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PartitionTest.scala
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PartitionTest.scala
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package kafka.cluster
import java.net.InetAddress
import com.yammer.metrics.core.Metric
import kafka.common.UnexpectedAppendOffsetException
import kafka.log._
import kafka.server._
import kafka.server.checkpoints.OffsetCheckpoints
import kafka.utils._
import kafka.zk.KafkaZkClient
import org.apache.kafka.common.errors.{ApiException, FencedLeaderEpochException, InconsistentTopicIdException, NotLeaderOrFollowerException, OffsetNotAvailableException, OffsetOutOfRangeException, UnknownLeaderEpochException}
import org.apache.kafka.common.message.{AlterPartitionResponseData, FetchResponseData}
import org.apache.kafka.common.message.LeaderAndIsrRequestData.LeaderAndIsrPartitionState
import org.apache.kafka.common.protocol.{ApiKeys, Errors}
import org.apache.kafka.common.record.FileRecords.TimestampAndOffset
import org.apache.kafka.common.record._
import org.apache.kafka.common.requests.{AlterPartitionResponse, FetchRequest, ListOffsetsRequest, RequestHeader}
import org.apache.kafka.common.utils.SystemTime
import org.apache.kafka.common.{InvalidRecordException, IsolationLevel, TopicPartition, Uuid}
import org.apache.kafka.metadata.LeaderRecoveryState
import org.junit.jupiter.api.Assertions._
import org.junit.jupiter.api.Test
import org.mockito.ArgumentMatchers
import org.mockito.ArgumentMatchers.{any, anyBoolean, anyInt, anyLong, anyString}
import org.mockito.Mockito._
import org.mockito.invocation.InvocationOnMock
import java.nio.ByteBuffer
import java.util.Optional
import java.util.concurrent.{CountDownLatch, Semaphore}
import kafka.server.metadata.{KRaftMetadataCache, ZkMetadataCache}
import org.apache.kafka.clients.ClientResponse
import org.apache.kafka.common.network.ListenerName
import org.apache.kafka.common.replica.ClientMetadata
import org.apache.kafka.common.replica.ClientMetadata.DefaultClientMetadata
import org.apache.kafka.common.security.auth.{KafkaPrincipal, SecurityProtocol}
import org.apache.kafka.server.common.MetadataVersion
import org.apache.kafka.server.common.MetadataVersion.IBP_2_6_IV0
import org.apache.kafka.server.metrics.KafkaYammerMetrics
import org.apache.kafka.server.util.{KafkaScheduler, MockTime}
import org.apache.kafka.storage.internals.epoch.LeaderEpochFileCache
import org.apache.kafka.storage.internals.log.{AppendOrigin, CleanerConfig, EpochEntry, FetchIsolation, FetchParams, LogAppendInfo, LogDirFailureChannel, LogOffsetMetadata, LogReadInfo, LogStartOffsetIncrementReason, ProducerStateManager, ProducerStateManagerConfig}
import org.junit.jupiter.params.ParameterizedTest
import org.junit.jupiter.params.provider.ValueSource
import scala.compat.java8.OptionConverters._
import scala.jdk.CollectionConverters._
object PartitionTest {
class MockPartitionListener extends PartitionListener {
private var highWatermark: Long = -1L
private var failed: Boolean = false
private var deleted: Boolean = false
override def onHighWatermarkUpdated(partition: TopicPartition, offset: Long): Unit = {
highWatermark = offset
}
override def onFailed(partition: TopicPartition): Unit = {
failed = true
}
override def onDeleted(partition: TopicPartition): Unit = {
deleted = true
}
private def clear(): Unit = {
highWatermark = -1L
failed = false
deleted = false
}
/**
* Verifies the callbacks that have been triggered since the last
* verification. Values different than `-1` are the ones that have
* been updated.
*/
def verify(
expectedHighWatermark: Long = -1L,
expectedFailed: Boolean = false,
expectedDeleted: Boolean = false
): Unit = {
assertEquals(expectedHighWatermark, highWatermark,
"Unexpected high watermark")
assertEquals(expectedFailed, failed,
"Unexpected failed")
assertEquals(expectedDeleted, deleted,
"Unexpected deleted")
clear()
}
}
def followerFetchParams(
replicaId: Int,
replicaEpoch: Long = 1L,
maxWaitMs: Long = 0L,
minBytes: Int = 1,
maxBytes: Int = Int.MaxValue
): FetchParams = {
new FetchParams(
ApiKeys.FETCH.latestVersion,
replicaId,
replicaEpoch,
maxWaitMs,
minBytes,
maxBytes,
FetchIsolation.LOG_END,
Optional.empty()
)
}
def consumerFetchParams(
maxWaitMs: Long = 0L,
minBytes: Int = 1,
maxBytes: Int = Int.MaxValue,
clientMetadata: Option[ClientMetadata] = None,
isolation: FetchIsolation = FetchIsolation.HIGH_WATERMARK
): FetchParams = {
new FetchParams(
ApiKeys.FETCH.latestVersion,
FetchRequest.CONSUMER_REPLICA_ID,
-1,
maxWaitMs,
minBytes,
maxBytes,
isolation,
clientMetadata.asJava
)
}
}
class PartitionTest extends AbstractPartitionTest {
import PartitionTest._
@Test
def testLastFetchedOffsetValidation(): Unit = {
val log = logManager.getOrCreateLog(topicPartition, topicId = None)
def append(leaderEpoch: Int, count: Int): Unit = {
val recordArray = (1 to count).map { i =>
new SimpleRecord(s"$i".getBytes)
}
val records = MemoryRecords.withRecords(0L, CompressionType.NONE, leaderEpoch,
recordArray: _*)
log.appendAsLeader(records, leaderEpoch = leaderEpoch)
}
append(leaderEpoch = 0, count = 2) // 0
append(leaderEpoch = 3, count = 3) // 2
append(leaderEpoch = 3, count = 3) // 5
append(leaderEpoch = 4, count = 5) // 8
append(leaderEpoch = 7, count = 1) // 13
append(leaderEpoch = 9, count = 3) // 14
assertEquals(17L, log.logEndOffset)
val leaderEpoch = 10
val logStartOffset = 0L
val partition = setupPartitionWithMocks(leaderEpoch = leaderEpoch, isLeader = true)
def epochEndOffset(epoch: Int, endOffset: Long): FetchResponseData.EpochEndOffset = {
new FetchResponseData.EpochEndOffset()
.setEpoch(epoch)
.setEndOffset(endOffset)
}
def read(lastFetchedEpoch: Int, fetchOffset: Long): LogReadInfo = {
fetchFollower(
partition,
remoteReplicaId,
fetchOffset,
logStartOffset,
leaderEpoch = Some(leaderEpoch),
lastFetchedEpoch = Some(lastFetchedEpoch)
)
}
def assertDivergence(
divergingEpoch: FetchResponseData.EpochEndOffset,
readInfo: LogReadInfo
): Unit = {
assertEquals(Optional.of(divergingEpoch), readInfo.divergingEpoch)
assertEquals(0, readInfo.fetchedData.records.sizeInBytes)
}
def assertNoDivergence(readInfo: LogReadInfo): Unit = {
assertEquals(Optional.empty(), readInfo.divergingEpoch)
}
assertDivergence(epochEndOffset(epoch = 0, endOffset = 2), read(lastFetchedEpoch = 2, fetchOffset = 5))
assertDivergence(epochEndOffset(epoch = 0, endOffset= 2), read(lastFetchedEpoch = 0, fetchOffset = 4))
assertDivergence(epochEndOffset(epoch = 4, endOffset = 13), read(lastFetchedEpoch = 6, fetchOffset = 6))
assertDivergence(epochEndOffset(epoch = 4, endOffset = 13), read(lastFetchedEpoch = 5, fetchOffset = 9))
assertDivergence(epochEndOffset(epoch = 10, endOffset = 17), read(lastFetchedEpoch = 10, fetchOffset = 18))
assertNoDivergence(read(lastFetchedEpoch = 0, fetchOffset = 2))
assertNoDivergence(read(lastFetchedEpoch = 7, fetchOffset = 14))
assertNoDivergence(read(lastFetchedEpoch = 9, fetchOffset = 17))
assertNoDivergence(read(lastFetchedEpoch = 10, fetchOffset = 17))
// Reads from epochs larger than we know about should cause an out of range error
assertThrows(classOf[OffsetOutOfRangeException], () => read(lastFetchedEpoch = 11, fetchOffset = 5))
// Move log start offset to the middle of epoch 3
log.updateHighWatermark(log.logEndOffset)
log.maybeIncrementLogStartOffset(newLogStartOffset = 5L, LogStartOffsetIncrementReason.ClientRecordDeletion)
assertDivergence(epochEndOffset(epoch = 2, endOffset = 5), read(lastFetchedEpoch = 2, fetchOffset = 8))
assertNoDivergence(read(lastFetchedEpoch = 0, fetchOffset = 5))
assertNoDivergence(read(lastFetchedEpoch = 3, fetchOffset = 5))
assertThrows(classOf[OffsetOutOfRangeException], () => read(lastFetchedEpoch = 0, fetchOffset = 0))
// Fetch offset lower than start offset should throw OffsetOutOfRangeException
log.maybeIncrementLogStartOffset(newLogStartOffset = 10, LogStartOffsetIncrementReason.ClientRecordDeletion)
assertThrows(classOf[OffsetOutOfRangeException], () => read(lastFetchedEpoch = 5, fetchOffset = 6)) // diverging
assertThrows(classOf[OffsetOutOfRangeException], () => read(lastFetchedEpoch = 3, fetchOffset = 6)) // not diverging
}
@Test
def testMakeLeaderUpdatesEpochCache(): Unit = {
val leaderEpoch = 8
val log = logManager.getOrCreateLog(topicPartition, topicId = None)
log.appendAsLeader(MemoryRecords.withRecords(0L, CompressionType.NONE, 0,
new SimpleRecord("k1".getBytes, "v1".getBytes),
new SimpleRecord("k2".getBytes, "v2".getBytes)
), leaderEpoch = 0)
log.appendAsLeader(MemoryRecords.withRecords(0L, CompressionType.NONE, 5,
new SimpleRecord("k3".getBytes, "v3".getBytes),
new SimpleRecord("k4".getBytes, "v4".getBytes)
), leaderEpoch = 5)
assertEquals(4, log.logEndOffset)
val partition = setupPartitionWithMocks(leaderEpoch = leaderEpoch, isLeader = true)
assertEquals(Some(4), partition.leaderLogIfLocal.map(_.logEndOffset))
val epochEndOffset = partition.lastOffsetForLeaderEpoch(currentLeaderEpoch = Optional.of[Integer](leaderEpoch),
leaderEpoch = leaderEpoch, fetchOnlyFromLeader = true)
assertEquals(4, epochEndOffset.endOffset)
assertEquals(leaderEpoch, epochEndOffset.leaderEpoch)
}
// Verify that partition.removeFutureLocalReplica() and partition.maybeReplaceCurrentWithFutureReplica() can run concurrently
@Test
def testMaybeReplaceCurrentWithFutureReplica(): Unit = {
val latch = new CountDownLatch(1)
logManager.maybeUpdatePreferredLogDir(topicPartition, logDir1.getAbsolutePath)
partition.createLogIfNotExists(isNew = true, isFutureReplica = false, offsetCheckpoints, None)
logManager.maybeUpdatePreferredLogDir(topicPartition, logDir2.getAbsolutePath)
partition.maybeCreateFutureReplica(logDir2.getAbsolutePath, offsetCheckpoints)
val thread1 = new Thread {
override def run(): Unit = {
latch.await()
partition.removeFutureLocalReplica()
}
}
val thread2 = new Thread {
override def run(): Unit = {
latch.await()
partition.maybeReplaceCurrentWithFutureReplica()
}
}
thread1.start()
thread2.start()
latch.countDown()
thread1.join()
thread2.join()
assertEquals(None, partition.futureLog)
}
@Test
def testReplicaFetchToFollower(): Unit = {
val controllerEpoch = 3
val followerId = brokerId + 1
val leaderId = brokerId + 2
val replicas = List[Integer](brokerId, followerId, leaderId).asJava
val isr = List[Integer](brokerId, followerId, leaderId).asJava
val leaderEpoch = 8
val partitionEpoch = 1
assertTrue(partition.makeFollower(new LeaderAndIsrPartitionState()
.setControllerEpoch(controllerEpoch)
.setLeader(leaderId)
.setLeaderEpoch(leaderEpoch)
.setIsr(isr)
.setPartitionEpoch(partitionEpoch)
.setReplicas(replicas)
.setIsNew(true),
offsetCheckpoints, None
))
def assertFetchFromReplicaFails[T <: ApiException](
expectedExceptionClass: Class[T],
leaderEpoch: Option[Int]
): Unit = {
assertThrows(expectedExceptionClass, () => {
fetchFollower(
partition,
replicaId = followerId,
fetchOffset = 0L,
leaderEpoch = leaderEpoch
)
})
}
assertFetchFromReplicaFails(classOf[NotLeaderOrFollowerException], None)
assertFetchFromReplicaFails(classOf[NotLeaderOrFollowerException], Some(leaderEpoch))
assertFetchFromReplicaFails(classOf[UnknownLeaderEpochException], Some(leaderEpoch + 1))
assertFetchFromReplicaFails(classOf[FencedLeaderEpochException], Some(leaderEpoch - 1))
}
@Test
def testFetchFromUnrecognizedFollower(): Unit = {
val controllerEpoch = 3
val leader = brokerId
val validReplica = brokerId + 1
val addingReplica1 = brokerId + 2
val addingReplica2 = brokerId + 3
val replicas = List(leader, validReplica)
val isr = List[Integer](leader, validReplica).asJava
val leaderEpoch = 8
val partitionEpoch = 1
assertTrue(partition.makeLeader(new LeaderAndIsrPartitionState()
.setControllerEpoch(controllerEpoch)
.setLeader(leader)
.setLeaderEpoch(leaderEpoch)
.setIsr(isr)
.setPartitionEpoch(partitionEpoch)
.setReplicas(replicas.map(Int.box).asJava)
.setIsNew(true),
offsetCheckpoints, None
))
assertThrows(classOf[UnknownLeaderEpochException], () => {
fetchFollower(
partition,
replicaId = addingReplica1,
fetchOffset = 0L,
leaderEpoch = Some(leaderEpoch)
)
})
assertEquals(None, partition.getReplica(addingReplica1).map(_.stateSnapshot.logEndOffset))
assertThrows(classOf[NotLeaderOrFollowerException], () => {
fetchFollower(
partition,
replicaId = addingReplica2,
fetchOffset = 0L,
leaderEpoch = None
)
})
assertEquals(None, partition.getReplica(addingReplica2).map(_.stateSnapshot.logEndOffset))
// The replicas are added as part of a reassignment
val newReplicas = List(leader, validReplica, addingReplica1, addingReplica2)
val newPartitionEpoch = partitionEpoch + 1
val addingReplicas = List(addingReplica1, addingReplica2)
assertFalse(partition.makeLeader(new LeaderAndIsrPartitionState()
.setControllerEpoch(controllerEpoch)
.setLeader(leader)
.setLeaderEpoch(leaderEpoch)
.setIsr(isr)
.setPartitionEpoch(newPartitionEpoch)
.setReplicas(newReplicas.map(Int.box).asJava)
.setAddingReplicas(addingReplicas.map(Int.box).asJava)
.setIsNew(true),
offsetCheckpoints, None
))
// Now the fetches are allowed
assertEquals(0L, fetchFollower(
partition,
replicaId = addingReplica1,
fetchOffset = 0L,
leaderEpoch = Some(leaderEpoch)
).logEndOffset)
assertEquals(Some(0L), partition.getReplica(addingReplica1).map(_.stateSnapshot.logEndOffset))
assertEquals(0L, fetchFollower(
partition,
replicaId = addingReplica2,
fetchOffset = 0L,
leaderEpoch = None
).logEndOffset)
assertEquals(Some(0L), partition.getReplica(addingReplica2).map(_.stateSnapshot.logEndOffset))
}
// Verify that partition.makeFollower() and partition.appendRecordsToFollowerOrFutureReplica() can run concurrently
@Test
def testMakeFollowerWithWithFollowerAppendRecords(): Unit = {
val appendSemaphore = new Semaphore(0)
val mockTime = new MockTime()
partition = new Partition(
topicPartition,
replicaLagTimeMaxMs = Defaults.ReplicaLagTimeMaxMs,
interBrokerProtocolVersion = MetadataVersion.latest,
localBrokerId = brokerId,
() => defaultBrokerEpoch(brokerId),
time,
alterPartitionListener,
delayedOperations,
metadataCache,
logManager,
alterPartitionManager) {
override def createLog(isNew: Boolean, isFutureReplica: Boolean, offsetCheckpoints: OffsetCheckpoints, topicId: Option[Uuid]): UnifiedLog = {
val log = super.createLog(isNew, isFutureReplica, offsetCheckpoints, None)
val logDirFailureChannel = new LogDirFailureChannel(1)
val segments = new LogSegments(log.topicPartition)
val leaderEpochCache = UnifiedLog.maybeCreateLeaderEpochCache(log.dir, log.topicPartition, logDirFailureChannel, log.config.recordVersion, "")
val maxTransactionTimeoutMs = 5 * 60 * 1000
val producerStateManagerConfig = new ProducerStateManagerConfig(kafka.server.Defaults.ProducerIdExpirationMs, true)
val producerStateManager = new ProducerStateManager(
log.topicPartition,
log.dir,
maxTransactionTimeoutMs,
producerStateManagerConfig,
mockTime
)
val offsets = new LogLoader(
log.dir,
log.topicPartition,
log.config,
mockTime.scheduler,
mockTime,
logDirFailureChannel,
hadCleanShutdown = true,
segments = segments,
logStartOffsetCheckpoint = 0L,
recoveryPointCheckpoint = 0L,
leaderEpochCache,
producerStateManager
).load()
val localLog = new LocalLog(log.dir, log.config, segments, offsets.recoveryPoint,
offsets.nextOffsetMetadata, mockTime.scheduler, mockTime, log.topicPartition,
logDirFailureChannel)
new SlowLog(log, offsets.logStartOffset, localLog, leaderEpochCache, producerStateManager, appendSemaphore)
}
}
partition.createLogIfNotExists(isNew = true, isFutureReplica = false, offsetCheckpoints, None)
val appendThread = new Thread {
override def run(): Unit = {
val records = createRecords(List(new SimpleRecord("k1".getBytes, "v1".getBytes),
new SimpleRecord("k2".getBytes, "v2".getBytes)),
baseOffset = 0)
partition.appendRecordsToFollowerOrFutureReplica(records, isFuture = false)
}
}
appendThread.start()
TestUtils.waitUntilTrue(() => appendSemaphore.hasQueuedThreads, "follower log append is not called.")
val partitionState = new LeaderAndIsrPartitionState()
.setControllerEpoch(0)
.setLeader(2)
.setLeaderEpoch(1)
.setIsr(List[Integer](0, 1, 2, brokerId).asJava)
.setPartitionEpoch(1)
.setReplicas(List[Integer](0, 1, 2, brokerId).asJava)
.setIsNew(false)
assertTrue(partition.makeFollower(partitionState, offsetCheckpoints, None))
appendSemaphore.release()
appendThread.join()
assertEquals(2L, partition.localLogOrException.logEndOffset)
assertEquals(2L, partition.leaderReplicaIdOpt.get)
}
@Test
// Verify that replacement works when the replicas have the same log end offset but different base offsets in the
// active segment
def testMaybeReplaceCurrentWithFutureReplicaDifferentBaseOffsets(): Unit = {
logManager.maybeUpdatePreferredLogDir(topicPartition, logDir1.getAbsolutePath)
partition.createLogIfNotExists(isNew = true, isFutureReplica = false, offsetCheckpoints, None)
logManager.maybeUpdatePreferredLogDir(topicPartition, logDir2.getAbsolutePath)
partition.maybeCreateFutureReplica(logDir2.getAbsolutePath, offsetCheckpoints)
// Write records with duplicate keys to current replica and roll at offset 6
val currentLog = partition.log.get
currentLog.appendAsLeader(MemoryRecords.withRecords(0L, CompressionType.NONE, 0,
new SimpleRecord("k1".getBytes, "v1".getBytes),
new SimpleRecord("k1".getBytes, "v2".getBytes),
new SimpleRecord("k1".getBytes, "v3".getBytes),
new SimpleRecord("k2".getBytes, "v4".getBytes),
new SimpleRecord("k2".getBytes, "v5".getBytes),
new SimpleRecord("k2".getBytes, "v6".getBytes)
), leaderEpoch = 0)
currentLog.roll()
currentLog.appendAsLeader(MemoryRecords.withRecords(0L, CompressionType.NONE, 0,
new SimpleRecord("k3".getBytes, "v7".getBytes),
new SimpleRecord("k4".getBytes, "v8".getBytes)
), leaderEpoch = 0)
// Write to the future replica as if the log had been compacted, and do not roll the segment
val buffer = ByteBuffer.allocate(1024)
val builder = MemoryRecords.builder(buffer, RecordBatch.CURRENT_MAGIC_VALUE, CompressionType.NONE,
TimestampType.CREATE_TIME, 0L, RecordBatch.NO_TIMESTAMP, 0)
builder.appendWithOffset(2L, new SimpleRecord("k1".getBytes, "v3".getBytes))
builder.appendWithOffset(5L, new SimpleRecord("k2".getBytes, "v6".getBytes))
builder.appendWithOffset(6L, new SimpleRecord("k3".getBytes, "v7".getBytes))
builder.appendWithOffset(7L, new SimpleRecord("k4".getBytes, "v8".getBytes))
val futureLog = partition.futureLocalLogOrException
futureLog.appendAsFollower(builder.build())
assertTrue(partition.maybeReplaceCurrentWithFutureReplica())
}
@Test
def testFetchOffsetSnapshotEpochValidationForLeader(): Unit = {
val leaderEpoch = 5
val partition = setupPartitionWithMocks(leaderEpoch, isLeader = true)
def assertSnapshotError(expectedError: Errors, currentLeaderEpoch: Optional[Integer]): Unit = {
try {
partition.fetchOffsetSnapshot(currentLeaderEpoch, fetchOnlyFromLeader = true)
assertEquals(Errors.NONE, expectedError)
} catch {
case error: ApiException => assertEquals(expectedError, Errors.forException(error))
}
}
assertSnapshotError(Errors.FENCED_LEADER_EPOCH, Optional.of(leaderEpoch - 1))
assertSnapshotError(Errors.UNKNOWN_LEADER_EPOCH, Optional.of(leaderEpoch + 1))
assertSnapshotError(Errors.NONE, Optional.of(leaderEpoch))
assertSnapshotError(Errors.NONE, Optional.empty())
}
@Test
def testFetchOffsetSnapshotEpochValidationForFollower(): Unit = {
val leaderEpoch = 5
val partition = setupPartitionWithMocks(leaderEpoch, isLeader = false)
def assertSnapshotError(expectedError: Errors,
currentLeaderEpoch: Optional[Integer],
fetchOnlyLeader: Boolean): Unit = {
try {
partition.fetchOffsetSnapshot(currentLeaderEpoch, fetchOnlyFromLeader = fetchOnlyLeader)
assertEquals(Errors.NONE, expectedError)
} catch {
case error: ApiException => assertEquals(expectedError, Errors.forException(error))
}
}
assertSnapshotError(Errors.NONE, Optional.of(leaderEpoch), fetchOnlyLeader = false)
assertSnapshotError(Errors.NONE, Optional.empty(), fetchOnlyLeader = false)
assertSnapshotError(Errors.FENCED_LEADER_EPOCH, Optional.of(leaderEpoch - 1), fetchOnlyLeader = false)
assertSnapshotError(Errors.UNKNOWN_LEADER_EPOCH, Optional.of(leaderEpoch + 1), fetchOnlyLeader = false)
assertSnapshotError(Errors.NOT_LEADER_OR_FOLLOWER, Optional.of(leaderEpoch), fetchOnlyLeader = true)
assertSnapshotError(Errors.NOT_LEADER_OR_FOLLOWER, Optional.empty(), fetchOnlyLeader = true)
assertSnapshotError(Errors.FENCED_LEADER_EPOCH, Optional.of(leaderEpoch - 1), fetchOnlyLeader = true)
assertSnapshotError(Errors.UNKNOWN_LEADER_EPOCH, Optional.of(leaderEpoch + 1), fetchOnlyLeader = true)
}
@Test
def testOffsetForLeaderEpochValidationForLeader(): Unit = {
val leaderEpoch = 5
val partition = setupPartitionWithMocks(leaderEpoch, isLeader = true)
def assertLastOffsetForLeaderError(error: Errors, currentLeaderEpochOpt: Optional[Integer]): Unit = {
val endOffset = partition.lastOffsetForLeaderEpoch(currentLeaderEpochOpt, 0,
fetchOnlyFromLeader = true)
assertEquals(error.code, endOffset.errorCode)
}
assertLastOffsetForLeaderError(Errors.NONE, Optional.empty())
assertLastOffsetForLeaderError(Errors.NONE, Optional.of(leaderEpoch))
assertLastOffsetForLeaderError(Errors.FENCED_LEADER_EPOCH, Optional.of(leaderEpoch - 1))
assertLastOffsetForLeaderError(Errors.UNKNOWN_LEADER_EPOCH, Optional.of(leaderEpoch + 1))
}
@Test
def testOffsetForLeaderEpochValidationForFollower(): Unit = {
val leaderEpoch = 5
val partition = setupPartitionWithMocks(leaderEpoch, isLeader = false)
def assertLastOffsetForLeaderError(error: Errors,
currentLeaderEpochOpt: Optional[Integer],
fetchOnlyLeader: Boolean): Unit = {
val endOffset = partition.lastOffsetForLeaderEpoch(currentLeaderEpochOpt, 0,
fetchOnlyFromLeader = fetchOnlyLeader)
assertEquals(error.code, endOffset.errorCode)
}
assertLastOffsetForLeaderError(Errors.NONE, Optional.empty(), fetchOnlyLeader = false)
assertLastOffsetForLeaderError(Errors.NONE, Optional.of(leaderEpoch), fetchOnlyLeader = false)
assertLastOffsetForLeaderError(Errors.FENCED_LEADER_EPOCH, Optional.of(leaderEpoch - 1), fetchOnlyLeader = false)
assertLastOffsetForLeaderError(Errors.UNKNOWN_LEADER_EPOCH, Optional.of(leaderEpoch + 1), fetchOnlyLeader = false)
assertLastOffsetForLeaderError(Errors.NOT_LEADER_OR_FOLLOWER, Optional.empty(), fetchOnlyLeader = true)
assertLastOffsetForLeaderError(Errors.NOT_LEADER_OR_FOLLOWER, Optional.of(leaderEpoch), fetchOnlyLeader = true)
assertLastOffsetForLeaderError(Errors.FENCED_LEADER_EPOCH, Optional.of(leaderEpoch - 1), fetchOnlyLeader = true)
assertLastOffsetForLeaderError(Errors.UNKNOWN_LEADER_EPOCH, Optional.of(leaderEpoch + 1), fetchOnlyLeader = true)
}
@Test
def testLeaderEpochValidationOnLeader(): Unit = {
val leaderEpoch = 5
val partition = setupPartitionWithMocks(leaderEpoch, isLeader = true)
def sendFetch(leaderEpoch: Option[Int]): LogReadInfo = {
fetchFollower(
partition,
remoteReplicaId,
fetchOffset = 0L,
leaderEpoch = leaderEpoch
)
}
assertEquals(0L, sendFetch(leaderEpoch = None).logEndOffset)
assertEquals(0L, sendFetch(leaderEpoch = Some(leaderEpoch)).logEndOffset)
assertThrows(classOf[FencedLeaderEpochException], () => sendFetch(Some(leaderEpoch - 1)))
assertThrows(classOf[UnknownLeaderEpochException], () => sendFetch(Some(leaderEpoch + 1)))
}
@Test
def testLeaderEpochValidationOnFollower(): Unit = {
val leaderEpoch = 5
val partition = setupPartitionWithMocks(leaderEpoch, isLeader = false)
def sendFetch(
leaderEpoch: Option[Int],
clientMetadata: Option[ClientMetadata]
): LogReadInfo = {
fetchConsumer(
partition,
fetchOffset = 0L,
leaderEpoch = leaderEpoch,
clientMetadata = clientMetadata
)
}
// Follower fetching is only allowed when the client provides metadata
assertThrows(classOf[NotLeaderOrFollowerException], () => sendFetch(None, None))
assertThrows(classOf[NotLeaderOrFollowerException], () => sendFetch(Some(leaderEpoch), None))
assertThrows(classOf[FencedLeaderEpochException], () => sendFetch(Some(leaderEpoch - 1), None))
assertThrows(classOf[UnknownLeaderEpochException], () => sendFetch(Some(leaderEpoch + 1), None))
val clientMetadata = new DefaultClientMetadata(
"rack",
"clientId",
InetAddress.getLoopbackAddress,
KafkaPrincipal.ANONYMOUS,
ListenerName.forSecurityProtocol(SecurityProtocol.PLAINTEXT).value
)
assertEquals(0L, sendFetch(leaderEpoch = None, Some(clientMetadata)).logEndOffset)
assertEquals(0L, sendFetch(leaderEpoch = Some(leaderEpoch), Some(clientMetadata)).logEndOffset)
assertThrows(classOf[FencedLeaderEpochException], () => sendFetch(Some(leaderEpoch - 1), Some(clientMetadata)))
assertThrows(classOf[UnknownLeaderEpochException], () => sendFetch(Some(leaderEpoch + 1), Some(clientMetadata)))
}
@Test
def testFetchOffsetForTimestampEpochValidationForLeader(): Unit = {
val leaderEpoch = 5
val partition = setupPartitionWithMocks(leaderEpoch, isLeader = true)
def assertFetchOffsetError(error: Errors,
currentLeaderEpochOpt: Optional[Integer]): Unit = {
try {
partition.fetchOffsetForTimestamp(0L,
isolationLevel = None,
currentLeaderEpoch = currentLeaderEpochOpt,
fetchOnlyFromLeader = true)
if (error != Errors.NONE)
fail(s"Expected readRecords to fail with error $error")
} catch {
case e: Exception =>
assertEquals(error, Errors.forException(e))
}
}
assertFetchOffsetError(Errors.NONE, Optional.empty())
assertFetchOffsetError(Errors.NONE, Optional.of(leaderEpoch))
assertFetchOffsetError(Errors.FENCED_LEADER_EPOCH, Optional.of(leaderEpoch - 1))
assertFetchOffsetError(Errors.UNKNOWN_LEADER_EPOCH, Optional.of(leaderEpoch + 1))
}
@Test
def testFetchOffsetForTimestampEpochValidationForFollower(): Unit = {
val leaderEpoch = 5
val partition = setupPartitionWithMocks(leaderEpoch, isLeader = false)
def assertFetchOffsetError(error: Errors,
currentLeaderEpochOpt: Optional[Integer],
fetchOnlyLeader: Boolean): Unit = {
try {
partition.fetchOffsetForTimestamp(0L,
isolationLevel = None,
currentLeaderEpoch = currentLeaderEpochOpt,
fetchOnlyFromLeader = fetchOnlyLeader)
if (error != Errors.NONE)
fail(s"Expected readRecords to fail with error $error")
} catch {
case e: Exception =>
assertEquals(error, Errors.forException(e))
}
}
assertFetchOffsetError(Errors.NONE, Optional.empty(), fetchOnlyLeader = false)
assertFetchOffsetError(Errors.NONE, Optional.of(leaderEpoch), fetchOnlyLeader = false)
assertFetchOffsetError(Errors.FENCED_LEADER_EPOCH, Optional.of(leaderEpoch - 1), fetchOnlyLeader = false)
assertFetchOffsetError(Errors.UNKNOWN_LEADER_EPOCH, Optional.of(leaderEpoch + 1), fetchOnlyLeader = false)
assertFetchOffsetError(Errors.NOT_LEADER_OR_FOLLOWER, Optional.empty(), fetchOnlyLeader = true)
assertFetchOffsetError(Errors.NOT_LEADER_OR_FOLLOWER, Optional.of(leaderEpoch), fetchOnlyLeader = true)
assertFetchOffsetError(Errors.FENCED_LEADER_EPOCH, Optional.of(leaderEpoch - 1), fetchOnlyLeader = true)
assertFetchOffsetError(Errors.UNKNOWN_LEADER_EPOCH, Optional.of(leaderEpoch + 1), fetchOnlyLeader = true)
}
@Test
def testFetchLatestOffsetIncludesLeaderEpoch(): Unit = {
val leaderEpoch = 5
val partition = setupPartitionWithMocks(leaderEpoch, isLeader = true)
val timestampAndOffsetOpt = partition.fetchOffsetForTimestamp(ListOffsetsRequest.LATEST_TIMESTAMP,
isolationLevel = None,
currentLeaderEpoch = Optional.empty(),
fetchOnlyFromLeader = true)
assertTrue(timestampAndOffsetOpt.isDefined)
val timestampAndOffset = timestampAndOffsetOpt.get
assertEquals(leaderEpoch, timestampAndOffset.leaderEpoch.get)
}
/**
* This test checks that after a new leader election, we don't answer any ListOffsetsRequest until
* the HW of the new leader has caught up to its startLogOffset for this epoch. From a client
* perspective this helps guarantee monotonic offsets
*
* @see <a href="https://cwiki.apache.org/confluence/display/KAFKA/KIP-207%3A+Offsets+returned+by+ListOffsetsResponse+should+be+monotonically+increasing+even+during+a+partition+leader+change">KIP-207</a>
*/
@Test
def testMonotonicOffsetsAfterLeaderChange(): Unit = {
val controllerEpoch = 3
val leader = brokerId
val follower1 = brokerId + 1
val follower2 = brokerId + 2
val replicas = List(leader, follower1, follower2)
val isr = List[Integer](leader, follower2).asJava
val leaderEpoch = 8
val batch1 = TestUtils.records(records = List(
new SimpleRecord(10, "k1".getBytes, "v1".getBytes),
new SimpleRecord(11,"k2".getBytes, "v2".getBytes)))
val batch2 = TestUtils.records(records = List(new SimpleRecord("k3".getBytes, "v1".getBytes),
new SimpleRecord(20,"k4".getBytes, "v2".getBytes),
new SimpleRecord(21,"k5".getBytes, "v3".getBytes)))
val leaderState = new LeaderAndIsrPartitionState()
.setControllerEpoch(controllerEpoch)
.setLeader(leader)
.setLeaderEpoch(leaderEpoch)
.setIsr(isr)
.setPartitionEpoch(1)
.setReplicas(replicas.map(Int.box).asJava)
.setIsNew(true)
assertTrue(partition.makeLeader(leaderState, offsetCheckpoints, None), "Expected first makeLeader() to return 'leader changed'")
assertEquals(leaderEpoch, partition.getLeaderEpoch, "Current leader epoch")
assertEquals(Set[Integer](leader, follower2), partition.partitionState.isr, "ISR")
val requestLocal = RequestLocal.withThreadConfinedCaching
// after makeLeader(() call, partition should know about all the replicas
// append records with initial leader epoch
partition.appendRecordsToLeader(batch1, origin = AppendOrigin.CLIENT, requiredAcks = 0, requestLocal)
partition.appendRecordsToLeader(batch2, origin = AppendOrigin.CLIENT, requiredAcks = 0, requestLocal)
assertEquals(partition.localLogOrException.logStartOffset, partition.localLogOrException.highWatermark,
"Expected leader's HW not move")
def fetchOffsetsForTimestamp(timestamp: Long, isolation: Option[IsolationLevel]): Either[ApiException, Option[TimestampAndOffset]] = {
try {
Right(partition.fetchOffsetForTimestamp(
timestamp = timestamp,
isolationLevel = isolation,
currentLeaderEpoch = Optional.of(partition.getLeaderEpoch),
fetchOnlyFromLeader = true
))
} catch {
case e: ApiException => Left(e)
}
}
// let the follower in ISR move leader's HW to move further but below LEO
fetchFollower(partition, replicaId = follower1, fetchOffset = 0L)
fetchFollower(partition, replicaId = follower1, fetchOffset = 2L)
fetchFollower(partition, replicaId = follower2, fetchOffset = 0L)
fetchFollower(partition, replicaId = follower2, fetchOffset = 2L)
// Simulate successful ISR update
alterPartitionManager.completeIsrUpdate(2)
// At this point, the leader has gotten 5 writes, but followers have only fetched two
assertEquals(2, partition.localLogOrException.highWatermark)
// Get the LEO
fetchOffsetsForTimestamp(ListOffsetsRequest.LATEST_TIMESTAMP, None) match {
case Right(Some(offsetAndTimestamp)) => assertEquals(5, offsetAndTimestamp.offset)
case Right(None) => fail("Should have seen some offsets")
case Left(e) => fail("Should not have seen an error")
}
// Get the HW
fetchOffsetsForTimestamp(ListOffsetsRequest.LATEST_TIMESTAMP, Some(IsolationLevel.READ_UNCOMMITTED)) match {
case Right(Some(offsetAndTimestamp)) => assertEquals(2, offsetAndTimestamp.offset)
case Right(None) => fail("Should have seen some offsets")
case Left(e) => fail("Should not have seen an error")
}
// Get a offset beyond the HW by timestamp, get a None
assertEquals(Right(None), fetchOffsetsForTimestamp(30, Some(IsolationLevel.READ_UNCOMMITTED)))
// Make into a follower
val followerState = new LeaderAndIsrPartitionState()
.setControllerEpoch(controllerEpoch)
.setLeader(follower2)
.setLeaderEpoch(leaderEpoch + 1)
.setIsr(isr)
.setPartitionEpoch(4)
.setReplicas(replicas.map(Int.box).asJava)
.setIsNew(false)
assertTrue(partition.makeFollower(followerState, offsetCheckpoints, None))
// Back to leader, this resets the startLogOffset for this epoch (to 2), we're now in the fault condition
val newLeaderState = new LeaderAndIsrPartitionState()
.setControllerEpoch(controllerEpoch)
.setLeader(leader)
.setLeaderEpoch(leaderEpoch + 2)
.setIsr(isr)
.setPartitionEpoch(5)
.setReplicas(replicas.map(Int.box).asJava)
.setIsNew(false)
assertTrue(partition.makeLeader(newLeaderState, offsetCheckpoints, None))
// Try to get offsets as a client
fetchOffsetsForTimestamp(ListOffsetsRequest.LATEST_TIMESTAMP, Some(IsolationLevel.READ_UNCOMMITTED)) match {
case Right(Some(offsetAndTimestamp)) => fail("Should have failed with OffsetNotAvailable")
case Right(None) => fail("Should have seen an error")
case Left(e: OffsetNotAvailableException) => // ok
case Left(e: ApiException) => fail(s"Expected OffsetNotAvailableException, got $e")
}
// If request is not from a client, we skip the check
fetchOffsetsForTimestamp(ListOffsetsRequest.LATEST_TIMESTAMP, None) match {
case Right(Some(offsetAndTimestamp)) => assertEquals(5, offsetAndTimestamp.offset)
case Right(None) => fail("Should have seen some offsets")
case Left(e: ApiException) => fail(s"Got ApiException $e")
}
// If we request the earliest timestamp, we skip the check
fetchOffsetsForTimestamp(ListOffsetsRequest.EARLIEST_TIMESTAMP, Some(IsolationLevel.READ_UNCOMMITTED)) match {
case Right(Some(offsetAndTimestamp)) => assertEquals(0, offsetAndTimestamp.offset)
case Right(None) => fail("Should have seen some offsets")
case Left(e: ApiException) => fail(s"Got ApiException $e")
}
// If we request the earliest local timestamp, we skip the check
fetchOffsetsForTimestamp(ListOffsetsRequest.EARLIEST_LOCAL_TIMESTAMP, Some(IsolationLevel.READ_UNCOMMITTED)) match {
case Right(Some(offsetAndTimestamp)) => assertEquals(0, offsetAndTimestamp.offset)
case Right(None) => fail("Should have seen some offsets")
case Left(e: ApiException) => fail(s"Got ApiException $e")
}
// If we request an offset by timestamp earlier than the HW, we are ok
fetchOffsetsForTimestamp(11, Some(IsolationLevel.READ_UNCOMMITTED)) match {
case Right(Some(offsetAndTimestamp)) =>
assertEquals(1, offsetAndTimestamp.offset)
assertEquals(11, offsetAndTimestamp.timestamp)
case Right(None) => fail("Should have seen some offsets")
case Left(e: ApiException) => fail(s"Got ApiException $e")
}
// Request an offset by timestamp beyond the HW, get an error now since we're in a bad state
fetchOffsetsForTimestamp(100, Some(IsolationLevel.READ_UNCOMMITTED)) match {
case Right(Some(offsetAndTimestamp)) => fail("Should have failed")
case Right(None) => fail("Should have failed")
case Left(e: OffsetNotAvailableException) => // ok
case Left(e: ApiException) => fail(s"Should have seen OffsetNotAvailableException, saw $e")
}
// Next fetch from replicas, HW is moved up to 5 (ahead of the LEO)
fetchFollower(partition, replicaId = follower1, fetchOffset = 5L)
fetchFollower(partition, replicaId = follower2, fetchOffset = 5L)
// Simulate successful ISR update
alterPartitionManager.completeIsrUpdate(6)
// Error goes away
fetchOffsetsForTimestamp(ListOffsetsRequest.LATEST_TIMESTAMP, Some(IsolationLevel.READ_UNCOMMITTED)) match {
case Right(Some(offsetAndTimestamp)) => assertEquals(5, offsetAndTimestamp.offset)
case Right(None) => fail("Should have seen some offsets")
case Left(e: ApiException) => fail(s"Got ApiException $e")
}
// Now we see None instead of an error for out of range timestamp
assertEquals(Right(None), fetchOffsetsForTimestamp(100, Some(IsolationLevel.READ_UNCOMMITTED)))
}
@Test
def testAppendRecordsAsFollowerBelowLogStartOffset(): Unit = {
partition.createLogIfNotExists(isNew = false, isFutureReplica = false, offsetCheckpoints, None)
val log = partition.localLogOrException
val initialLogStartOffset = 5L
partition.truncateFullyAndStartAt(initialLogStartOffset, isFuture = false)
assertEquals(initialLogStartOffset, log.logEndOffset,
s"Log end offset after truncate fully and start at $initialLogStartOffset:")
assertEquals(initialLogStartOffset, log.logStartOffset,
s"Log start offset after truncate fully and start at $initialLogStartOffset:")
// verify that we cannot append records that do not contain log start offset even if the log is empty
assertThrows(classOf[UnexpectedAppendOffsetException], () =>
// append one record with offset = 3
partition.appendRecordsToFollowerOrFutureReplica(createRecords(List(new SimpleRecord("k1".getBytes, "v1".getBytes)), baseOffset = 3L), isFuture = false)
)
assertEquals(initialLogStartOffset, log.logEndOffset,
s"Log end offset should not change after failure to append")
// verify that we can append records that contain log start offset, even when first
// offset < log start offset if the log is empty
val newLogStartOffset = 4L
val records = createRecords(List(new SimpleRecord("k1".getBytes, "v1".getBytes),
new SimpleRecord("k2".getBytes, "v2".getBytes),
new SimpleRecord("k3".getBytes, "v3".getBytes)),
baseOffset = newLogStartOffset)
partition.appendRecordsToFollowerOrFutureReplica(records, isFuture = false)
assertEquals(7L, log.logEndOffset, s"Log end offset after append of 3 records with base offset $newLogStartOffset:")
assertEquals(newLogStartOffset, log.logStartOffset, s"Log start offset after append of 3 records with base offset $newLogStartOffset:")
// and we can append more records after that
partition.appendRecordsToFollowerOrFutureReplica(createRecords(List(new SimpleRecord("k1".getBytes, "v1".getBytes)), baseOffset = 7L), isFuture = false)
assertEquals(8L, log.logEndOffset, s"Log end offset after append of 1 record at offset 7:")
assertEquals(newLogStartOffset, log.logStartOffset, s"Log start offset not expected to change:")
// but we cannot append to offset < log start if the log is not empty
val records2 = createRecords(List(new SimpleRecord("k1".getBytes, "v1".getBytes),
new SimpleRecord("k2".getBytes, "v2".getBytes)),
baseOffset = 3L)
assertThrows(classOf[UnexpectedAppendOffsetException], () => partition.appendRecordsToFollowerOrFutureReplica(records2, isFuture = false))
assertEquals(8L, log.logEndOffset, s"Log end offset should not change after failure to append")
// we still can append to next offset
partition.appendRecordsToFollowerOrFutureReplica(createRecords(List(new SimpleRecord("k1".getBytes, "v1".getBytes)), baseOffset = 8L), isFuture = false)
assertEquals(9L, log.logEndOffset, s"Log end offset after append of 1 record at offset 8:")
assertEquals(newLogStartOffset, log.logStartOffset, s"Log start offset not expected to change:")
}
@Test
def testListOffsetIsolationLevels(): Unit = {
val controllerEpoch = 0
val leaderEpoch = 5
val replicas = List[Integer](brokerId, brokerId + 1).asJava
val isr = replicas
partition.createLogIfNotExists(isNew = false, isFutureReplica = false, offsetCheckpoints, None)
assertTrue(partition.makeLeader(new LeaderAndIsrPartitionState()
.setControllerEpoch(controllerEpoch)
.setLeader(brokerId)
.setLeaderEpoch(leaderEpoch)
.setIsr(isr)
.setPartitionEpoch(1)
.setReplicas(replicas)
.setIsNew(true), offsetCheckpoints, None), "Expected become leader transition to succeed")
assertEquals(leaderEpoch, partition.getLeaderEpoch)
val records = createTransactionalRecords(List(
new SimpleRecord("k1".getBytes, "v1".getBytes),
new SimpleRecord("k2".getBytes, "v2".getBytes),
new SimpleRecord("k3".getBytes, "v3".getBytes)),
baseOffset = 0L,
producerId = 2L)