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https://issues.apache.org/jira/browse/KAFKA-7417?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mikhail Khomenko updated KAFKA-7417:
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Affects Version/s: 1.1.1
> 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: 1.1.1, 2.0.0
> Reporter: Mikhail Khomenko
> Priority: Major
>
> 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!
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