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YARN-1984. LeveldbTimelineStore does not handle db exceptions properly. Contributed by Varun Saxena

This commit is contained in:
Jason Lowe 2014-11-24 22:36:59 +00:00
parent 2967c17fef
commit 1ce4d33c2d
3 changed files with 126 additions and 92 deletions
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3
hadoop-yarn-project/CHANGES.txt
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@ -135,6 +135,9 @@ Release 2.7.0 - UNRELEASED
YARN-2315. FairScheduler: Set current capacity in addition to capacity.
(Zhihai Xu via kasha)
YARN-1984. LeveldbTimelineStore does not handle db exceptions properly
(Varun Saxena via jlowe)
Release 2.6.0 - 2014-11-18
INCOMPATIBLE CHANGES

206
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/main/java/org/apache/hadoop/yarn/server/timeline/LeveldbTimelineStore.java
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@ -66,10 +66,10 @@
import org.apache.hadoop.yarn.proto.YarnServerCommonProtos.VersionProto;
import org.apache.hadoop.yarn.server.records.Version;
import org.apache.hadoop.yarn.server.records.impl.pb.VersionPBImpl;
import org.apache.hadoop.yarn.server.utils.LeveldbIterator;
import org.fusesource.leveldbjni.JniDBFactory;
import org.iq80.leveldb.DB;
import org.iq80.leveldb.DBException;
import org.iq80.leveldb.DBIterator;
import org.iq80.leveldb.Options;
import org.iq80.leveldb.ReadOptions;
import org.iq80.leveldb.WriteBatch;
@ -438,13 +438,15 @@ public TimelineEntity getEntity(String entityId, String entityType,
.add(entityType).add(writeReverseOrderedLong(revStartTime))
.add(entityId).getBytesForLookup();
DBIterator iterator = null;
LeveldbIterator iterator = null;
try {
iterator = db.iterator();
iterator = new LeveldbIterator(db);
iterator.seek(prefix);
return getEntity(entityId, entityType, revStartTime, fields, iterator,
prefix, prefix.length);
} catch(DBException e) {
throw new IOException(e);
} finally {
IOUtils.cleanup(LOG, iterator);
}
@ -455,7 +457,7 @@ public TimelineEntity getEntity(String entityId, String entityType,
* specified fields for this entity, return null.
*/
private static TimelineEntity getEntity(String entityId, String entityType,
Long startTime, EnumSet<Field> fields, DBIterator iterator,
Long startTime, EnumSet<Field> fields, LeveldbIterator iterator,
byte[] prefix, int prefixlen) throws IOException {
if (fields == null) {
fields = EnumSet.allOf(Field.class);
@ -562,7 +564,7 @@ public int compare(byte[] o1, byte[] o2) {
o2.length);
}
});
DBIterator iterator = null;
LeveldbIterator iterator = null;
try {
// look up start times for the specified entities
// skip entities with no start time
@ -606,7 +608,7 @@ public int compare(byte[] o1, byte[] o2) {
if (limit == null) {
limit = DEFAULT_LIMIT;
}
iterator = db.iterator();
iterator = new LeveldbIterator(db);
for (iterator.seek(first); entity.getEvents().size() < limit &&
iterator.hasNext(); iterator.next()) {
byte[] key = iterator.peekNext().getKey();
@ -623,6 +625,8 @@ public int compare(byte[] o1, byte[] o2) {
}
}
}
} catch(DBException e) {
throw new IOException(e);
} finally {
IOUtils.cleanup(LOG, iterator);
}
@ -683,7 +687,7 @@ private TimelineEntities getEntityByTime(byte[] base,
String entityType, Long limit, Long starttime, Long endtime,
String fromId, Long fromTs, Collection<NameValuePair> secondaryFilters,
EnumSet<Field> fields) throws IOException {
DBIterator iterator = null;
LeveldbIterator iterator = null;
try {
KeyBuilder kb = KeyBuilder.newInstance().add(base).add(entityType);
// only db keys matching the prefix (base + entity type) will be parsed
@ -724,7 +728,7 @@ private TimelineEntities getEntityByTime(byte[] base,
}
TimelineEntities entities = new TimelineEntities();
iterator = db.iterator();
iterator = new LeveldbIterator(db);
iterator.seek(first);
// iterate until one of the following conditions is met: limit is
// reached, there are no more keys, the key prefix no longer matches,
@ -783,10 +787,23 @@ private TimelineEntities getEntityByTime(byte[] base,
}
}
return entities;
} catch(DBException e) {
throw new IOException(e);
} finally {
IOUtils.cleanup(LOG, iterator);
}
}
/**
* Handle error and set it in response.
*/
private static void handleError(TimelineEntity entity, TimelinePutResponse response, final int errorCode) {
TimelinePutError error = new TimelinePutError();
error.setEntityId(entity.getEntityId());
error.setEntityType(entity.getEntityType());
error.setErrorCode(errorCode);
response.addError(error);
}
/**
* Put a single entity. If there is an error, add a TimelinePutError to the
@ -812,11 +829,7 @@ private void put(TimelineEntity entity, TimelinePutResponse response,
entity.getStartTime(), events);
if (startAndInsertTime == null) {
// if no start time is found, add an error and return
TimelinePutError error = new TimelinePutError();
error.setEntityId(entity.getEntityId());
error.setEntityType(entity.getEntityType());
error.setErrorCode(TimelinePutError.NO_START_TIME);
response.addError(error);
handleError(entity, response, TimelinePutError.NO_START_TIME);
return;
}
revStartTime = writeReverseOrderedLong(startAndInsertTime
@ -883,11 +896,7 @@ private void put(TimelineEntity entity, TimelinePutResponse response,
if (!domainId.equals(entity.getDomainId())) {
// in this case the entity will be put, but the relation will be
// ignored
TimelinePutError error = new TimelinePutError();
error.setEntityId(entity.getEntityId());
error.setEntityType(entity.getEntityType());
error.setErrorCode(TimelinePutError.FORBIDDEN_RELATION);
response.addError(error);
handleError(entity, response, TimelinePutError.FORBIDDEN_RELATION);
continue;
}
}
@ -933,11 +942,7 @@ private void put(TimelineEntity entity, TimelinePutResponse response,
if (entity.getDomainId() == null ||
entity.getDomainId().length() == 0) {
if (!allowEmptyDomainId) {
TimelinePutError error = new TimelinePutError();
error.setEntityId(entity.getEntityId());
error.setEntityType(entity.getEntityType());
error.setErrorCode(TimelinePutError.NO_DOMAIN);
response.addError(error);
handleError(entity, response, TimelinePutError.NO_DOMAIN);
return;
}
} else {
@ -946,14 +951,14 @@ private void put(TimelineEntity entity, TimelinePutResponse response,
entity.getDomainId().getBytes());
}
db.write(writeBatch);
} catch (DBException de) {
LOG.error("Error putting entity " + entity.getEntityId() +
" of type " + entity.getEntityType(), de);
handleError(entity, response, TimelinePutError.IO_EXCEPTION);
} catch (IOException e) {
LOG.error("Error putting entity " + entity.getEntityId() +
" of type " + entity.getEntityType(), e);
TimelinePutError error = new TimelinePutError();
error.setEntityId(entity.getEntityId());
error.setEntityType(entity.getEntityType());
error.setErrorCode(TimelinePutError.IO_EXCEPTION);
response.addError(error);
handleError(entity, response, TimelinePutError.IO_EXCEPTION);
} finally {
lock.unlock();
writeLocks.returnLock(lock);
@ -983,15 +988,16 @@ private void put(TimelineEntity entity, TimelinePutResponse response,
relatedEntity.getType(), relatedEntityStartTime),
writeReverseOrderedLong(relatedEntityStartAndInsertTime
.insertTime));
} catch (DBException de) {
LOG.error("Error putting related entity " + relatedEntity.getId() +
" of type " + relatedEntity.getType() + " for entity " +
entity.getEntityId() + " of type " + entity.getEntityType(), de);
handleError(entity, response, TimelinePutError.IO_EXCEPTION);
} catch (IOException e) {
LOG.error("Error putting related entity " + relatedEntity.getId() +
" of type " + relatedEntity.getType() + " for entity " +
entity.getEntityId() + " of type " + entity.getEntityType(), e);
TimelinePutError error = new TimelinePutError();
error.setEntityId(entity.getEntityId());
error.setEntityType(entity.getEntityType());
error.setErrorCode(TimelinePutError.IO_EXCEPTION);
response.addError(error);
handleError(entity, response, TimelinePutError.IO_EXCEPTION);
} finally {
lock.unlock();
writeLocks.returnLock(lock);
@ -1072,23 +1078,27 @@ private byte[] getStartTime(String entityId, String entityType)
private Long getStartTimeLong(String entityId, String entityType)
throws IOException {
EntityIdentifier entity = new EntityIdentifier(entityId, entityType);
// start time is not provided, so try to look it up
if (startTimeReadCache.containsKey(entity)) {
// found the start time in the cache
return startTimeReadCache.get(entity);
} else {
// try to look up the start time in the db
byte[] b = createStartTimeLookupKey(entity.getId(), entity.getType());
byte[] v = db.get(b);
if (v == null) {
// did not find the start time in the db
return null;
try {
// start time is not provided, so try to look it up
if (startTimeReadCache.containsKey(entity)) {
// found the start time in the cache
return startTimeReadCache.get(entity);
} else {
// found the start time in the db
Long l = readReverseOrderedLong(v, 0);
startTimeReadCache.put(entity, l);
return l;
// try to look up the start time in the db
byte[] b = createStartTimeLookupKey(entity.getId(), entity.getType());
byte[] v = db.get(b);
if (v == null) {
// did not find the start time in the db
return null;
} else {
// found the start time in the db
Long l = readReverseOrderedLong(v, 0);
startTimeReadCache.put(entity, l);
return l;
}
}
} catch(DBException e) {
throw new IOException(e);
}
}
@ -1152,28 +1162,32 @@ private StartAndInsertTime checkStartTimeInDb(EntityIdentifier entity,
StartAndInsertTime startAndInsertTime = null;
// create lookup key for start time
byte[] b = createStartTimeLookupKey(entity.getId(), entity.getType());
// retrieve value for key
byte[] v = db.get(b);
if (v == null) {
// start time doesn't exist in db
if (suggestedStartTime == null) {
return null;
try {
// retrieve value for key
byte[] v = db.get(b);
if (v == null) {
// start time doesn't exist in db
if (suggestedStartTime == null) {
return null;
}
startAndInsertTime = new StartAndInsertTime(suggestedStartTime,
System.currentTimeMillis());
// write suggested start time
v = new byte[16];
writeReverseOrderedLong(suggestedStartTime, v, 0);
writeReverseOrderedLong(startAndInsertTime.insertTime, v, 8);
WriteOptions writeOptions = new WriteOptions();
writeOptions.sync(true);
db.put(b, v, writeOptions);
} else {
// found start time in db, so ignore suggested start time
startAndInsertTime = new StartAndInsertTime(readReverseOrderedLong(v, 0),
readReverseOrderedLong(v, 8));
}
startAndInsertTime = new StartAndInsertTime(suggestedStartTime,
System.currentTimeMillis());
// write suggested start time
v = new byte[16];
writeReverseOrderedLong(suggestedStartTime, v, 0);
writeReverseOrderedLong(startAndInsertTime.insertTime, v, 8);
WriteOptions writeOptions = new WriteOptions();
writeOptions.sync(true);
db.put(b, v, writeOptions);
} else {
// found start time in db, so ignore suggested start time
startAndInsertTime = new StartAndInsertTime(readReverseOrderedLong(v, 0),
readReverseOrderedLong(v, 8));
}
} catch(DBException e) {
throw new IOException(e);
}
startTimeWriteCache.put(entity, startAndInsertTime);
startTimeReadCache.put(entity, startAndInsertTime.startTime);
return startAndInsertTime;
@ -1373,7 +1387,7 @@ static int getStartTimeWriteCacheSize(Configuration conf) {
@VisibleForTesting
List<String> getEntityTypes() throws IOException {
DBIterator iterator = null;
LeveldbIterator iterator = null;
try {
iterator = getDbIterator(false);
List<String> entityTypes = new ArrayList<String>();
@ -1396,6 +1410,8 @@ List<String> getEntityTypes() throws IOException {
iterator.seek(lookupKey);
}
return entityTypes;
} catch(DBException e) {
throw new IOException(e);
} finally {
IOUtils.cleanup(LOG, iterator);
}
@ -1406,7 +1422,7 @@ List<String> getEntityTypes() throws IOException {
* the given write batch.
*/
private void deleteKeysWithPrefix(WriteBatch writeBatch, byte[] prefix,
DBIterator iterator) {
LeveldbIterator iterator) {
for (iterator.seek(prefix); iterator.hasNext(); iterator.next()) {
byte[] key = iterator.peekNext().getKey();
if (!prefixMatches(prefix, prefix.length, key)) {
@ -1418,7 +1434,7 @@ private void deleteKeysWithPrefix(WriteBatch writeBatch, byte[] prefix,
@VisibleForTesting
boolean deleteNextEntity(String entityType, byte[] reverseTimestamp,
DBIterator iterator, DBIterator pfIterator, boolean seeked)
LeveldbIterator iterator, LeveldbIterator pfIterator, boolean seeked)
throws IOException {
WriteBatch writeBatch = null;
try {
@ -1524,6 +1540,8 @@ boolean deleteNextEntity(String entityType, byte[] reverseTimestamp,
writeOptions.sync(true);
db.write(writeBatch, writeOptions);
return true;
} catch(DBException e) {
throw new IOException(e);
} finally {
IOUtils.cleanup(LOG, writeBatch);
}
@ -1542,8 +1560,8 @@ void discardOldEntities(long timestamp)
try {
List<String> entityTypes = getEntityTypes();
for (String entityType : entityTypes) {
DBIterator iterator = null;
DBIterator pfIterator = null;
LeveldbIterator iterator = null;
LeveldbIterator pfIterator = null;
long typeCount = 0;
try {
deleteLock.writeLock().lock();
@ -1583,21 +1601,25 @@ void discardOldEntities(long timestamp)
}
@VisibleForTesting
DBIterator getDbIterator(boolean fillCache) {
LeveldbIterator getDbIterator(boolean fillCache) {
ReadOptions readOptions = new ReadOptions();
readOptions.fillCache(fillCache);
return db.iterator(readOptions);
return new LeveldbIterator(db, readOptions);
}
Version loadVersion() throws IOException {
byte[] data = db.get(bytes(TIMELINE_STORE_VERSION_KEY));
// if version is not stored previously, treat it as 1.0.
if (data == null || data.length == 0) {
return Version.newInstance(1, 0);
try {
byte[] data = db.get(bytes(TIMELINE_STORE_VERSION_KEY));
// if version is not stored previously, treat it as 1.0.
if (data == null || data.length == 0) {
return Version.newInstance(1, 0);
}
Version version =
new VersionPBImpl(VersionProto.parseFrom(data));
return version;
} catch(DBException e) {
throw new IOException(e);
}
Version version =
new VersionPBImpl(VersionProto.parseFrom(data));
return version;
}
// Only used for test
@ -1726,6 +1748,8 @@ public void put(TimelineDomain domain) throws IOException {
writeBatch.put(domainEntryKey, timestamps);
writeBatch.put(ownerLookupEntryKey, timestamps);
db.write(writeBatch);
} catch(DBException e) {
throw new IOException(e);
} finally {
IOUtils.cleanup(LOG, writeBatch);
}
@ -1754,13 +1778,15 @@ private static byte[] createOwnerLookupKey(
@Override
public TimelineDomain getDomain(String domainId)
throws IOException {
DBIterator iterator = null;
LeveldbIterator iterator = null;
try {
byte[] prefix = KeyBuilder.newInstance()
.add(DOMAIN_ENTRY_PREFIX).add(domainId).getBytesForLookup();
iterator = db.iterator();
iterator = new LeveldbIterator(db);
iterator.seek(prefix);
return getTimelineDomain(iterator, domainId, prefix);
} catch(DBException e) {
throw new IOException(e);
} finally {
IOUtils.cleanup(LOG, iterator);
}
@ -1769,12 +1795,12 @@ public TimelineDomain getDomain(String domainId)
@Override
public TimelineDomains getDomains(String owner)
throws IOException {
DBIterator iterator = null;
LeveldbIterator iterator = null;
try {
byte[] prefix = KeyBuilder.newInstance()
.add(OWNER_LOOKUP_PREFIX).add(owner).getBytesForLookup();
List<TimelineDomain> domains = new ArrayList<TimelineDomain>();
for (iterator = db.iterator(), iterator.seek(prefix);
for (iterator = new LeveldbIterator(db), iterator.seek(prefix);
iterator.hasNext();) {
byte[] key = iterator.peekNext().getKey();
if (!prefixMatches(prefix, prefix.length, key)) {
@ -1809,13 +1835,15 @@ public int compare(
TimelineDomains domainsToReturn = new TimelineDomains();
domainsToReturn.addDomains(domains);
return domainsToReturn;
} catch(DBException e) {
throw new IOException(e);
} finally {
IOUtils.cleanup(LOG, iterator);
}
}
private static TimelineDomain getTimelineDomain(
DBIterator iterator, String domainId, byte[] prefix) throws IOException {
LeveldbIterator iterator, String domainId, byte[] prefix) throws IOException {
// Iterate over all the rows whose key starts with prefix to retrieve the
// domain information.
TimelineDomain domain = new TimelineDomain();
@ -1852,5 +1880,5 @@ private static TimelineDomain getTimelineDomain(
} else {
return domain;
}
}
}
}

9
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/test/java/org/apache/hadoop/yarn/server/timeline/TestLeveldbTimelineStore.java
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@ -45,7 +45,8 @@
import org.apache.hadoop.yarn.server.records.Version;
import org.apache.hadoop.yarn.server.timeline.LeveldbTimelineStore;
import org.apache.hadoop.yarn.server.timeline.NameValuePair;
import org.iq80.leveldb.DBIterator;
import org.apache.hadoop.yarn.server.utils.LeveldbIterator;
import org.iq80.leveldb.DBException;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
@ -146,13 +147,15 @@ public void testCacheSizes() {
private boolean deleteNextEntity(String entityType, byte[] ts)
throws IOException, InterruptedException {
DBIterator iterator = null;
DBIterator pfIterator = null;
LeveldbIterator iterator = null;
LeveldbIterator pfIterator = null;
try {
iterator = ((LeveldbTimelineStore)store).getDbIterator(false);
pfIterator = ((LeveldbTimelineStore)store).getDbIterator(false);
return ((LeveldbTimelineStore)store).deleteNextEntity(entityType, ts,
iterator, pfIterator, false);
} catch(DBException e) {
throw new IOException(e);
} finally {
IOUtils.cleanup(null, iterator, pfIterator);
}