveNetworkLocation method can break
data resiliency. (Nikola Vujic via cnauroth)
HDFS-5840. Follow-up to HDFS-5138 to improve error handling during partial
upgrade failures. (atm, jing9 and suresh via jing9)
BREAKDOWN OF HDFS-5698 SUBTASKS AND RELATED JIRAS

26
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSUtil.java
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@ -1714,23 +1714,19 @@ public static long parseRelativeTime(String relTime) throws IOException {
*
* @param objects the collection of objects to check for equality.
*/
public static void assertAllResultsEqual(Collection<?> objects) {
Object[] resultsArray = objects.toArray();
if (resultsArray.length == 0)
public static void assertAllResultsEqual(Collection<?> objects)
throws AssertionError {
if (objects.size() == 0 || objects.size() == 1)
return;
for (int i = 0; i < resultsArray.length; i++) {
if (i == 0)
continue;
else {
Object currElement = resultsArray[i];
Object lastElement = resultsArray[i - 1];
if ((currElement == null && currElement != lastElement) ||
(currElement != null && !currElement.equals(lastElement))) {
throw new AssertionError("Not all elements match in results: " +
Arrays.toString(resultsArray));
}
Object[] resultsArray = objects.toArray();
for (int i = 1; i < resultsArray.length; i++) {
Object currElement = resultsArray[i];
Object lastElement = resultsArray[i - 1];
if ((currElement == null && currElement != lastElement) ||
(currElement != null && !currElement.equals(lastElement))) {
throw new AssertionError("Not all elements match in results: " +
Arrays.toString(resultsArray));
}
}
}

12
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/qjournal/client/QuorumJournalManager.java
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@ -571,7 +571,11 @@ public boolean canRollBack(StorageInfo storage, StorageInfo prevStorage,
// Either they all return the same thing or this call fails, so we can
// just return the first result.
DFSUtil.assertAllResultsEqual(call.getResults().values());
try {
DFSUtil.assertAllResultsEqual(call.getResults().values());
} catch (AssertionError ae) {
throw new IOException("Results differed for canRollBack", ae);
}
for (Boolean result : call.getResults().values()) {
return result;
}
@ -617,7 +621,11 @@ public long getJournalCTime() throws IOException {
// Either they all return the same thing or this call fails, so we can
// just return the first result.
DFSUtil.assertAllResultsEqual(call.getResults().values());
try {
DFSUtil.assertAllResultsEqual(call.getResults().values());
} catch (AssertionError ae) {
throw new IOException("Results differed for getJournalCTime", ae);
}
for (Long result : call.getResults().values()) {
return result;
}

18
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/qjournal/server/JNStorage.java
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@ -65,15 +65,15 @@ class JNStorage extends Storage {
* @param errorReporter a callback to report errors
* @throws IOException
*/
protected JNStorage(Configuration conf, File logDir,
protected JNStorage(Configuration conf, File logDir, StartupOption startOpt,
StorageErrorReporter errorReporter) throws IOException {
super(NodeType.JOURNAL_NODE);
sd = new StorageDirectory(logDir);
this.addStorageDir(sd);
this.fjm = new FileJournalManager(conf, sd, errorReporter);
analyzeStorage();
analyzeAndRecoverStorage(startOpt);
}
FileJournalManager getJournalManager() {
@ -216,6 +216,18 @@ protected void setLayoutVersion(Properties props, StorageDirectory sd)
layoutVersion = lv;
}
void analyzeAndRecoverStorage(StartupOption startOpt) throws IOException {
this.state = sd.analyzeStorage(startOpt, this);
final boolean needRecover = state != StorageState.NORMAL
&& state != StorageState.NON_EXISTENT
&& state != StorageState.NOT_FORMATTED;
if (state == StorageState.NORMAL && startOpt != StartupOption.ROLLBACK) {
readProperties(sd);
} else if (needRecover) {
sd.doRecover(state);
}
}
void checkConsistentNamespace(NamespaceInfo nsInfo)
throws IOException {
if (nsInfo.getNamespaceID() != getNamespaceID()) {

6
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/qjournal/server/Journal.java
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@ -43,6 +43,7 @@
import org.apache.hadoop.hdfs.qjournal.protocol.QJournalProtocolProtos.PrepareRecoveryResponseProto;
import org.apache.hadoop.hdfs.qjournal.protocol.QJournalProtocolProtos.SegmentStateProto;
import org.apache.hadoop.hdfs.qjournal.protocol.RequestInfo;
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.StartupOption;
import org.apache.hadoop.hdfs.server.common.StorageErrorReporter;
import org.apache.hadoop.hdfs.server.common.StorageInfo;
import org.apache.hadoop.hdfs.server.namenode.EditLogOutputStream;
@ -138,8 +139,9 @@ public class Journal implements Closeable {
private static final int WARN_SYNC_MILLIS_THRESHOLD = 1000;
Journal(Configuration conf, File logDir, String journalId,
StorageErrorReporter errorReporter) throws IOException {
storage = new JNStorage(conf, logDir, errorReporter);
StartupOption startOpt, StorageErrorReporter errorReporter)
throws IOException {
storage = new JNStorage(conf, logDir, startOpt, errorReporter);
this.journalId = journalId;
refreshCachedData();

16
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/qjournal/server/JournalNode.java
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@ -34,6 +34,7 @@
import org.apache.hadoop.hdfs.DFSConfigKeys;
import org.apache.hadoop.hdfs.HdfsConfiguration;
import org.apache.hadoop.hdfs.qjournal.client.QuorumJournalManager;
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.StartupOption;
import org.apache.hadoop.hdfs.server.common.StorageErrorReporter;
import org.apache.hadoop.hdfs.server.common.StorageInfo;
import org.apache.hadoop.io.IOUtils;
@ -77,19 +78,24 @@ public class JournalNode implements Tool, Configurable, JournalNodeMXBean {
*/
private int resultCode = 0;
synchronized Journal getOrCreateJournal(String jid) throws IOException {
synchronized Journal getOrCreateJournal(String jid, StartupOption startOpt)
throws IOException {
QuorumJournalManager.checkJournalId(jid);
Journal journal = journalsById.get(jid);
if (journal == null) {
File logDir = getLogDir(jid);
LOG.info("Initializing journal in directory " + logDir);
journal = new Journal(conf, logDir, jid, new ErrorReporter());
journal = new Journal(conf, logDir, jid, startOpt, new ErrorReporter());
journalsById.put(jid, journal);
}
return journal;
}
Journal getOrCreateJournal(String jid) throws IOException {
return getOrCreateJournal(jid, StartupOption.REGULAR);
}
@Override
public void setConf(Configuration conf) {
@ -306,12 +312,12 @@ public void doFinalize(String journalId) throws IOException {
public Boolean canRollBack(String journalId, StorageInfo storage,
StorageInfo prevStorage, int targetLayoutVersion) throws IOException {
return getOrCreateJournal(journalId).canRollBack(storage, prevStorage,
targetLayoutVersion);
return getOrCreateJournal(journalId, StartupOption.ROLLBACK).canRollBack(
storage, prevStorage, targetLayoutVersion);
}
public void doRollback(String journalId) throws IOException {
getOrCreateJournal(journalId).doRollback();
getOrCreateJournal(journalId, StartupOption.ROLLBACK).doRollback();
}
public Long getJournalCTime(String journalId) throws IOException {

4
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSEditLog.java
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@ -44,9 +44,9 @@
import org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenIdentifier;
import org.apache.hadoop.hdfs.server.blockmanagement.BlockInfo;
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.NamenodeRole;
import org.apache.hadoop.hdfs.server.common.Storage;
import org.apache.hadoop.hdfs.server.common.Storage.FormatConfirmable;
import org.apache.hadoop.hdfs.server.common.Storage.StorageDirectory;
import org.apache.hadoop.hdfs.server.common.StorageInfo;
import org.apache.hadoop.hdfs.server.namenode.FSEditLogOp.AddBlockOp;
import org.apache.hadoop.hdfs.server.namenode.FSEditLogOp.AddCacheDirectiveInfoOp;
import org.apache.hadoop.hdfs.server.namenode.FSEditLogOp.AddCachePoolOp;
@ -1367,7 +1367,7 @@ public synchronized void doFinalizeOfSharedLog() throws IOException {
}
}
public synchronized boolean canRollBackSharedLog(Storage prevStorage,
public synchronized boolean canRollBackSharedLog(StorageInfo prevStorage,
int targetLayoutVersion) throws IOException {
for (JournalAndStream jas : journalSet.getAllJournalStreams()) {
if (jas.isShared()) {

16
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSImage.java
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@ -393,6 +393,10 @@ void doUpgrade(FSNamesystem target) throws IOException {
saveFSImageInAllDirs(target, editLog.getLastWrittenTxId());
// upgrade shared edit storage first
if (target.isHaEnabled()) {
editLog.doUpgradeOfSharedLog();
}
for (Iterator<StorageDirectory> it = storage.dirIterator(false); it.hasNext();) {
StorageDirectory sd = it.next();
try {
@ -402,9 +406,6 @@ void doUpgrade(FSNamesystem target) throws IOException {
continue;
}
}
if (target.isHaEnabled()) {
editLog.doUpgradeOfSharedLog();
}
storage.reportErrorsOnDirectories(errorSDs);
isUpgradeFinalized = false;
@ -430,14 +431,19 @@ void doRollback(FSNamesystem fsns) throws IOException {
HdfsConstants.NAMENODE_LAYOUT_VERSION)) {
continue;
}
LOG.info("Can perform rollback for " + sd);
canRollback = true;
}
if (fsns.isHaEnabled()) {
// If HA is enabled, check if the shared log can be rolled back as well.
editLog.initJournalsForWrite();
canRollback |= editLog.canRollBackSharedLog(prevState.getStorage(),
HdfsConstants.NAMENODE_LAYOUT_VERSION);
boolean canRollBackSharedEditLog = editLog.canRollBackSharedLog(
prevState.getStorage(), HdfsConstants.NAMENODE_LAYOUT_VERSION);
if (canRollBackSharedEditLog) {
LOG.info("Can perform rollback for shared edit log.");
canRollback = true;
}
}
if (!canRollback)

32
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NNUpgradeUtil.java
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@ -26,6 +26,8 @@
import org.apache.hadoop.hdfs.server.common.Storage.StorageDirectory;
import org.apache.hadoop.hdfs.server.common.StorageInfo;
import com.google.common.base.Preconditions;
abstract class NNUpgradeUtil {
private static final Log LOG = LogFactory.getLog(NNUpgradeUtil.class);
@ -82,7 +84,8 @@ static void doFinalize(StorageDirectory sd) throws IOException {
return;
}
LOG.info("Finalizing upgrade of storage directory " + sd.getRoot());
assert sd.getCurrentDir().exists() : "Current directory must exist.";
Preconditions.checkState(sd.getCurrentDir().exists(),
"Current directory must exist.");
final File tmpDir = sd.getFinalizedTmp();
// rename previous to tmp and remove
NNStorage.rename(prevDir, tmpDir);
@ -105,9 +108,14 @@ static void doPreUpgrade(StorageDirectory sd) throws IOException {
File curDir = sd.getCurrentDir();
File prevDir = sd.getPreviousDir();
File tmpDir = sd.getPreviousTmp();
assert curDir.exists() : "Current directory must exist.";
assert !prevDir.exists() : "previous directory must not exist.";
assert !tmpDir.exists() : "previous.tmp directory must not exist.";
Preconditions.checkState(curDir.exists(),
"Current directory must exist for preupgrade.");
Preconditions.checkState(!prevDir.exists(),
"Previous directory must not exist for preupgrade.");
Preconditions.checkState(!tmpDir.exists(),
"Previous.tmp directory must not exist for preupgrade."
+ "Consider restarting for recovery.");
// rename current to tmp
NNStorage.rename(curDir, tmpDir);
@ -136,6 +144,11 @@ static void doUpgrade(StorageDirectory sd, Storage storage) throws
File prevDir = sd.getPreviousDir();
File tmpDir = sd.getPreviousTmp();
Preconditions.checkState(!prevDir.exists(),
"previous directory must not exist for upgrade.");
Preconditions.checkState(tmpDir.exists(),
"previous.tmp directory must exist for upgrade.");
// rename tmp to previous
NNStorage.rename(tmpDir, prevDir);
} catch (IOException ioe) {
@ -154,14 +167,19 @@ static void doUpgrade(StorageDirectory sd, Storage storage) throws
static void doRollBack(StorageDirectory sd)
throws IOException {
File prevDir = sd.getPreviousDir();
if (!prevDir.exists())
if (!prevDir.exists()) {
return;
}
File tmpDir = sd.getRemovedTmp();
assert !tmpDir.exists() : "removed.tmp directory must not exist.";
Preconditions.checkState(!tmpDir.exists(),
"removed.tmp directory must not exist for rollback."
+ "Consider restarting for recovery.");
// rename current to tmp
File curDir = sd.getCurrentDir();
assert curDir.exists() : "Current directory must exist.";
Preconditions.checkState(curDir.exists(),
"Current directory must exist for rollback.");
NNStorage.rename(curDir, tmpDir);
// rename previous to current
NNStorage.rename(prevDir, curDir);

11
hadoop-hdfs-project/hadoop-hdfs/src/site/apt/HDFSHighAvailabilityWithQJM.apt.vm
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@ -780,14 +780,19 @@ digest:hdfs-zkfcs:vlUvLnd8MlacsE80rDuu6ONESbM=:rwcda
[[1]] Shut down all of the NNs as normal, and install the newer software.
[[2]] Start one of the NNs with the <<<'-upgrade'>>> flag.
[[2]] Start up all of the JNs. Note that it is <<critical>> that all the
JNs be running when performing the upgrade, rollback, or finalization
operations. If any of the JNs are down at the time of running any of these
operations, the operation will fail.
[[3]] Start one of the NNs with the <<<'-upgrade'>>> flag.
[[3]] On start, this NN will not enter the standby state as usual in an HA
[[4]] On start, this NN will not enter the standby state as usual in an HA
setup. Rather, this NN will immediately enter the active state, perform an
upgrade of its local storage dirs, and also perform an upgrade of the shared
edit log.
[[4]] At this point the other NN in the HA pair will be out of sync with
[[5]] At this point the other NN in the HA pair will be out of sync with
the upgraded NN. In order to bring it back in sync and once again have a highly
available setup, you should re-bootstrap this NameNode by running the NN with
the <<<'-bootstrapStandby'>>> flag. It is an error to start this second NN with

15
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/qjournal/server/TestJournal.java
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@ -34,6 +34,7 @@
import org.apache.hadoop.hdfs.qjournal.protocol.QJournalProtocolProtos.NewEpochResponseProtoOrBuilder;
import org.apache.hadoop.hdfs.qjournal.protocol.QJournalProtocolProtos.SegmentStateProto;
import org.apache.hadoop.hdfs.qjournal.protocol.RequestInfo;
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.StartupOption;
import org.apache.hadoop.hdfs.server.common.Storage;
import org.apache.hadoop.hdfs.server.common.Storage.StorageDirectory;
import org.apache.hadoop.hdfs.server.common.StorageErrorReporter;
@ -70,7 +71,7 @@ public class TestJournal {
public void setup() throws Exception {
FileUtil.fullyDelete(TEST_LOG_DIR);
conf = new Configuration();
journal = new Journal(conf, TEST_LOG_DIR, JID,
journal = new Journal(conf, TEST_LOG_DIR, JID, StartupOption.REGULAR,
mockErrorReporter);
journal.format(FAKE_NSINFO);
}
@ -179,7 +180,8 @@ public void testRestartJournal() throws Exception {
journal.close(); // close to unlock the storage dir
// Now re-instantiate, make sure history is still there
journal = new Journal(conf, TEST_LOG_DIR, JID, mockErrorReporter);
journal = new Journal(conf, TEST_LOG_DIR, JID, StartupOption.REGULAR,
mockErrorReporter);
// The storage info should be read, even if no writer has taken over.
assertEquals(storageString,
@ -239,7 +241,8 @@ public void testJournalLocking() throws Exception {
journal.newEpoch(FAKE_NSINFO, 1);
try {
new Journal(conf, TEST_LOG_DIR, JID, mockErrorReporter);
new Journal(conf, TEST_LOG_DIR, JID, StartupOption.REGULAR,
mockErrorReporter);
fail("Did not fail to create another journal in same dir");
} catch (IOException ioe) {
GenericTestUtils.assertExceptionContains(
@ -250,7 +253,8 @@ public void testJournalLocking() throws Exception {
// Journal should no longer be locked after the close() call.
// Hence, should be able to create a new Journal in the same dir.
Journal journal2 = new Journal(conf, TEST_LOG_DIR, JID, mockErrorReporter);
Journal journal2 = new Journal(conf, TEST_LOG_DIR, JID,
StartupOption.REGULAR, mockErrorReporter);
journal2.newEpoch(FAKE_NSINFO, 2);
journal2.close();
}
@ -279,7 +283,8 @@ public void testFinalizeWhenEditsAreMissed() throws Exception {
// Check that, even if we re-construct the journal by scanning the
// disk, we don't allow finalizing incorrectly.
journal.close();
journal = new Journal(conf, TEST_LOG_DIR, JID, mockErrorReporter);
journal = new Journal(conf, TEST_LOG_DIR, JID, StartupOption.REGULAR,
mockErrorReporter);
try {
journal.finalizeLogSegment(makeRI(4), 1, 6);

44
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/ha/TestHAStateTransitions.java
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@ -28,6 +28,7 @@
import java.io.IOException;
import java.net.URI;
import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.locks.ReentrantReadWriteLock;
import org.apache.commons.logging.Log;
@ -41,8 +42,12 @@
import org.apache.hadoop.ha.HAServiceProtocol.StateChangeRequestInfo;
import org.apache.hadoop.hdfs.DFSConfigKeys;
import org.apache.hadoop.hdfs.DFSTestUtil;
import org.apache.hadoop.hdfs.DFSUtil;
import org.apache.hadoop.hdfs.HAUtil;
import org.apache.hadoop.hdfs.HdfsConfiguration;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.MiniDFSNNTopology;
import org.apache.hadoop.hdfs.protocol.ClientProtocol;
import org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenIdentifier;
import org.apache.hadoop.hdfs.server.common.Storage.StorageDirectory;
import org.apache.hadoop.hdfs.server.namenode.EditLogFileOutputStream;
@ -558,6 +563,45 @@ public void testSecretManagerState() throws Exception {
}
}
/**
* This test also serves to test
* {@link HAUtil#getProxiesForAllNameNodesInNameservice(Configuration, String)} and
* {@link DFSUtil#getRpcAddressesForNameserviceId(Configuration, String, String)}
* by virtue of the fact that it wouldn't work properly if the proxies
* returned were not for the correct NNs.
*/
@Test
public void testIsAtLeastOneActive() throws Exception {
MiniDFSCluster cluster = new MiniDFSCluster.Builder(new HdfsConfiguration())
.nnTopology(MiniDFSNNTopology.simpleHATopology())
.numDataNodes(0)
.build();
try {
Configuration conf = new HdfsConfiguration();
HATestUtil.setFailoverConfigurations(cluster, conf);
List<ClientProtocol> namenodes =
HAUtil.getProxiesForAllNameNodesInNameservice(conf,
HATestUtil.getLogicalHostname(cluster));
assertEquals(2, namenodes.size());
assertFalse(HAUtil.isAtLeastOneActive(namenodes));
cluster.transitionToActive(0);
assertTrue(HAUtil.isAtLeastOneActive(namenodes));
cluster.transitionToStandby(0);
assertFalse(HAUtil.isAtLeastOneActive(namenodes));
cluster.transitionToActive(1);
assertTrue(HAUtil.isAtLeastOneActive(namenodes));
cluster.transitionToStandby(1);
assertFalse(HAUtil.isAtLeastOneActive(namenodes));
} finally {
if (cluster != null) {
cluster.shutdown();
}
}
}
private boolean isDTRunning(NameNode nn) {
return NameNodeAdapter.getDtSecretManager(nn.getNamesystem()).isRunning();
}