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[fix][broker] Avoid compaction task stuck when the last message to compact is a marker #21718

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merged 5 commits into from
Dec 20, 2023
Merged

[fix][broker] Avoid compaction task stuck when the last message to compact is a marker #21718

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b6b3ea7
Avoid compaction task stuck when the last message is marker
coderzc Dec 13, 2023
bbef1e6
Improve test
coderzc Dec 14, 2023
9b2709e
Filter all marker
coderzc Dec 18, 2023
55d929c
Address comment
coderzc Dec 19, 2023
3ce2f31
Add test & fix code
coderzc Dec 19, 2023
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19 changes: 11 additions & 8 deletions pulsar-broker/src/main/java/org/apache/pulsar/broker/service/AbstractBaseDispatcher.java
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Original file line number Diff line number Diff line change
Expand Up @@ -49,6 +49,7 @@
import org.apache.pulsar.common.api.proto.ReplicatedSubscriptionsSnapshot;
import org.apache.pulsar.common.protocol.Commands;
import org.apache.pulsar.common.protocol.Markers;
import org.apache.pulsar.compaction.Compactor;
import org.checkerframework.checker.nullness.qual.Nullable;

@Slf4j
Expand Down Expand Up @@ -174,13 +175,15 @@ public int filterEntriesForConsumer(@Nullable MessageMetadata[] metadataArray, i
if (msgMetadata != null && msgMetadata.hasTxnidMostBits()
&& msgMetadata.hasTxnidLeastBits()) {
if (Markers.isTxnMarker(msgMetadata)) {
// because consumer can receive message is smaller than maxReadPosition,
// so this marker is useless for this subscription
individualAcknowledgeMessageIfNeeded(Collections.singletonList(entry.getPosition()),
Collections.emptyMap());
entries.set(i, null);
entry.release();
continue;
if (cursor == null || !cursor.getName().equals(Compactor.COMPACTION_SUBSCRIPTION)) {
// because consumer can receive message is smaller than maxReadPosition,
// so this marker is useless for this subscription
individualAcknowledgeMessageIfNeeded(Collections.singletonList(entry.getPosition()),
Collections.emptyMap());
entries.set(i, null);
entry.release();
continue;
}
} else if (((PersistentTopic) subscription.getTopic())
.isTxnAborted(new TxnID(msgMetadata.getTxnidMostBits(), msgMetadata.getTxnidLeastBits()),
(PositionImpl) entry.getPosition())) {
Expand All @@ -192,7 +195,7 @@ public int filterEntriesForConsumer(@Nullable MessageMetadata[] metadataArray, i
}
}

if (msgMetadata == null || Markers.isServerOnlyMarker(msgMetadata)) {
if (msgMetadata == null || (Markers.isServerOnlyMarker(msgMetadata) && !Markers.isTxnMarker(msgMetadata))) {
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I think we should pass all the markers and filter them at the client side when doing compaction.

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Fixed.

PositionImpl pos = (PositionImpl) entry.getPosition();
// Message metadata was corrupted or the messages was a server-only marker

Expand Down
11 changes: 9 additions & 2 deletions pulsar-broker/src/main/java/org/apache/pulsar/compaction/TwoPhaseCompactor.java
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Original file line number Diff line number Diff line change
Expand Up @@ -45,6 +45,7 @@
import org.apache.pulsar.client.impl.RawBatchConverter;
import org.apache.pulsar.common.api.proto.MessageMetadata;
import org.apache.pulsar.common.protocol.Commands;
import org.apache.pulsar.common.protocol.Markers;
import org.apache.pulsar.common.util.FutureUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
Expand Down Expand Up @@ -130,7 +131,10 @@ private void phaseOneLoop(RawReader reader,
boolean replaceMessage = false;
mxBean.addCompactionReadOp(reader.getTopic(), m.getHeadersAndPayload().readableBytes());
MessageMetadata metadata = Commands.parseMessageMetadata(m.getHeadersAndPayload());
if (RawBatchConverter.isReadableBatch(metadata)) {
if (Markers.isTxnMarker(metadata)) {
mxBean.addCompactionRemovedEvent(reader.getTopic());
deletedMessage = true;
} else if (RawBatchConverter.isReadableBatch(metadata)) {
try {
int numMessagesInBatch = metadata.getNumMessagesInBatch();
int deleteCnt = 0;
Expand Down Expand Up @@ -262,7 +266,10 @@ private void phaseTwoLoop(RawReader reader, MessageId to, Map<String, MessageId>
MessageId id = m.getMessageId();
Optional<RawMessage> messageToAdd = Optional.empty();
mxBean.addCompactionReadOp(reader.getTopic(), m.getHeadersAndPayload().readableBytes());
if (RawBatchConverter.isReadableBatch(m)) {
MessageMetadata metadata = Commands.parseMessageMetadata(m.getHeadersAndPayload());
if (Markers.isTxnMarker(metadata)) {
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Why only check the txn marker here? Should we use Markers.isServerOnlyMarker(metadata)?

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Yes, I will fix it.

messageToAdd = Optional.empty();
} else if (RawBatchConverter.isReadableBatch(metadata)) {
try {
messageToAdd = rebatchMessage(reader.getTopic(),
m, (key, subid) -> subid.equals(latestForKey.get(key)), topicCompactionRetainNullKey);
Expand Down
59 changes: 59 additions & 0 deletions pulsar-broker/src/test/java/org/apache/pulsar/broker/transaction/TransactionTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -106,6 +106,7 @@
import org.apache.pulsar.broker.transaction.pendingack.impl.MLPendingAckStore;
import org.apache.pulsar.broker.transaction.pendingack.impl.MLPendingAckStoreProvider;
import org.apache.pulsar.broker.transaction.pendingack.impl.PendingAckHandleImpl;
import org.apache.pulsar.client.admin.LongRunningProcessStatus;
import org.apache.pulsar.client.admin.PulsarAdminException;
import org.apache.pulsar.client.api.Consumer;
import org.apache.pulsar.client.api.Message;
Expand Down Expand Up @@ -1849,4 +1850,62 @@ public void testReadCommittedWithReadCompacted() throws Exception{
Assert.assertEquals(messages, List.of("V2", "V3"));
}


@Test
public void testReadCommittedWithCompaction() throws Exception{
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Should we add a test to send a replicated subscription snapshot marker and test the compaction works?

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I add test testReplicatedSubscriptionWithCompaction, PLAT~

final String namespace = "tnx/ns-prechecks";
final String topic = "persistent://" + namespace + "/test_transaction_topic" + UUID.randomUUID();
admin.namespaces().createNamespace(namespace);
admin.topics().createNonPartitionedTopic(topic);

admin.topicPolicies().setCompactionThreshold(topic, 100 * 1024 * 1024);

@Cleanup
Producer<String> producer = this.pulsarClient.newProducer(Schema.STRING)
.topic(topic)
.create();

producer.newMessage().key("K1").value("V1").send();

Transaction txn = pulsarClient.newTransaction()
.withTransactionTimeout(1, TimeUnit.MINUTES).build().get();
producer.newMessage(txn).key("K2").value("V2").send();
producer.newMessage(txn).key("K3").value("V3").send();
txn.commit().get();

producer.newMessage().key("K1").value("V4").send();

Transaction txn2 = pulsarClient.newTransaction()
.withTransactionTimeout(1, TimeUnit.MINUTES).build().get();
producer.newMessage(txn2).key("K2").value("V5").send();
producer.newMessage(txn2).key("K3").value("V6").send();
txn2.commit().get();

admin.topics().triggerCompaction(topic);

Awaitility.await().untilAsserted(() -> {
assertEquals(admin.topics().compactionStatus(topic).status,
LongRunningProcessStatus.Status.SUCCESS);
});

@Cleanup
Consumer<String> consumer = this.pulsarClient.newConsumer(Schema.STRING)
.topic(topic)
.subscriptionName("sub")
.subscriptionType(SubscriptionType.Exclusive)
.readCompacted(true)
.subscribe();
List<String> result = new ArrayList<>();
while (true) {
Message<String> receive = consumer.receive(2, TimeUnit.SECONDS);
if (receive == null) {
break;
}

result.add(receive.getValue());
}

Assert.assertEquals(result, List.of("V4", "V5", "V6"));
}

}
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