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YARN-9063. ATS 1.5 fails to start if RollingLevelDb files are corrupt… #3728

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Merged
aajisaka merged 6 commits into from
Dec 6, 2021
Merged

YARN-9063. ATS 1.5 fails to start if RollingLevelDb files are corrupt… #3728

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10177a8
YARN-9063. ATS 1.5 fails to start if RollingLevelDb files are corrupt…
hotcodemacha Nov 26, 2021
bd3aad7
formatting code
hotcodemacha Nov 26, 2021
57a3f62
creating common method loadOrRepairLevelDb
hotcodemacha Dec 1, 2021
b50a73a
removing unused imports
hotcodemacha Dec 1, 2021
9b6e8f1
removing extra line
hotcodemacha Dec 3, 2021
b384b55
Adding logging message
hotcodemacha Dec 3, 2021
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18 changes: 2 additions & 16 deletions ...oryservice/src/main/java/org/apache/hadoop/yarn/server/timeline/LeveldbTimelineStore.java
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Original file line number Diff line number Diff line change
Expand Up @@ -21,7 +21,6 @@
import org.apache.hadoop.classification.VisibleForTesting;
import org.apache.hadoop.util.Preconditions;
import org.apache.commons.collections.map.LRUMap;
import org.apache.commons.io.FileUtils;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceAudience.Private;
import org.apache.hadoop.classification.InterfaceStability;
Expand All @@ -32,7 +31,6 @@
import org.apache.hadoop.io.IOUtils;
import org.apache.hadoop.io.WritableComparator;
import org.apache.hadoop.service.AbstractService;
import org.apache.hadoop.util.Time;
import org.apache.hadoop.yarn.api.records.timeline.*;
import org.apache.hadoop.yarn.api.records.timeline.TimelineEvents.EventsOfOneEntity;
import org.apache.hadoop.yarn.api.records.timeline.TimelinePutResponse.TimelinePutError;
Expand All @@ -41,14 +39,14 @@
import org.apache.hadoop.yarn.server.records.Version;
import org.apache.hadoop.yarn.server.records.impl.pb.VersionPBImpl;
import org.apache.hadoop.yarn.server.timeline.TimelineDataManager.CheckAcl;
import org.apache.hadoop.yarn.server.timeline.util.LeveldbUtils;
import org.apache.hadoop.yarn.server.timeline.util.LeveldbUtils.KeyBuilder;
import org.apache.hadoop.yarn.server.timeline.util.LeveldbUtils.KeyParser;
import org.apache.hadoop.yarn.server.utils.LeveldbIterator;
import org.fusesource.leveldbjni.JniDBFactory;
import org.iq80.leveldb.*;
import org.slf4j.LoggerFactory;

import java.io.File;
import java.io.IOException;
import java.nio.charset.Charset;
import java.util.*;
Expand Down Expand Up @@ -242,19 +240,7 @@ protected void serviceInit(Configuration conf) throws Exception {
IOUtils.cleanupWithLogger(LOG, localFS);
}
LOG.info("Using leveldb path " + dbPath);
try {
db = factory.open(new File(dbPath.toString()), options);
} catch (IOException ioe) {
File dbFile = new File(dbPath.toString());
File backupPath = new File(
dbPath.toString() + BACKUP_EXT + Time.monotonicNow());
LOG.warn("Incurred exception while loading LevelDb database. Backing " +
"up at "+ backupPath, ioe);
FileUtils.copyDirectory(dbFile, backupPath);
LOG.warn("Going to try repair");
factory.repair(dbFile, options);
db = factory.open(dbFile, options);
}
db = LeveldbUtils.loadOrRepairLevelDb(factory, dbPath, options);
checkVersion();
startTimeWriteCache =
Collections.synchronizedMap(new LRUMap(getStartTimeWriteCacheSize(
Expand Down
27 changes: 20 additions & 7 deletions ...ice/src/main/java/org/apache/hadoop/yarn/server/timeline/RollingLevelDBTimelineStore.java
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Original file line number Diff line number Diff line change
Expand Up @@ -21,7 +21,6 @@
import org.apache.hadoop.classification.VisibleForTesting;
import org.apache.hadoop.util.Preconditions;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
Expand Down Expand Up @@ -62,6 +61,7 @@
import org.apache.hadoop.yarn.server.records.impl.pb.VersionPBImpl;
import org.apache.hadoop.yarn.server.timeline.RollingLevelDB.RollingWriteBatch;
import org.apache.hadoop.yarn.server.timeline.TimelineDataManager.CheckAcl;
import org.apache.hadoop.yarn.server.timeline.util.LeveldbUtils;
import org.apache.hadoop.yarn.server.timeline.util.LeveldbUtils.KeyBuilder;
import org.apache.hadoop.yarn.server.timeline.util.LeveldbUtils.KeyParser;

Expand Down Expand Up @@ -199,6 +199,11 @@ public class RollingLevelDBTimelineStore extends AbstractService implements
static final String STARTTIME = "starttime-ldb";
static final String OWNER = "owner-ldb";

@VisibleForTesting
//Extension to FILENAME where backup will be stored in case we need to
//call LevelDb recovery
static final String BACKUP_EXT = ".backup-";

private static final byte[] DOMAIN_ID_COLUMN = "d".getBytes(UTF_8);
private static final byte[] EVENTS_COLUMN = "e".getBytes(UTF_8);
private static final byte[] PRIMARY_FILTERS_COLUMN = "f".getBytes(UTF_8);
Expand Down Expand Up @@ -240,6 +245,12 @@ public RollingLevelDBTimelineStore() {
super(RollingLevelDBTimelineStore.class.getName());
}

private JniDBFactory factory;
@VisibleForTesting
void setFactory(JniDBFactory fact) {
this.factory = fact;
}

@Override
@SuppressWarnings("unchecked")
protected void serviceInit(Configuration conf) throws Exception {
Expand Down Expand Up @@ -284,7 +295,9 @@ protected void serviceInit(Configuration conf) throws Exception {
options.cacheSize(conf.getLong(
TIMELINE_SERVICE_LEVELDB_READ_CACHE_SIZE,
DEFAULT_TIMELINE_SERVICE_LEVELDB_READ_CACHE_SIZE));
JniDBFactory factory = new JniDBFactory();
if(factory == null) {
factory = new JniDBFactory();
}
Path dbPath = new Path(
conf.get(TIMELINE_SERVICE_LEVELDB_PATH), FILENAME);
Path domainDBPath = new Path(dbPath, DOMAIN);
Expand Down Expand Up @@ -327,13 +340,13 @@ protected void serviceInit(Configuration conf) throws Exception {
TIMELINE_SERVICE_LEVELDB_WRITE_BUFFER_SIZE,
DEFAULT_TIMELINE_SERVICE_LEVELDB_WRITE_BUFFER_SIZE));
LOG.info("Using leveldb path " + dbPath);
domaindb = factory.open(new File(domainDBPath.toString()), options);
domaindb = LeveldbUtils.loadOrRepairLevelDb(factory, domainDBPath, options);
entitydb = new RollingLevelDB(ENTITY);
entitydb.init(conf);
indexdb = new RollingLevelDB(INDEX);
indexdb.init(conf);
starttimedb = factory.open(new File(starttimeDBPath.toString()), options);
ownerdb = factory.open(new File(ownerDBPath.toString()), options);
starttimedb = LeveldbUtils.loadOrRepairLevelDb(factory, starttimeDBPath, options);
ownerdb = LeveldbUtils.loadOrRepairLevelDb(factory, ownerDBPath, options);
checkVersion();
startTimeWriteCache = Collections.synchronizedMap(new LRUMap(
getStartTimeWriteCacheSize(conf)));
Expand All @@ -346,7 +359,7 @@ protected void serviceInit(Configuration conf) throws Exception {

super.serviceInit(conf);
}

@Override
protected void serviceStart() throws Exception {
if (getConfig().getBoolean(TIMELINE_SERVICE_TTL_ENABLE, true)) {
Expand Down Expand Up @@ -1816,4 +1829,4 @@ private static TimelineDomain getTimelineDomain(DBIterator iterator,
return domain;
}
}
}
}
32 changes: 32 additions & 0 deletions ...istoryservice/src/main/java/org/apache/hadoop/yarn/server/timeline/util/LeveldbUtils.java
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Expand Up @@ -19,16 +19,30 @@
package org.apache.hadoop.yarn.server.timeline.util;


import org.apache.commons.io.FileUtils;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.io.WritableComparator;
import org.apache.hadoop.util.Time;

import java.io.File;
import java.io.IOException;

import org.fusesource.leveldbjni.JniDBFactory;
import org.iq80.leveldb.DB;
import org.iq80.leveldb.Options;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import static java.nio.charset.StandardCharsets.UTF_8;
import static org.apache.hadoop.yarn.server.timeline.GenericObjectMapper.readReverseOrderedLong;

public class LeveldbUtils {

private static final String BACKUP_EXT = ".backup-";
private static final Logger LOG = LoggerFactory
.getLogger(LeveldbUtils.class);

/** A string builder utility for building timeline server leveldb keys. */
public static class KeyBuilder {
/** Maximum subkeys that can be added to construct a key. */
Expand Down Expand Up @@ -184,4 +198,22 @@ public static boolean prefixMatches(byte[] prefix, int prefixlen,
public static final FsPermission LEVELDB_DIR_UMASK = FsPermission
.createImmutable((short) 0700);

public static DB loadOrRepairLevelDb(JniDBFactory factory, Path dbPath, Options options)
throws IOException {
DB db;
try{
db = factory.open(new File(dbPath.toString()), options);
} catch (IOException ioe){
File dbFile = new File(dbPath.toString());
File dbBackupPath = new File(
dbPath.toString() + BACKUP_EXT + Time.monotonicNow());
LOG.warn("Incurred exception while loading LevelDb database. Backing " +
"up at "+ dbBackupPath, ioe);
FileUtils.copyDirectory(dbFile, dbBackupPath);
factory.repair(dbFile, options);
db = factory.open(dbFile, options);
}
return db;
}

}
38 changes: 37 additions & 1 deletion ...src/test/java/org/apache/hadoop/yarn/server/timeline/TestRollingLevelDBTimelineStore.java
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Original file line number Diff line number Diff line change
Expand Up @@ -21,8 +21,10 @@
import static org.junit.Assert.assertNotNull;

import java.io.File;
import java.io.FilenameFilter;
import java.io.IOException;

import org.apache.commons.io.filefilter.WildcardFileFilter;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.conf.Configuration;
Expand All @@ -38,11 +40,15 @@
import org.apache.hadoop.yarn.api.records.timeline.TimelinePutResponse.TimelinePutError;
import org.apache.hadoop.yarn.conf.YarnConfiguration;
import org.apache.hadoop.yarn.server.records.Version;

import org.fusesource.leveldbjni.JniDBFactory;
import org.iq80.leveldb.Options;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.eclipse.jetty.util.log.Log;
import org.mockito.Mockito;

/** Test class to verify RollingLevelDBTimelineStore. */
@InterfaceAudience.Private
Expand Down Expand Up @@ -417,11 +423,41 @@ public void testStorePerformance() throws IOException {
Log.getLog().info("Duration for " + num + ": " + duration);
}

@Test
/**
* Test that RollingLevelDb repair is attempted at least once during
* serviceInit for RollingLeveldbTimelineStore in case open fails the
* first time.
*/ public void testLevelDbRepair() throws IOException {
RollingLevelDBTimelineStore store = new RollingLevelDBTimelineStore();
JniDBFactory factory = Mockito.mock(JniDBFactory.class);
Mockito.when(factory.open(Mockito.any(File.class), Mockito.any(Options.class)))
.thenThrow(new IOException()).thenCallRealMethod();
store.setFactory(factory);

//Create the LevelDb in a different location
File path = new File("target", this.getClass().getSimpleName() + "-tmpDir2").getAbsoluteFile();
Configuration conf = new Configuration(this.config);
conf.set(YarnConfiguration.TIMELINE_SERVICE_LEVELDB_PATH, path.getAbsolutePath());
try {
store.init(conf);
Mockito.verify(factory, Mockito.times(1))
.repair(Mockito.any(File.class), Mockito.any(Options.class));
FilenameFilter fileFilter =
new WildcardFileFilter("*" + RollingLevelDBTimelineStore.BACKUP_EXT + "*");
Assert.assertTrue(new File(path.getAbsolutePath(), RollingLevelDBTimelineStore.FILENAME)
.list(fileFilter).length > 0);
} finally {
store.close();
fsContext.delete(new Path(path.getAbsolutePath()), true);
}
}

public static void main(String[] args) throws Exception {
TestRollingLevelDBTimelineStore store =
new TestRollingLevelDBTimelineStore();
store.setup();
store.testStorePerformance();
store.tearDown();
}
}
}