chia7712 commented on code in PR #17914: URL: https://github.com/apache/kafka/pull/17914#discussion_r1866341433
########## core/src/test/scala/unit/kafka/server/TxnOffsetCommitRequestTest.scala: ########## @@ -0,0 +1,236 @@ +/** + * 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.server + +import org.apache.kafka.common.test.api.{ClusterConfigProperty, ClusterInstance, ClusterTest, ClusterTestDefaults, ClusterTestExtensions, Type} +import kafka.utils.TestUtils +import org.apache.kafka.common.TopicPartition +import org.apache.kafka.common.errors.UnsupportedVersionException +import org.apache.kafka.common.protocol.{ApiKeys, Errors} +import org.apache.kafka.common.requests.JoinGroupRequest +import org.apache.kafka.common.utils.ProducerIdAndEpoch +import org.apache.kafka.coordinator.group.GroupCoordinatorConfig +import org.apache.kafka.coordinator.transaction.TransactionLogConfig +import org.junit.jupiter.api.Assertions.{assertEquals, assertThrows, assertTrue, fail} +import org.junit.jupiter.api.extension.ExtendWith + +import scala.jdk.CollectionConverters.IterableHasAsScala + +@ExtendWith(value = Array(classOf[ClusterTestExtensions])) +@ClusterTestDefaults(types = Array(Type.KRAFT), serverProperties = Array( + new ClusterConfigProperty(key = GroupCoordinatorConfig.OFFSETS_TOPIC_PARTITIONS_CONFIG, value = "1"), + new ClusterConfigProperty(key = GroupCoordinatorConfig.OFFSETS_TOPIC_REPLICATION_FACTOR_CONFIG, value = "1"), + new ClusterConfigProperty(key = TransactionLogConfig.TRANSACTIONS_TOPIC_PARTITIONS_CONFIG, value = "1"), + new ClusterConfigProperty(key = TransactionLogConfig.TRANSACTIONS_TOPIC_REPLICATION_FACTOR_CONFIG, value = "1"), + ) +) +class TxnOffsetCommitRequestTest(cluster:ClusterInstance) extends GroupCoordinatorBaseRequestTest(cluster) { + + @ClusterTest + def testTxnOffsetCommitWithNewConsumerGroupProtocolAndNewGroupCoordinator(): Unit = { + testTxnOffsetCommit(true) + } + + @ClusterTest + def testTxnOffsetCommitWithOldConsumerGroupProtocolAndNewGroupCoordinator(): Unit = { + testTxnOffsetCommit(false) + } + + @ClusterTest( + serverProperties = Array( + new ClusterConfigProperty(key = GroupCoordinatorConfig.NEW_GROUP_COORDINATOR_ENABLE_CONFIG, value = "false"), + new ClusterConfigProperty(key = GroupCoordinatorConfig.GROUP_COORDINATOR_REBALANCE_PROTOCOLS_CONFIG, value = "classic"), + ) + ) + def testTxnOffsetCommitWithOldConsumerGroupProtocolAndOldGroupCoordinator(): Unit = { + testTxnOffsetCommit(false) + } + + private def testTxnOffsetCommit(useNewProtocol: Boolean): Unit = { + if (useNewProtocol && !isNewGroupCoordinatorEnabled) { + fail("Cannot use the new protocol with the old group coordinator.") + } + + val topic = "topic" + val partition = 0 + val transactionalId = "txn" + val groupId = "group" + + // Creates the __consumer_offsets and __transaction_state topics because it won't be created automatically + // in this test because it does not use FindCoordinator API. + createOffsetsTopic() + createTransactionStateTopic() + + // Join the consumer group. Note that we don't heartbeat here so we must use + // a session long enough for the duration of the test. + val (memberId: String, memberEpoch: Int) = joinConsumerGroup(groupId, useNewProtocol) + assertTrue(memberId != JoinGroupRequest.UNKNOWN_MEMBER_ID) + assertTrue(memberEpoch != JoinGroupRequest.UNKNOWN_GENERATION_ID) + + createTopic(topic, 1) + + for (version <- 0 to ApiKeys.TXN_OFFSET_COMMIT.latestVersion(isUnstableApiEnabled)) { + // Verify that the TXN_OFFSET_COMMIT request is processed correctly when member id is UNKNOWN_MEMBER_ID + // and generation id is UNKNOWN_GENERATION_ID under all api versions + verifyTxnCommitAndFetch( + topic = topic, + partition = partition, + transactionalId = transactionalId, + groupId = groupId, + memberId = JoinGroupRequest.UNKNOWN_MEMBER_ID, + generationId = JoinGroupRequest.UNKNOWN_GENERATION_ID, + offset = 100 + version, + version = version.toShort, + expectedTxnCommitError = Errors.NONE + ) + + if (version >= 3) { + // Verify that the TXN_OFFSET_COMMIT request is processed correctly when the member ID + // and generation ID are known. This validation starts from version 3, as the member ID + // must not be empty from version 3 onwards. + verifyTxnCommitAndFetch( + topic = topic, + partition = partition, + transactionalId = transactionalId, + groupId = groupId, + memberId = memberId, + generationId = memberEpoch, + offset = 200 + version, + version = version.toShort, + expectedTxnCommitError = Errors.NONE + ) + + // Verify TXN_OFFSET_COMMIT request failed with incorrect memberId + verifyTxnCommitAndFetch( + topic = topic, + partition = partition, + transactionalId = transactionalId, + groupId = groupId, + memberId = "non-exist", + generationId = memberEpoch, + offset = 200 + version, + version = version.toShort, + expectedTxnCommitError = Errors.UNKNOWN_MEMBER_ID + ) + + // Verify TXN_OFFSET_COMMIT request failed with incorrect generationId + verifyTxnCommitAndFetch( + topic = topic, + partition = partition, + transactionalId = transactionalId, + groupId = groupId, + memberId = memberId, + generationId = 100, + offset = 200 + version, + version = version.toShort, + expectedTxnCommitError = Errors.ILLEGAL_GENERATION + ) + } else { + // Verify that the TXN_OFFSET_COMMIT request failed when group metadata is set under version 3. + assertThrows(classOf[UnsupportedVersionException], () => + verifyTxnCommitAndFetch( + topic = topic, + partition = partition, + transactionalId = transactionalId, + groupId = groupId, + memberId = memberId, + generationId = memberEpoch, + offset = 200 + version, + version = version.toShort, + expectedTxnCommitError = Errors.NONE + ) + ) + } + } + } + + private def verifyTxnCommitAndFetch( + topic: String, + partition: Int, + transactionalId: String, + groupId: String, + memberId: String, + generationId: Int, + offset: Long, + version: Short, + expectedTxnCommitError: Errors + ): Unit = { + var producerIdAndEpoch: ProducerIdAndEpoch = null + // Wait until ALLOCATE_PRODUCER_ID request finished + TestUtils.waitUntilTrue(() => + try { + producerIdAndEpoch = initProducerId( + transactionalId = transactionalId, + producerIdAndEpoch = ProducerIdAndEpoch.NONE, + expectedError = Errors.NONE + ) + true + } catch { + case _: Throwable => false + }, "initProducerId request failed" + ) + + addOffsetsToTxn( + groupId = groupId, + producerId = producerIdAndEpoch.producerId, + producerEpoch = producerIdAndEpoch.epoch, + transactionalId = transactionalId + ) + + commitTxnOffset( + groupId = groupId, + memberId = memberId, + generationId = generationId, + producerId = producerIdAndEpoch.producerId, + producerEpoch = producerIdAndEpoch.epoch, + transactionalId = transactionalId, + topic = topic, + partition = partition, + offset = offset, + expectedError = expectedTxnCommitError, + version = version + ) + + endTxn( + producerId = producerIdAndEpoch.producerId, + producerEpoch = producerIdAndEpoch.epoch, + transactionalId = transactionalId, + isTransactionV2Enabled = false, + committed = true, + expectedError = Errors.NONE + ) + + if (expectedTxnCommitError != Errors.NONE) return + + TestUtils.waitUntilTrue(() => + try { + val fetchOffsetsResp = fetchOffsets( + groups = Map(groupId -> List(new TopicPartition(topic, partition))), + requireStable = true, + version = ApiKeys.OFFSET_FETCH.latestVersion + ) + val groupIdRecord = fetchOffsetsResp.find(_.groupId == groupId).head + val topicRecord = groupIdRecord.topics.asScala.find(_.name == topic).head + val partitionRecord = topicRecord.partitions.asScala.find(_.partitionIndex == partition).head + assertEquals(offset, partitionRecord.committedOffset) + true Review Comment: `offset == partitionRecord.committedOffset` ########## core/src/test/scala/unit/kafka/server/TxnOffsetCommitRequestTest.scala: ########## @@ -0,0 +1,236 @@ +/** + * 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.server + +import org.apache.kafka.common.test.api.{ClusterConfigProperty, ClusterInstance, ClusterTest, ClusterTestDefaults, ClusterTestExtensions, Type} +import kafka.utils.TestUtils +import org.apache.kafka.common.TopicPartition +import org.apache.kafka.common.errors.UnsupportedVersionException +import org.apache.kafka.common.protocol.{ApiKeys, Errors} +import org.apache.kafka.common.requests.JoinGroupRequest +import org.apache.kafka.common.utils.ProducerIdAndEpoch +import org.apache.kafka.coordinator.group.GroupCoordinatorConfig +import org.apache.kafka.coordinator.transaction.TransactionLogConfig +import org.junit.jupiter.api.Assertions.{assertEquals, assertThrows, assertTrue, fail} +import org.junit.jupiter.api.extension.ExtendWith + +import scala.jdk.CollectionConverters.IterableHasAsScala + +@ExtendWith(value = Array(classOf[ClusterTestExtensions])) +@ClusterTestDefaults(types = Array(Type.KRAFT), serverProperties = Array( + new ClusterConfigProperty(key = GroupCoordinatorConfig.OFFSETS_TOPIC_PARTITIONS_CONFIG, value = "1"), + new ClusterConfigProperty(key = GroupCoordinatorConfig.OFFSETS_TOPIC_REPLICATION_FACTOR_CONFIG, value = "1"), + new ClusterConfigProperty(key = TransactionLogConfig.TRANSACTIONS_TOPIC_PARTITIONS_CONFIG, value = "1"), + new ClusterConfigProperty(key = TransactionLogConfig.TRANSACTIONS_TOPIC_REPLICATION_FACTOR_CONFIG, value = "1"), + ) +) +class TxnOffsetCommitRequestTest(cluster:ClusterInstance) extends GroupCoordinatorBaseRequestTest(cluster) { + + @ClusterTest + def testTxnOffsetCommitWithNewConsumerGroupProtocolAndNewGroupCoordinator(): Unit = { + testTxnOffsetCommit(true) + } + + @ClusterTest + def testTxnOffsetCommitWithOldConsumerGroupProtocolAndNewGroupCoordinator(): Unit = { + testTxnOffsetCommit(false) + } + + @ClusterTest( + serverProperties = Array( + new ClusterConfigProperty(key = GroupCoordinatorConfig.NEW_GROUP_COORDINATOR_ENABLE_CONFIG, value = "false"), + new ClusterConfigProperty(key = GroupCoordinatorConfig.GROUP_COORDINATOR_REBALANCE_PROTOCOLS_CONFIG, value = "classic"), + ) + ) + def testTxnOffsetCommitWithOldConsumerGroupProtocolAndOldGroupCoordinator(): Unit = { + testTxnOffsetCommit(false) + } + + private def testTxnOffsetCommit(useNewProtocol: Boolean): Unit = { + if (useNewProtocol && !isNewGroupCoordinatorEnabled) { + fail("Cannot use the new protocol with the old group coordinator.") + } + + val topic = "topic" + val partition = 0 + val transactionalId = "txn" + val groupId = "group" + + // Creates the __consumer_offsets and __transaction_state topics because it won't be created automatically + // in this test because it does not use FindCoordinator API. + createOffsetsTopic() + createTransactionStateTopic() + + // Join the consumer group. Note that we don't heartbeat here so we must use + // a session long enough for the duration of the test. + val (memberId: String, memberEpoch: Int) = joinConsumerGroup(groupId, useNewProtocol) + assertTrue(memberId != JoinGroupRequest.UNKNOWN_MEMBER_ID) + assertTrue(memberEpoch != JoinGroupRequest.UNKNOWN_GENERATION_ID) + + createTopic(topic, 1) + + for (version <- 0 to ApiKeys.TXN_OFFSET_COMMIT.latestVersion(isUnstableApiEnabled)) { + // Verify that the TXN_OFFSET_COMMIT request is processed correctly when member id is UNKNOWN_MEMBER_ID + // and generation id is UNKNOWN_GENERATION_ID under all api versions + verifyTxnCommitAndFetch( + topic = topic, + partition = partition, + transactionalId = transactionalId, + groupId = groupId, + memberId = JoinGroupRequest.UNKNOWN_MEMBER_ID, + generationId = JoinGroupRequest.UNKNOWN_GENERATION_ID, + offset = 100 + version, + version = version.toShort, + expectedTxnCommitError = Errors.NONE + ) + + if (version >= 3) { + // Verify that the TXN_OFFSET_COMMIT request is processed correctly when the member ID + // and generation ID are known. This validation starts from version 3, as the member ID + // must not be empty from version 3 onwards. + verifyTxnCommitAndFetch( + topic = topic, + partition = partition, + transactionalId = transactionalId, + groupId = groupId, + memberId = memberId, + generationId = memberEpoch, + offset = 200 + version, + version = version.toShort, + expectedTxnCommitError = Errors.NONE + ) + + // Verify TXN_OFFSET_COMMIT request failed with incorrect memberId + verifyTxnCommitAndFetch( + topic = topic, + partition = partition, + transactionalId = transactionalId, + groupId = groupId, + memberId = "non-exist", + generationId = memberEpoch, + offset = 200 + version, + version = version.toShort, + expectedTxnCommitError = Errors.UNKNOWN_MEMBER_ID + ) + + // Verify TXN_OFFSET_COMMIT request failed with incorrect generationId + verifyTxnCommitAndFetch( + topic = topic, + partition = partition, + transactionalId = transactionalId, + groupId = groupId, + memberId = memberId, + generationId = 100, + offset = 200 + version, + version = version.toShort, + expectedTxnCommitError = Errors.ILLEGAL_GENERATION + ) + } else { + // Verify that the TXN_OFFSET_COMMIT request failed when group metadata is set under version 3. + assertThrows(classOf[UnsupportedVersionException], () => + verifyTxnCommitAndFetch( + topic = topic, + partition = partition, + transactionalId = transactionalId, + groupId = groupId, + memberId = memberId, + generationId = memberEpoch, + offset = 200 + version, + version = version.toShort, + expectedTxnCommitError = Errors.NONE + ) + ) + } + } + } + + private def verifyTxnCommitAndFetch( + topic: String, + partition: Int, + transactionalId: String, + groupId: String, + memberId: String, + generationId: Int, + offset: Long, + version: Short, + expectedTxnCommitError: Errors + ): Unit = { + var producerIdAndEpoch: ProducerIdAndEpoch = null + // Wait until ALLOCATE_PRODUCER_ID request finished Review Comment: It seems that a more accurate comment would be "Wait until the coordinator finishes loading." ########## core/src/test/scala/unit/kafka/server/TxnOffsetCommitRequestTest.scala: ########## @@ -0,0 +1,236 @@ +/** + * 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.server + +import org.apache.kafka.common.test.api.{ClusterConfigProperty, ClusterInstance, ClusterTest, ClusterTestDefaults, ClusterTestExtensions, Type} +import kafka.utils.TestUtils +import org.apache.kafka.common.TopicPartition +import org.apache.kafka.common.errors.UnsupportedVersionException +import org.apache.kafka.common.protocol.{ApiKeys, Errors} +import org.apache.kafka.common.requests.JoinGroupRequest +import org.apache.kafka.common.utils.ProducerIdAndEpoch +import org.apache.kafka.coordinator.group.GroupCoordinatorConfig +import org.apache.kafka.coordinator.transaction.TransactionLogConfig +import org.junit.jupiter.api.Assertions.{assertEquals, assertThrows, assertTrue, fail} +import org.junit.jupiter.api.extension.ExtendWith + +import scala.jdk.CollectionConverters.IterableHasAsScala + +@ExtendWith(value = Array(classOf[ClusterTestExtensions])) +@ClusterTestDefaults(types = Array(Type.KRAFT), serverProperties = Array( + new ClusterConfigProperty(key = GroupCoordinatorConfig.OFFSETS_TOPIC_PARTITIONS_CONFIG, value = "1"), + new ClusterConfigProperty(key = GroupCoordinatorConfig.OFFSETS_TOPIC_REPLICATION_FACTOR_CONFIG, value = "1"), + new ClusterConfigProperty(key = TransactionLogConfig.TRANSACTIONS_TOPIC_PARTITIONS_CONFIG, value = "1"), + new ClusterConfigProperty(key = TransactionLogConfig.TRANSACTIONS_TOPIC_REPLICATION_FACTOR_CONFIG, value = "1"), + ) +) +class TxnOffsetCommitRequestTest(cluster:ClusterInstance) extends GroupCoordinatorBaseRequestTest(cluster) { + + @ClusterTest + def testTxnOffsetCommitWithNewConsumerGroupProtocolAndNewGroupCoordinator(): Unit = { + testTxnOffsetCommit(true) + } + + @ClusterTest + def testTxnOffsetCommitWithOldConsumerGroupProtocolAndNewGroupCoordinator(): Unit = { + testTxnOffsetCommit(false) + } + + @ClusterTest( + serverProperties = Array( + new ClusterConfigProperty(key = GroupCoordinatorConfig.NEW_GROUP_COORDINATOR_ENABLE_CONFIG, value = "false"), + new ClusterConfigProperty(key = GroupCoordinatorConfig.GROUP_COORDINATOR_REBALANCE_PROTOCOLS_CONFIG, value = "classic"), + ) + ) + def testTxnOffsetCommitWithOldConsumerGroupProtocolAndOldGroupCoordinator(): Unit = { + testTxnOffsetCommit(false) + } + + private def testTxnOffsetCommit(useNewProtocol: Boolean): Unit = { + if (useNewProtocol && !isNewGroupCoordinatorEnabled) { + fail("Cannot use the new protocol with the old group coordinator.") + } + + val topic = "topic" + val partition = 0 + val transactionalId = "txn" + val groupId = "group" + + // Creates the __consumer_offsets and __transaction_state topics because it won't be created automatically + // in this test because it does not use FindCoordinator API. + createOffsetsTopic() + createTransactionStateTopic() + + // Join the consumer group. Note that we don't heartbeat here so we must use + // a session long enough for the duration of the test. + val (memberId: String, memberEpoch: Int) = joinConsumerGroup(groupId, useNewProtocol) + assertTrue(memberId != JoinGroupRequest.UNKNOWN_MEMBER_ID) + assertTrue(memberEpoch != JoinGroupRequest.UNKNOWN_GENERATION_ID) + + createTopic(topic, 1) + + for (version <- 0 to ApiKeys.TXN_OFFSET_COMMIT.latestVersion(isUnstableApiEnabled)) { + // Verify that the TXN_OFFSET_COMMIT request is processed correctly when member id is UNKNOWN_MEMBER_ID + // and generation id is UNKNOWN_GENERATION_ID under all api versions + verifyTxnCommitAndFetch( + topic = topic, + partition = partition, + transactionalId = transactionalId, + groupId = groupId, + memberId = JoinGroupRequest.UNKNOWN_MEMBER_ID, + generationId = JoinGroupRequest.UNKNOWN_GENERATION_ID, + offset = 100 + version, + version = version.toShort, + expectedTxnCommitError = Errors.NONE + ) + + if (version >= 3) { + // Verify that the TXN_OFFSET_COMMIT request is processed correctly when the member ID + // and generation ID are known. This validation starts from version 3, as the member ID + // must not be empty from version 3 onwards. + verifyTxnCommitAndFetch( + topic = topic, + partition = partition, + transactionalId = transactionalId, + groupId = groupId, + memberId = memberId, + generationId = memberEpoch, + offset = 200 + version, + version = version.toShort, + expectedTxnCommitError = Errors.NONE + ) + + // Verify TXN_OFFSET_COMMIT request failed with incorrect memberId + verifyTxnCommitAndFetch( + topic = topic, + partition = partition, + transactionalId = transactionalId, + groupId = groupId, + memberId = "non-exist", + generationId = memberEpoch, + offset = 200 + version, + version = version.toShort, + expectedTxnCommitError = Errors.UNKNOWN_MEMBER_ID + ) + + // Verify TXN_OFFSET_COMMIT request failed with incorrect generationId + verifyTxnCommitAndFetch( + topic = topic, + partition = partition, + transactionalId = transactionalId, + groupId = groupId, + memberId = memberId, + generationId = 100, + offset = 200 + version, + version = version.toShort, + expectedTxnCommitError = Errors.ILLEGAL_GENERATION + ) + } else { + // Verify that the TXN_OFFSET_COMMIT request failed when group metadata is set under version 3. + assertThrows(classOf[UnsupportedVersionException], () => + verifyTxnCommitAndFetch( + topic = topic, + partition = partition, + transactionalId = transactionalId, + groupId = groupId, + memberId = memberId, + generationId = memberEpoch, + offset = 200 + version, + version = version.toShort, + expectedTxnCommitError = Errors.NONE + ) + ) + } + } + } + + private def verifyTxnCommitAndFetch( + topic: String, + partition: Int, + transactionalId: String, + groupId: String, + memberId: String, + generationId: Int, + offset: Long, + version: Short, + expectedTxnCommitError: Errors + ): Unit = { + var producerIdAndEpoch: ProducerIdAndEpoch = null + // Wait until ALLOCATE_PRODUCER_ID request finished + TestUtils.waitUntilTrue(() => + try { + producerIdAndEpoch = initProducerId( + transactionalId = transactionalId, + producerIdAndEpoch = ProducerIdAndEpoch.NONE, + expectedError = Errors.NONE + ) + true + } catch { + case _: Throwable => false + }, "initProducerId request failed" + ) + + addOffsetsToTxn( + groupId = groupId, + producerId = producerIdAndEpoch.producerId, + producerEpoch = producerIdAndEpoch.epoch, + transactionalId = transactionalId + ) + + commitTxnOffset( + groupId = groupId, + memberId = memberId, + generationId = generationId, + producerId = producerIdAndEpoch.producerId, + producerEpoch = producerIdAndEpoch.epoch, + transactionalId = transactionalId, + topic = topic, + partition = partition, + offset = offset, + expectedError = expectedTxnCommitError, + version = version + ) + + endTxn( + producerId = producerIdAndEpoch.producerId, + producerEpoch = producerIdAndEpoch.epoch, + transactionalId = transactionalId, + isTransactionV2Enabled = false, + committed = true, + expectedError = Errors.NONE + ) + + if (expectedTxnCommitError != Errors.NONE) return Review Comment: Could you please confirm that committed offsets remain unchanged after a failed `TXN_OFFSET_COMMIT`? -- This is an automated message from the Apache Git Service. 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