Kafka - 控制台消费者卡住了

Question

我用 3 个代理创建了简单的设置，然后创建了一个简单的主题并使用控制台生产者推送消息。 我尝试使用控制台消费者消费消息，所有代理都处于活动状态并正在运行，消费者被卡住了。

更新 #1

并且其中一位经纪人正在进行大量处理，但出现“NotEnoughReplicasException”等异常

日志

    org.apache.kafka.common.errors.NotEnoughReplicasException: The size of the current ISR Set(2) is insufficient to satisfy the min.isr re
quirement of 2 for partition __consumer_offsets-10                                                                                     
[2020-06-19 17:36:24,249] INFO [GroupCoordinator 2]: Preparing to rebalance group console-consumer-28937 in state PreparingRebalance wi
th old generation 4822 (__consumer_offsets-10) (reason: error when storing group assignment during SyncGroup (member: consumer-console-
[2020-06-19 17:36:24,305] INFO [GroupCoordinator 2]: Stabilized group console-consumer-28937 generation 4823 (__consumer_offsets-10) (k
afka.coordinator.group.GroupCoordinator)                                                                                               
23 (kafka.coordinator.group.GroupCoordinator)                                                                                          
[2020-06-19 17:36:24,306] ERROR [ReplicaManager broker=2] Error processing append operation on partition __consumer_offsets-10 (kafka.s
erver.ReplicaManager)                                                                                                                  
org.apache.kafka.common.errors.NotEnoughReplicasException: The size of the current ISR Set(2) is insufficient to satisfy the min.isr re
quirement of 2 for partition __consumer_offsets-10                                                                                     
[2020-06-19 17:36:24,307] INFO [GroupCoordinator 2]: Preparing to rebalance group console-consumer-28937 in state PreparingRebalance wi
th old generation 4823 (__consumer_offsets-10) (reason: error when storing group assignment during SyncGroup (member: consumer-console-
consumer-28937-1-21df21a9-3e11-4286-8252-3871633cf3bd)) (kafka.coordinator.group.GroupCoordinator)                                     
[2020-06-19 17:36:24,349] INFO [GroupCoordinator 2]: Stabilized group console-consumer-28937 generation 4824 (__consumer_offsets-10) (k
afka.coordinator.group.GroupCoordinator)                                                                                               
[2020-06-19 17:36:24,351] INFO [GroupCoordinator 2]: Assignment received from leader for group console-consumer-28937 for generation 48
[2020-06-19 17:36:24,351] ERROR [ReplicaManager broker=2] Error processing append operation on partition __consumer_offsets-10 (kafka.s

关于主题的事实

Topic: new_topic        PartitionCount: 1       ReplicationFactor: 1    Configs:
    Topic: new_topic        Partition: 0    Leader: 3       Replicas: 3     Isr: 3

Answer 1

通过使min.insync.replicas = 1 （发生问题时值为2 ）解决了该问题，因为有问题的主题new_topic只有复制因子 1 与min.insync.replicas冲突。

然而，到目前为止我还没有明白的一点是min.insync.replicas是如何干扰消费者路径的。