Mikhail Khomenko created KAFKA-7417: ---------------------------------------
Summary: Some replicas cannot become in-sync Key: KAFKA-7417 URL: https://issues.apache.org/jira/browse/KAFKA-7417 Project: Kafka Issue Type: Bug Components: replication Affects Versions: 2.0.0 Reporter: Mikhail Khomenko Hi, we have faced with the next issue - some replicas cannot become in-sync. Distribution of in-sync replicas amongst topics is random. For instance: {code:java} $ kafka-topics --zookeeper 1.2.3.4:8181 --describe --topic TEST Topic:TEST PartitionCount:8 ReplicationFactor:3 Configs: Topic: TEST Partition: 0 Leader: 2 Replicas: 0,2,1 Isr: 0,1,2 Topic: TEST Partition: 1 Leader: 1 Replicas: 1,0,2 Isr: 0,1,2 Topic: TEST Partition: 2 Leader: 2 Replicas: 2,1,0 Isr: 0,1,2 Topic: TEST Partition: 3 Leader: 2 Replicas: 0,1,2 Isr: 0,1,2 Topic: TEST Partition: 4 Leader: 1 Replicas: 1,2,0 Isr: 0,1,2 Topic: TEST Partition: 5 Leader: 2 Replicas: 2,0,1 Isr: 0,1,2 Topic: TEST Partition: 6 Leader: 0 Replicas: 0,2,1 Isr: 0,1,2 Topic: TEST Partition: 7 Leader: 0 Replicas: 1,0,2 Isr: 0,2{code} Files in segment TEST-7 are equal (the same md5sum) on all 3 brokers. Also were checked by kafka.tools.DumpLogSegments - messages are the same. We have 3-broker cluster configuration with Confluent Kafka 5.0.0 (it's Apache Kafka 2.0.0). Each broker has the next configuration: {code:java} advertised.host.name = null advertised.listeners = PLAINTEXT://1.2.3.4:9200 advertised.port = null alter.config.policy.class.name = null alter.log.dirs.replication.quota.window.num = 11 alter.log.dirs.replication.quota.window.size.seconds = 1 authorizer.class.name = auto.create.topics.enable = true auto.leader.rebalance.enable = true background.threads = 10 broker.id = 1 broker.id.generation.enable = true broker.interceptor.class = class org.apache.kafka.server.interceptor.DefaultBrokerInterceptor broker.rack = null client.quota.callback.class = null compression.type = producer connections.max.idle.ms = 600000 controlled.shutdown.enable = true controlled.shutdown.max.retries = 3 controlled.shutdown.retry.backoff.ms = 5000 controller.socket.timeout.ms = 30000 create.topic.policy.class.name = null default.replication.factor = 3 delegation.token.expiry.check.interval.ms = 3600000 delegation.token.expiry.time.ms = 86400000 delegation.token.master.key = null delegation.token.max.lifetime.ms = 604800000 delete.records.purgatory.purge.interval.requests = 1 delete.topic.enable = true fetch.purgatory.purge.interval.requests = 1000 group.initial.rebalance.delay.ms = 3000 group.max.session.timeout.ms = 300000 group.min.session.timeout.ms = 6000 host.name = inter.broker.listener.name = null inter.broker.protocol.version = 2.0 leader.imbalance.check.interval.seconds = 300 leader.imbalance.per.broker.percentage = 10 listener.security.protocol.map = PLAINTEXT:PLAINTEXT,SSL:SSL,SASL_PLAINTEXT:SASL_PLAINTEXT,SASL_SSL:SASL_SSL listeners = PLAINTEXT://0.0.0.0:9200 log.cleaner.backoff.ms = 15000 log.cleaner.dedupe.buffer.size = 134217728 log.cleaner.delete.retention.ms = 86400000 log.cleaner.enable = true log.cleaner.io.buffer.load.factor = 0.9 log.cleaner.io.buffer.size = 524288 log.cleaner.io.max.bytes.per.second = 1.7976931348623157E308 log.cleaner.min.cleanable.ratio = 0.5 log.cleaner.min.compaction.lag.ms = 0 log.cleaner.threads = 1 log.cleanup.policy = [delete] log.dir = /tmp/kafka-logs log.dirs = /var/lib/kafka/data log.flush.interval.messages = 9223372036854775807 log.flush.interval.ms = null log.flush.offset.checkpoint.interval.ms = 60000 log.flush.scheduler.interval.ms = 9223372036854775807 log.flush.start.offset.checkpoint.interval.ms = 60000 log.index.interval.bytes = 4096 log.index.size.max.bytes = 10485760 log.message.downconversion.enable = true log.message.format.version = 2.0 log.message.timestamp.difference.max.ms = 9223372036854775807 log.message.timestamp.type = CreateTime log.preallocate = false log.retention.bytes = -1 log.retention.check.interval.ms = 300000 log.retention.hours = 8760 log.retention.minutes = null log.retention.ms = null log.roll.hours = 168 log.roll.jitter.hours = 0 log.roll.jitter.ms = null log.roll.ms = null log.segment.bytes = 1073741824 log.segment.delete.delay.ms = 60000 max.connections.per.ip = 2147483647 max.connections.per.ip.overrides = max.incremental.fetch.session.cache.slots = 1000 message.max.bytes = 1000012 metric.reporters = [] metrics.num.samples = 2 metrics.recording.level = INFO metrics.sample.window.ms = 30000 min.insync.replicas = 2 num.io.threads = 8 num.network.threads = 8 num.partitions = 8 num.recovery.threads.per.data.dir = 1 num.replica.alter.log.dirs.threads = null num.replica.fetchers = 4 offset.metadata.max.bytes = 4096 offsets.commit.required.acks = -1 offsets.commit.timeout.ms = 5000 offsets.load.buffer.size = 5242880 offsets.retention.check.interval.ms = 600000 offsets.retention.minutes = 525600 offsets.topic.compression.codec = 0 offsets.topic.num.partitions = 50 offsets.topic.replication.factor = 3 offsets.topic.segment.bytes = 104857600 password.encoder.cipher.algorithm = AES/CBC/PKCS5Padding password.encoder.iterations = 4096 password.encoder.key.length = 128 password.encoder.keyfactory.algorithm = null password.encoder.old.secret = null password.encoder.secret = null port = 9092 principal.builder.class = null producer.purgatory.purge.interval.requests = 1000 queued.max.request.bytes = -1 queued.max.requests = 500 quota.consumer.default = 9223372036854775807 quota.producer.default = 9223372036854775807 quota.window.num = 11 quota.window.size.seconds = 1 replica.fetch.backoff.ms = 1000 replica.fetch.max.bytes = 1048576 replica.fetch.min.bytes = 1 replica.fetch.response.max.bytes = 10485760 replica.fetch.wait.max.ms = 5000 replica.high.watermark.checkpoint.interval.ms = 5000 replica.lag.time.max.ms = 30000 replica.socket.receive.buffer.bytes = 65536 replica.socket.timeout.ms = 30000 replication.quota.window.num = 11 replication.quota.window.size.seconds = 1 request.timeout.ms = 30000 reserved.broker.max.id = 1000 sasl.client.callback.handler.class = null sasl.enabled.mechanisms = [GSSAPI] sasl.jaas.config = null sasl.kerberos.kinit.cmd = /usr/bin/kinit sasl.kerberos.min.time.before.relogin = 60000 sasl.kerberos.principal.to.local.rules = [DEFAULT] sasl.kerberos.service.name = null sasl.kerberos.ticket.renew.jitter = 0.05 sasl.kerberos.ticket.renew.window.factor = 0.8 sasl.login.callback.handler.class = null sasl.login.class = null sasl.login.refresh.buffer.seconds = 300 sasl.login.refresh.min.period.seconds = 60 sasl.login.refresh.window.factor = 0.8 sasl.login.refresh.window.jitter = 0.05 sasl.mechanism.inter.broker.protocol = GSSAPI sasl.server.callback.handler.class = null security.inter.broker.protocol = PLAINTEXT socket.receive.buffer.bytes = 102400 socket.request.max.bytes = 104857600 socket.send.buffer.bytes = 102400 ssl.cipher.suites = [] ssl.client.auth = none ssl.enabled.protocols = [TLSv1.2, TLSv1.1, TLSv1] ssl.endpoint.identification.algorithm = https ssl.key.password = null ssl.keymanager.algorithm = SunX509 ssl.keystore.location = null ssl.keystore.password = null ssl.keystore.type = JKS ssl.protocol = TLS ssl.provider = null ssl.secure.random.implementation = null ssl.trustmanager.algorithm = PKIX ssl.truststore.location = null ssl.truststore.password = null ssl.truststore.type = JKS transaction.abort.timed.out.transaction.cleanup.interval.ms = 60000 transaction.max.timeout.ms = 900000 transaction.remove.expired.transaction.cleanup.interval.ms = 3600000 transaction.state.log.load.buffer.size = 5242880 transaction.state.log.min.isr = 2 transaction.state.log.num.partitions = 50 transaction.state.log.replication.factor = 3 transaction.state.log.segment.bytes = 104857600 transactional.id.expiration.ms = 604800000 unclean.leader.election.enable = false zookeeper.connect = 1.2.3.4:8181,1.2.3.5:8181,1.2.3.6:8181 zookeeper.connection.timeout.ms = null zookeeper.max.in.flight.requests = 10 zookeeper.session.timeout.ms = 60000 zookeeper.set.acl = false zookeeper.sync.time.ms = 2000{code} Unfortunately, cannot exactly point the moment after that this happened. Any ideas how to fix it (excluding restarts of brokers)? Many thanks in advance! -- This message was sent by Atlassian JIRA (v7.6.3#76005)