我们在测试计算机上运行一个ZooKeeper服务器和一个Kafka代理。我们使用的是ZooKeeper 3.3.5和Kafka 0.9.0.1。
代理上的邮件保留期限设置为4小时：
log.retention.ms = null
log.retention.bytes = -1
log.retention.hours = 4
log.retention.minutes = null
log.retention.check.interval.ms = 30000
我们有一个主题，其保留期基本上是无限的（我们将其设置为50年）。
在某些时候我们关闭然后重新启动ZooKeeper，然后我们关闭并重新启动Kafka经纪人。
查看日志，看起来Kafka经纪人在启动时决定删除旧邮件，即使它们在50年的保留期内也是如此。
首先，这是Kafka正常启动：
[2016-09-15 09:09:24,877] INFO starting (kafka.server.KafkaServer)
[2016-09-15 09:09:24,883] INFO Connecting to zookeeper on 10.0.4.83:2182 (kafka.server.KafkaServer)
[2016-09-15 09:09:25,056] INFO Loading logs. (kafka.log.LogManager)
[2016-09-15 09:09:25,096] INFO Completed load of log ecosystem_sharedmodel-0 with log end offset 102152 (kafka.log.Log)
[2016-09-15 09:09:25,105] INFO Logs loading complete. (kafka.log.LogManager)
[2016-09-15 09:09:25,106] INFO Starting log cleanup with a period of 30000 ms. (kafka.log.LogManager)
[2016-09-15 09:09:25,107] INFO Starting log flusher with a default period of 9223372036854775807 ms. (kafka.log.LogManager)
[2016-09-15 09:09:25,149] INFO Awaiting socket connections on ip-10-0-4-83:9092. (kafka.network.Acceptor)
[2016-09-15 09:09:25,151] INFO [Socket Server on Broker 1], Started 1 acceptor threads (kafka.network.SocketServer)
[2016-09-15 09:09:25,169] INFO [ExpirationReaper-1], Starting (kafka.server.DelayedOperationPurgatory$ExpiredOperationReaper)
[2016-09-15 09:09:25,173] INFO [ExpirationReaper-1], Starting (kafka.server.DelayedOperationPurgatory$ExpiredOperationReaper)
[2016-09-15 09:09:25,244] INFO Creating /controller (is it secure? false) (kafka.utils.ZKCheckedEphemeral)
[2016-09-15 09:09:25,250] INFO Result of znode creation is: OK (kafka.utils.ZKCheckedEphemeral)
[2016-09-15 09:09:25,250] INFO 1 successfully elected as leader (kafka.server.ZookeeperLeaderElector)
[2016-09-15 09:09:25,321] INFO [GroupCoordinator 1]: Starting up. (kafka.coordinator.GroupCoordinator)
然后，30秒后，日志清理开始并删除我们的所有消息：
[2016-09-15 09:09:55,114] INFO Rolled new log segment for 'ecosystem_sharedmodel-0' in 3 ms. (kafka.log.Log)
[2016-09-15 09:09:55,115] INFO Scheduling log segment 0 for log ecosystem_sharedmodel-0 for deletion. (kafka.log.Log)
[2016-09-15 09:09:55,115] INFO Scheduling log segment 618 for log ecosystem_sharedmodel-0 for deletion. (kafka.log.Log)
[2016-09-15 09:09:55,115] INFO Scheduling log segment 3052 for log ecosystem_sharedmodel-0 for deletion. (kafka.log.Log)
[2016-09-15 09:09:55,116] INFO Scheduling log segment 6050 for log ecosystem_sharedmodel-0 for deletion. (kafka.log.Log)
[2016-09-15 09:09:55,116] INFO Scheduling log segment 73419 for log ecosystem_sharedmodel-0 for deletion. (kafka.log.Log)
[2016-09-15 09:09:55,116] INFO Scheduling log segment 73553 for log ecosystem_sharedmodel-0 for deletion. (kafka.log.Log)
[2016-09-15 09:09:55,116] INFO Scheduling log segment 82663 for log ecosystem_sharedmodel-0 for deletion. (kafka.log.Log)
[2016-09-15 09:09:55,117] INFO Scheduling log segment 85600 for log ecosystem_sharedmodel-0 for deletion. (kafka.log.Log)
[2016-09-15 09:09:55,117] INFO Scheduling log segment 96316 for log ecosystem_sharedmodel-0 for deletion. (kafka.log.Log)
[2016-09-15 09:09:55,117] INFO Scheduling log segment 99030 for log ecosystem_sharedmodel-0 for deletion. (kafka.log.Log)
[2016-09-15 09:09:55,117] INFO Scheduling log segment 101756 for log ecosystem_sharedmodel-0 for deletion. (kafka.log.Log)
[2016-09-15 09:10:55,116] INFO Deleting segment 618 from log ecosystem_sharedmodel-0. (kafka.log.Log)
[2016-09-15 09:10:55,116] INFO Deleting segment 0 from log ecosystem_sharedmodel-0. (kafka.log.Log)
[2016-09-15 09:10:55,116] INFO Deleting segment 6050 from log ecosystem_sharedmodel-0. (kafka.log.Log)
[2016-09-15 09:10:55,117] INFO Deleting segment 73419 from log ecosystem_sharedmodel-0. (kafka.log.Log)
[2016-09-15 09:10:55,117] INFO Deleting segment 3052 from log ecosystem_sharedmodel-0. (kafka.log.Log)
[2016-09-15 09:10:55,117] INFO Deleting index /data/kafka/ecosystem_sharedmodel-0/00000000000000073419.index.deleted (kafka.log.OffsetIndex)
[2016-09-15 09:10:55,117] INFO Deleting segment 73553 from log ecosystem_sharedmodel-0. (kafka.log.Log)
[2016-09-15 09:10:55,117] INFO Deleting index /data/kafka/ecosystem_sharedmodel-0/00000000000000003052.index.deleted (kafka.log.OffsetIndex)
[2016-09-15 09:10:55,118] INFO Deleting segment 82663 from log ecosystem_sharedmodel-0. (kafka.log.Log)
[2016-09-15 09:10:55,118] INFO Deleting index /data/kafka/ecosystem_sharedmodel-0/00000000000000073553.index.deleted (kafka.log.OffsetIndex)
[2016-09-15 09:10:55,118] INFO Deleting segment 85600 from log ecosystem_sharedmodel-0. (kafka.log.Log)
[2016-09-15 09:10:55,118] INFO Deleting index /data/kafka/ecosystem_sharedmodel-0/00000000000000082663.index.deleted (kafka.log.OffsetIndex)
[2016-09-15 09:10:55,119] INFO Deleting segment 96316 from log ecosystem_sharedmodel-0. (kafka.log.Log)
[2016-09-15 09:10:55,119] INFO Deleting index /data/kafka/ecosystem_sharedmodel-0/00000000000000085600.index.deleted (kafka.log.OffsetIndex)
[2016-09-15 09:10:55,119] INFO Deleting index /data/kafka/ecosystem_sharedmodel-0/00000000000000096316.index.deleted (kafka.log.OffsetIndex)
[2016-09-15 09:10:55,119] INFO Deleting segment 99030 from log ecosystem_sharedmodel-0. (kafka.log.Log)
[2016-09-15 09:10:55,119] INFO Deleting segment 101756 from log ecosystem_sharedmodel-0. (kafka.log.Log)
[2016-09-15 09:10:55,120] INFO Deleting index /data/kafka/ecosystem_sharedmodel-0/00000000000000000000.index.deleted (kafka.log.OffsetIndex)
[2016-09-15 09:10:55,121] INFO Deleting index /data/kafka/ecosystem_sharedmodel-0/00000000000000099030.index.deleted (kafka.log.OffsetIndex)
[2016-09-15 09:10:55,121] INFO Deleting index /data/kafka/ecosystem_sharedmodel-0/00000000000000000618.index.deleted (kafka.log.OffsetIndex)
[2016-09-15 09:10:55,121] INFO Deleting index /data/kafka/ecosystem_sharedmodel-0/00000000000000101756.index.deleted (kafka.log.OffsetIndex)
[2016-09-15 09:10:55,123] INFO Deleting index /data/kafka/ecosystem_sharedmodel-0/00000000000000006050.index.deleted (kafka.log.OffsetIndex)
这是卡夫卡的预期行为吗？我们这边有误会吗？配置问题？
编辑：结果是用户错误，卡夫卡方面没有错误。