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Handle interruption for BerkeleyJE backend
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Fixes #2120

Signed-off-by: Pavel Ershov <owner.mad.epa@gmail.com>
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@mad
mad committed Sep 16, 2023
1 parent 6681799 commit de6260c
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Showing 10 changed files with 258 additions and 159 deletions.
48 changes: 37 additions & 11 deletions ...rkeleyje/src/main/java/org/janusgraph/diskstorage/berkeleyje/BerkeleyJEKeyValueStore.java
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Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,7 @@
import com.sleepycat.je.OperationStatus;
import com.sleepycat.je.Put;
import com.sleepycat.je.ReadOptions;
import com.sleepycat.je.ThreadInterruptedException;
import com.sleepycat.je.Transaction;
import com.sleepycat.je.WriteOptions;
import org.janusgraph.diskstorage.BackendException;
Expand All @@ -50,6 +51,8 @@
import java.util.concurrent.TimeUnit;
import java.util.function.Function;

import static org.janusgraph.diskstorage.berkeleyje.BerkeleyJEStoreManager.convertThreadInterruptedException;

public class BerkeleyJEKeyValueStore implements OrderedKeyValueStore {

private static final Logger log = LoggerFactory.getLogger(BerkeleyJEKeyValueStore.class);
Expand All @@ -60,7 +63,7 @@ public class BerkeleyJEKeyValueStore implements OrderedKeyValueStore {
public static Function<Integer, Integer> ttlConverter = ttl -> (int) Math.max(1, Duration.of(ttl, ChronoUnit.SECONDS).toHours());


private final Database db;
private Database db;
private final String name;
private final BerkeleyJEStoreManager manager;
private boolean isOpen;
Expand Down Expand Up @@ -100,10 +103,16 @@ private static void closeCursor(StoreTransaction txh, Cursor cursor) {
((BerkeleyJETx) txh).closeCursor(cursor);
}

void reopen(final Database db) {
this.db = db;
}

@Override
public synchronized void close() throws BackendException {
try {
if(isOpen) db.close();
if (isOpen) db.close();
} catch (ThreadInterruptedException ignored) {
// environment will be closed
} catch (DatabaseException e) {
throw new PermanentBackendException(e);
}
Expand Down Expand Up @@ -153,6 +162,7 @@ public RecordIterator<KeyValueEntry> getSlice(KVQuery query, StoreTransaction tx
final DatabaseEntry foundKey = keyStart.as(ENTRY_FACTORY);
final DatabaseEntry foundData = new DatabaseEntry();
final Cursor cursor = openCursor(txh);
final ReadOptions readOptions = getReadOptions(txh);

return new RecordIterator<KeyValueEntry>() {
private OperationStatus status;
Expand Down Expand Up @@ -182,9 +192,9 @@ private KeyValueEntry getNextEntry() {
}
while (!selector.reachedLimit()) {
if (status == null) {
status = cursor.get(foundKey, foundData, Get.SEARCH_GTE, getReadOptions(txh)) == null ? OperationStatus.NOTFOUND : OperationStatus.SUCCESS;
status = get(Get.SEARCH_GTE, readOptions);
} else {
status = cursor.get(foundKey, foundData, Get.NEXT, getReadOptions(txh)) == null ? OperationStatus.NOTFOUND : OperationStatus.SUCCESS;
status = get(Get.NEXT, readOptions);
}
if (status != OperationStatus.SUCCESS) {
break;
Expand All @@ -203,6 +213,16 @@ private KeyValueEntry getNextEntry() {
return null;
}

private OperationStatus get(Get get, ReadOptions readOptions) {
try {
return cursor.get(foundKey, foundData, get, readOptions) == null
? OperationStatus.NOTFOUND
: OperationStatus.SUCCESS;
} catch (ThreadInterruptedException e) {
throw convertThreadInterruptedException(e);
}
}

@Override
public void close() {
closeCursor(txh, cursor);
Expand Down Expand Up @@ -237,13 +257,17 @@ public void insert(StaticBuffer key, StaticBuffer value, StoreTransaction txh, b
int convertedTtl = ttlConverter.apply(ttl);
writeOptions.setTTL(convertedTtl, TimeUnit.HOURS);
}
if (allowOverwrite) {
OperationResult result = db.put(tx, key.as(ENTRY_FACTORY), value.as(ENTRY_FACTORY), Put.OVERWRITE, writeOptions);
EnvironmentFailureException.assertState(result != null);
status = OperationStatus.SUCCESS;
} else {
OperationResult result = db.put(tx, key.as(ENTRY_FACTORY), value.as(ENTRY_FACTORY), Put.NO_OVERWRITE, writeOptions);
status = result == null ? OperationStatus.KEYEXIST : OperationStatus.SUCCESS;
try {
if (allowOverwrite) {
OperationResult result = db.put(tx, key.as(ENTRY_FACTORY), value.as(ENTRY_FACTORY), Put.OVERWRITE, writeOptions);
EnvironmentFailureException.assertState(result != null);
status = OperationStatus.SUCCESS;
} else {
OperationResult result = db.put(tx, key.as(ENTRY_FACTORY), value.as(ENTRY_FACTORY), Put.NO_OVERWRITE, writeOptions);
status = result == null ? OperationStatus.KEYEXIST : OperationStatus.SUCCESS;
}
} catch (ThreadInterruptedException e) {
throw convertThreadInterruptedException(e);
}

if (status != OperationStatus.SUCCESS) {
Expand All @@ -261,6 +285,8 @@ public void delete(StaticBuffer key, StoreTransaction txh) throws BackendExcepti
if (status != OperationStatus.SUCCESS && status != OperationStatus.NOTFOUND) {
throw new PermanentBackendException("Could not remove: " + status);
}
} catch (ThreadInterruptedException e) {
throw convertThreadInterruptedException(e);
} catch (DatabaseException e) {
throw new PermanentBackendException(e);
}
Expand Down
132 changes: 80 additions & 52 deletions ...erkeleyje/src/main/java/org/janusgraph/diskstorage/berkeleyje/BerkeleyJEStoreManager.java
View file
Original file line number Diff line number Diff line change
Expand Up @@ -14,7 +14,6 @@

package org.janusgraph.diskstorage.berkeleyje;


import com.google.common.base.Preconditions;
import com.sleepycat.je.CacheMode;
import com.sleepycat.je.Database;
Expand All @@ -23,8 +22,10 @@
import com.sleepycat.je.Environment;
import com.sleepycat.je.EnvironmentConfig;
import com.sleepycat.je.LockMode;
import com.sleepycat.je.ThreadInterruptedException;
import com.sleepycat.je.Transaction;
import com.sleepycat.je.TransactionConfig;
import org.apache.tinkerpop.gremlin.process.traversal.util.TraversalInterruptedException;
import org.janusgraph.diskstorage.BackendException;
import org.janusgraph.diskstorage.BaseTransactionConfig;
import org.janusgraph.diskstorage.PermanentBackendException;
Expand All @@ -51,6 +52,7 @@
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.atomic.AtomicReference;

import static org.janusgraph.diskstorage.configuration.ConfigOption.disallowEmpty;

Expand Down Expand Up @@ -90,17 +92,14 @@ public class BerkeleyJEStoreManager extends LocalStoreManager implements Ordered

private final Map<String, BerkeleyJEKeyValueStore> stores;

protected Environment environment;
protected AtomicReference<Environment> environment = new AtomicReference<>();
protected final StoreFeatures features;

public BerkeleyJEStoreManager(Configuration configuration) throws BackendException {
super(configuration);
stores = new HashMap<>();

int cachePercentage = configuration.get(JVM_CACHE);
boolean sharedCache = configuration.get(SHARED_CACHE);
CacheMode cacheMode = ConfigOption.getEnumValue(configuration.get(CACHE_MODE), CacheMode.class);
initialize(cachePercentage, sharedCache, cacheMode);
initialize(configuration);

features = new StandardStoreFeatures.Builder()
.orderedScan(true)
Expand All @@ -117,7 +116,10 @@ public BerkeleyJEStoreManager(Configuration configuration) throws BackendExcepti
.build();
}

private void initialize(int cachePercent, final boolean sharedCache, final CacheMode cacheMode) throws BackendException {
private void initialize(Configuration configuration) throws BackendException {
int cachePercent = configuration.get(JVM_CACHE);
boolean sharedCache = configuration.get(SHARED_CACHE);
CacheMode cacheMode = ConfigOption.getEnumValue(configuration.get(CACHE_MODE), CacheMode.class);
try {
EnvironmentConfig envConfig = new EnvironmentConfig();
envConfig.setAllowCreate(true);
Expand All @@ -132,7 +134,7 @@ private void initialize(int cachePercent, final boolean sharedCache, final Cache
}

//Open the environment
environment = new Environment(directory, envConfig);
environment.set(new Environment(directory, envConfig));

} catch (DatabaseException e) {
throw new PermanentBackendException("Error during BerkeleyJE initialization: ", e);
Expand All @@ -152,39 +154,56 @@ public List<KeyRange> getLocalKeyPartition() throws BackendException {

@Override
public BerkeleyJETx beginTransaction(final BaseTransactionConfig txCfg) throws BackendException {
try {
Transaction tx = null;
boolean interrupted = false;
do {
try {
Transaction tx = null;

Configuration effectiveCfg =
Configuration effectiveCfg =
new MergedConfiguration(txCfg.getCustomOptions(), getStorageConfig());

if (transactional) {
TransactionConfig txnConfig = new TransactionConfig();
ConfigOption.getEnumValue(effectiveCfg.get(ISOLATION_LEVEL), IsolationLevel.class).configure(txnConfig);
tx = environment.beginTransaction(null, txnConfig);
} else {
if (txCfg instanceof TransactionConfiguration) {
if (!((TransactionConfiguration) txCfg).isSingleThreaded()) {
// Non-transactional cursors can't shared between threads, more info ThreadLocker.checkState
throw new PermanentBackendException("BerkeleyJE does not support non-transactional for multi threaded tx");
if (transactional) {
TransactionConfig txnConfig = new TransactionConfig();
ConfigOption.getEnumValue(effectiveCfg.get(ISOLATION_LEVEL), IsolationLevel.class).configure(txnConfig);
tx = environment.get().beginTransaction(null, txnConfig);
} else {
if (txCfg instanceof TransactionConfiguration) {
if (!((TransactionConfiguration) txCfg).isSingleThreaded()) {
// Non-transactional cursors can't shared between threads, more info ThreadLocker.checkState
throw new PermanentBackendException("BerkeleyJE does not support non-transactional for multi threaded tx");
}
}
}
}
BerkeleyJETx btx =
new BerkeleyJETx(
tx,
ConfigOption.getEnumValue(effectiveCfg.get(LOCK_MODE), LockMode.class),
ConfigOption.getEnumValue(effectiveCfg.get(CACHE_MODE), CacheMode.class),
txCfg);

if (log.isTraceEnabled()) {
log.trace("Berkeley tx created", new TransactionBegin(btx.toString()));
}
BerkeleyJETx btx =
new BerkeleyJETx(
tx,
ConfigOption.getEnumValue(effectiveCfg.get(LOCK_MODE), LockMode.class),
ConfigOption.getEnumValue(effectiveCfg.get(CACHE_MODE), CacheMode.class),
txCfg);

if (log.isTraceEnabled()) {
log.trace("Berkeley tx created", new TransactionBegin(btx.toString()));
}

return btx;
} catch (DatabaseException e) {
throw new PermanentBackendException("Could not start BerkeleyJE transaction", e);
}
return btx;
} catch (ThreadInterruptedException e) {
log.error("BerkeleyJE backend is interrupted! Try to recreate environment", e);
environment.get().close();
initialize(storageConfig);
for (Map.Entry<String, BerkeleyJEKeyValueStore> entry : stores.entrySet()) {
final String name = entry.getKey();
final BerkeleyJEKeyValueStore store = entry.getValue();
store.reopen(openDb(name));
}
if (!interrupted) {
interrupted = true;
} else {
throw new PermanentBackendException("Could not start BerkeleyJE transaction", e);
}
} catch (DatabaseException e) {
throw new PermanentBackendException("Could not start BerkeleyJE transaction", e);
}
} while (true);
}

@Override
Expand All @@ -194,19 +213,8 @@ public BerkeleyJEKeyValueStore openDatabase(String name) throws BackendException
return stores.get(name);
}
try {
DatabaseConfig dbConfig = new DatabaseConfig();
dbConfig.setReadOnly(false);
dbConfig.setAllowCreate(true);
dbConfig.setTransactional(transactional);
dbConfig.setKeyPrefixing(true);

if (batchLoading) {
dbConfig.setDeferredWrite(true);
}

Database db = environment.openDatabase(null, name, dbConfig);

log.debug("Opened database {}", name);
Database db = openDb(name);
log.trace("Opened database {}", name);

BerkeleyJEKeyValueStore store = new BerkeleyJEKeyValueStore(name, db, this);
stores.put(name, store);
Expand All @@ -216,6 +224,20 @@ public BerkeleyJEKeyValueStore openDatabase(String name) throws BackendException
}
}

private Database openDb(String name) {
DatabaseConfig dbConfig = new DatabaseConfig();
dbConfig.setReadOnly(false);
dbConfig.setAllowCreate(true);
dbConfig.setTransactional(transactional);
dbConfig.setKeyPrefixing(true);

if (batchLoading) {
dbConfig.setDeferredWrite(true);
}

return environment.get().openDatabase(null, name, dbConfig);
}

@Override
public void mutateMany(Map<String, KVMutation> mutations, StoreTransaction txh) throws BackendException {
for (Map.Entry<String,KVMutation> mutation : mutations.entrySet()) {
Expand Down Expand Up @@ -266,7 +288,7 @@ public void close() throws BackendException {
//Ignore
}
try {
environment.close();
environment.get().close();
} catch (DatabaseException e) {
throw new PermanentBackendException("Could not close BerkeleyJE database", e);
}
Expand All @@ -282,8 +304,8 @@ public void clearStorage() throws BackendException {
throw new IllegalStateException("Cannot delete store, since database is open: " + stores.keySet());
}

for (final String db : environment.getDatabaseNames()) {
environment.removeDatabase(NULL_TRANSACTION, db);
for (final String db : environment.get().getDatabaseNames()) {
environment.get().removeDatabase(NULL_TRANSACTION, db);
log.debug("Removed database {} (clearStorage)", db);
}
close();
Expand All @@ -292,7 +314,7 @@ public void clearStorage() throws BackendException {

@Override
public boolean exists() throws BackendException {
return !environment.getDatabaseNames().isEmpty();
return !environment.get().getDatabaseNames().isEmpty();
}

@Override
Expand Down Expand Up @@ -335,4 +357,10 @@ private TransactionBegin(String msg) {
super(msg);
}
}

static TraversalInterruptedException convertThreadInterruptedException(final ThreadInterruptedException e) {
final TraversalInterruptedException ex = new TraversalInterruptedException();
ex.initCause(e);
return ex;
}
}
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