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HDFS-7131. During HA upgrade, JournalNode should create a new committedTxnId file in the current directory. Contributed by Jing Zhao.

This commit is contained in:
Jing Zhao 2014-09-25 17:15:33 -07:00
parent 8269bfa613
commit e9c37de485
4 changed files with 68 additions and 14 deletions
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3
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -961,6 +961,9 @@ Release 2.6.0 - UNRELEASED
HDFS-7127. TestLeaseRecovery leaks MiniDFSCluster instances. (cnauroth)
HDFS-7131. During HA upgrade, JournalNode should create a new committedTxnId
file in the current directory. (jing9)
Release 2.5.1 - 2014-09-05
INCOMPATIBLE CHANGES

23
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/qjournal/server/Journal.java
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@ -990,7 +990,7 @@ public class Journal implements Closeable {
public synchronized void doPreUpgrade() throws IOException {
// Do not hold file lock on committedTxnId, because the containing
// directory will be renamed. It will be reopened lazily on next access.
committedTxnId.close();
IOUtils.cleanup(LOG, committedTxnId);
storage.getJournalManager().doPreUpgrade();
}
@ -1015,14 +1015,25 @@ public class Journal implements Closeable {
new File(previousDir, LAST_PROMISED_FILENAME), 0);
PersistentLongFile prevLastWriterEpoch = new PersistentLongFile(
new File(previousDir, LAST_WRITER_EPOCH), 0);
BestEffortLongFile prevCommittedTxnId = new BestEffortLongFile(
new File(previousDir, COMMITTED_TXID_FILENAME),
HdfsConstants.INVALID_TXID);
lastPromisedEpoch = new PersistentLongFile(
new File(currentDir, LAST_PROMISED_FILENAME), 0);
lastWriterEpoch = new PersistentLongFile(
new File(currentDir, LAST_WRITER_EPOCH), 0);
lastPromisedEpoch.set(prevLastPromisedEpoch.get());
lastWriterEpoch.set(prevLastWriterEpoch.get());
committedTxnId = new BestEffortLongFile(
new File(currentDir, COMMITTED_TXID_FILENAME),
HdfsConstants.INVALID_TXID);
try {
lastPromisedEpoch.set(prevLastPromisedEpoch.get());
lastWriterEpoch.set(prevLastWriterEpoch.get());
committedTxnId.set(prevCommittedTxnId.get());
} finally {
IOUtils.cleanup(LOG, prevCommittedTxnId);
}
}
public synchronized void doFinalize() throws IOException {
@ -1043,7 +1054,7 @@ public class Journal implements Closeable {
public synchronized void doRollback() throws IOException {
// Do not hold file lock on committedTxnId, because the containing
// directory will be renamed. It will be reopened lazily on next access.
committedTxnId.close();
IOUtils.cleanup(LOG, committedTxnId);
storage.getJournalManager().doRollback();
}

6
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/qjournal/server/JournalNode.java
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@ -26,6 +26,7 @@ import java.util.Map;
import javax.management.ObjectName;
import com.google.common.annotations.VisibleForTesting;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.classification.InterfaceAudience;
@ -92,8 +93,9 @@ public class JournalNode implements Tool, Configurable, JournalNodeMXBean {
return journal;
}
Journal getOrCreateJournal(String jid) throws IOException {
@VisibleForTesting
public Journal getOrCreateJournal(String jid) throws IOException {
return getOrCreateJournal(jid, StartupOption.REGULAR);
}

50
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/ha/TestDFSUpgradeWithHA.java
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@ -38,19 +38,23 @@ import org.apache.hadoop.hdfs.DFSConfigKeys;
import org.apache.hadoop.hdfs.HdfsConfiguration;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.MiniDFSNNTopology;
import org.apache.hadoop.hdfs.protocol.HdfsConstants;
import org.apache.hadoop.hdfs.qjournal.MiniQJMHACluster;
import org.apache.hadoop.hdfs.qjournal.MiniQJMHACluster.Builder;
import org.apache.hadoop.hdfs.qjournal.server.Journal;
import org.apache.hadoop.hdfs.qjournal.server.JournalNode;
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.StartupOption;
import org.apache.hadoop.hdfs.server.common.Storage;
import org.apache.hadoop.hdfs.server.namenode.NameNode;
import org.apache.hadoop.hdfs.tools.DFSAdmin;
import org.apache.hadoop.hdfs.util.BestEffortLongFile;
import org.apache.hadoop.hdfs.util.PersistentLongFile;
import org.apache.hadoop.test.GenericTestUtils;
import org.junit.Before;
import org.junit.Test;
import com.google.common.base.Joiner;
import org.mockito.internal.util.reflection.Whitebox;
/**
* Tests for upgrading with HA enabled.
@ -294,6 +298,16 @@ public class TestDFSUpgradeWithHA {
}
}
private long getCommittedTxnIdValue(MiniQJMHACluster qjCluster)
throws IOException {
Journal journal1 = qjCluster.getJournalCluster().getJournalNode(0)
.getOrCreateJournal(MiniQJMHACluster.NAMESERVICE);
BestEffortLongFile committedTxnId = (BestEffortLongFile) Whitebox
.getInternalState(journal1, "committedTxnId");
return committedTxnId != null ? committedTxnId.get() :
HdfsConstants.INVALID_TXID;
}
/**
* Make sure that an HA NN can successfully upgrade when configured using
* JournalNodes.
@ -320,7 +334,10 @@ public class TestDFSUpgradeWithHA {
cluster.transitionToActive(0);
fs = HATestUtil.configureFailoverFs(cluster, conf);
assertTrue(fs.mkdirs(new Path("/foo1")));
// get the value of the committedTxnId in journal nodes
final long cidBeforeUpgrade = getCommittedTxnIdValue(qjCluster);
// Do the upgrade. Shut down NN1 and then restart NN0 with the upgrade
// flag.
cluster.shutdownNameNode(1);
@ -330,6 +347,8 @@ public class TestDFSUpgradeWithHA {
checkNnPreviousDirExistence(cluster, 0, true);
checkNnPreviousDirExistence(cluster, 1, false);
checkJnPreviousDirExistence(qjCluster, true);
assertTrue(cidBeforeUpgrade <= getCommittedTxnIdValue(qjCluster));
// NN0 should come up in the active state when given the -upgrade option,
// so no need to transition it to active.
@ -342,6 +361,8 @@ public class TestDFSUpgradeWithHA {
// Make sure we can still do FS ops after upgrading.
cluster.transitionToActive(0);
assertTrue(fs.mkdirs(new Path("/foo3")));
assertTrue(getCommittedTxnIdValue(qjCluster) > cidBeforeUpgrade);
// Now bootstrap the standby with the upgraded info.
int rc = BootstrapStandby.run(
@ -388,15 +409,18 @@ public class TestDFSUpgradeWithHA {
cluster.transitionToActive(0);
fs = HATestUtil.configureFailoverFs(cluster, conf);
assertTrue(fs.mkdirs(new Path("/foo1")));
final long cidBeforeUpgrade = getCommittedTxnIdValue(qjCluster);
// Do the upgrade. Shut down NN1 and then restart NN0 with the upgrade
// flag.
cluster.shutdownNameNode(1);
cluster.getNameNodeInfos()[0].setStartOpt(StartupOption.UPGRADE);
cluster.restartNameNode(0, false);
assertTrue(cidBeforeUpgrade <= getCommittedTxnIdValue(qjCluster));
assertTrue(fs.mkdirs(new Path("/foo2")));
checkNnPreviousDirExistence(cluster, 0, true);
checkNnPreviousDirExistence(cluster, 1, false);
checkJnPreviousDirExistence(qjCluster, true);
@ -408,9 +432,13 @@ public class TestDFSUpgradeWithHA {
assertEquals(0, rc);
cluster.restartNameNode(1);
final long cidDuringUpgrade = getCommittedTxnIdValue(qjCluster);
assertTrue(cidDuringUpgrade > cidBeforeUpgrade);
runFinalizeCommand(cluster);
assertEquals(cidDuringUpgrade, getCommittedTxnIdValue(qjCluster));
checkClusterPreviousDirExistence(cluster, false);
checkJnPreviousDirExistence(qjCluster, false);
assertCTimesEqual(cluster);
@ -614,7 +642,9 @@ public class TestDFSUpgradeWithHA {
cluster.transitionToActive(0);
fs = HATestUtil.configureFailoverFs(cluster, conf);
assertTrue(fs.mkdirs(new Path("/foo1")));
final long cidBeforeUpgrade = getCommittedTxnIdValue(qjCluster);
// Do the upgrade. Shut down NN1 and then restart NN0 with the upgrade
// flag.
cluster.shutdownNameNode(1);
@ -628,7 +658,10 @@ public class TestDFSUpgradeWithHA {
// NN0 should come up in the active state when given the -upgrade option,
// so no need to transition it to active.
assertTrue(fs.mkdirs(new Path("/foo2")));
final long cidDuringUpgrade = getCommittedTxnIdValue(qjCluster);
assertTrue(cidDuringUpgrade > cidBeforeUpgrade);
// Now bootstrap the standby with the upgraded info.
int rc = BootstrapStandby.run(
new String[]{"-force"},
@ -649,6 +682,11 @@ public class TestDFSUpgradeWithHA {
conf.setStrings(DFSConfigKeys.DFS_NAMENODE_NAME_DIR_KEY, Joiner.on(",").join(nn1NameDirs));
NameNode.doRollback(conf, false);
final long cidAfterRollback = getCommittedTxnIdValue(qjCluster);
assertTrue(cidBeforeUpgrade < cidAfterRollback);
// make sure the committedTxnId has been reset correctly after rollback
assertTrue(cidDuringUpgrade > cidAfterRollback);
// The rollback operation should have rolled back the first NN's local
// dirs, and the shared dir, but not the other NN's dirs. Those have to be
// done by bootstrapping the standby.