我几个月前在我的Kafka连锁店中创建了两个消费者组（每个组有3个消费者）：
这没有问题。
最近，我添加了第三组以将并行化添加到我的链中：
问题：新的topic3并没有真正消耗掉（很多小时后每个主题中只有20或50条消息被消耗...）=>第三组的3个分区的eahc上有巨大的“滞后”（从未消耗）。 / p>
在kafka日志中，我只能看到第三组的许多重新平衡（似乎达到5分钟默认的max.poll.interval.ms，但我不确定：未明确指定kafka消息：准备进行重新平衡组group3 ... ）。 我尝试修改轮询选项，减少 max.poll.records 的数量等。随着情况的减少，情况会有所改善，但我仍会重新平衡...我试图添加更多的CPU核心（我当时在想对许多消费者来说，这是我服务器上的CPU）从1到2，最后是4个vcore：什么都没有改变，并且htop没有显示CPU核心的巨大利用率...
我只遇到了与新的消费群体滞后/再平衡的问题，消费代码与其他消费者相同...
我不知道该怎么办...关于kafka conf，kafka CPU利用率或其他任何建议？
注意：所有堆栈都在Docker容器下
谢谢！
编辑： kafka日志的示例1（生成循环，而无需将其重置为0）：
...
[2020-07-15 10:52:32,029] INFO [GroupCoordinator 1001]: Preparing to rebalance group group3 in state PreparingRebalance with old generation 365 (__consumer_offsets-38) (reason: Adding new member kafka-python-2.0.1-319d2d85-ad11-4012-9e30-d8c94f706bbe with group instance id None) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 10:52:32,036] INFO [GroupCoordinator 1001]: Stabilized group group3 generation 366 (__consumer_offsets-38) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 10:52:32,040] INFO [GroupCoordinator 1001]: Assignment received from leader for group group3 for generation 366 (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 10:54:00,552] INFO [GroupMetadataManager brokerId=1001] Removed 0 expired offsets in 1 milliseconds. (kafka.coordinator.group.GroupMetadataManager)
[2020-07-15 10:57:32,144] INFO [GroupCoordinator 1001]: Member[group.instance.id None, member.id kafka-python-2.0.1-319d2d85-ad11-4012-9e30-d8c94f706bbe] in group group3 has left, removing it from the group (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 10:57:32,149] INFO [GroupCoordinator 1001]: Preparing to rebalance group group3 in state PreparingRebalance with old generation 366 (__consumer_offsets-38) (reason: removing member kafka-python-2.0.1-319d2d85-ad11-4012-9e30-d8c94f706bbe on LeaveGroup) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 10:57:32,157] INFO [GroupCoordinator 1001]: Group group3 with generation 367 is now empty (__consumer_offsets-38) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 11:04:00,553] INFO [GroupMetadataManager brokerId=1001] Removed 0 expired offsets in 2 milliseconds. (kafka.coordinator.group.GroupMetadataManager)
[2020-07-15 11:06:14,173] INFO [GroupCoordinator 1001]: Dynamic Member with unknown member id joins group group3 in Empty state. Created a new member id kafka-python-2.0.1-9eae5a06-c39f-4b66-b9c6-e2e520d787c1 for this member and add to the group. (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 11:06:14,182] INFO [GroupCoordinator 1001]: Preparing to rebalance group group3 in state PreparingRebalance with old generation 367 (__consumer_offsets-38) (reason: Adding new member kafka-python-2.0.1-9eae5a06-c39f-4b66-b9c6-e2e520d787c1 with group instance id None) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 11:06:14,205] INFO [GroupCoordinator 1001]: Stabilized group group3 generation 368 (__consumer_offsets-38) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 11:06:14,210] INFO [GroupCoordinator 1001]: Assignment received from leader for group group3 for generation 368 (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 11:11:14,233] INFO [GroupCoordinator 1001]: Member[group.instance.id None, member.id kafka-python-2.0.1-9eae5a06-c39f-4b66-b9c6-e2e520d787c1] in group group3 has left, removing it from the group (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 11:11:14,234] INFO [GroupCoordinator 1001]: Preparing to rebalance group group3 in state PreparingRebalance with old generation 368 (__consumer_offsets-38) (reason: removing member kafka-python-2.0.1-9eae5a06-c39f-4b66-b9c6-e2e520d787c1 on LeaveGroup) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 11:11:14,235] INFO [GroupCoordinator 1001]: Group group3 with generation 369 is now empty (__consumer_offsets-38) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 11:14:00,552] INFO [GroupMetadataManager brokerId=1001] Removed 0 expired offsets in 1 milliseconds. (kafka.coordinator.group.GroupMetadataManager)
[2020-07-15 11:15:42,480] INFO [GroupCoordinator 1001]: Dynamic Member with unknown member id joins group group3 in Empty state. Created a new member id kafka-python-2.0.1-560ebdf5-4c6f-4f12-85d5-bf6e7194b712 for this member and add to the group. (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 11:15:42,483] INFO [GroupCoordinator 1001]: Preparing to rebalance group group3 in state PreparingRebalance with old generation 369 (__consumer_offsets-38) (reason: Adding new member kafka-python-2.0.1-560ebdf5-4c6f-4f12-85d5-bf6e7194b712 with group instance id None) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 11:15:42,489] INFO [GroupCoordinator 1001]: Stabilized group group3 generation 370 (__consumer_offsets-38) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 11:15:42,505] INFO [GroupCoordinator 1001]: Assignment received from leader for group group3 for generation 370 (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 11:20:42,655] INFO [GroupCoordinator 1001]: Member[group.instance.id None, member.id kafka-python-2.0.1-560ebdf5-4c6f-4f12-85d5-bf6e7194b712] in group group3 has left, removing it from the group (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 11:20:42,657] INFO [GroupCoordinator 1001]: Preparing to rebalance group group3 in state PreparingRebalance with old generation 370 (__consumer_offsets-38) (reason: removing member kafka-python-2.0.1-560ebdf5-4c6f-4f12-85d5-bf6e7194b712 on LeaveGroup) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 11:20:42,657] INFO [GroupCoordinator 1001]: Group group3 with generation 371 is now empty (__consumer_offsets-38) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 11:24:00,552] INFO [GroupMetadataManager brokerId=1001] Removed 0 expired offsets in 1 milliseconds. (kafka.coordinator.group.GroupMetadataManager)
[2020-07-15 11:34:00,552] INFO [GroupMetadataManager brokerId=1001] Removed 0 expired offsets in 1 milliseconds. (kafka.coordinator.group.GroupMetadataManager)
[2020-07-15 11:36:26,840] INFO [GroupCoordinator 1001]: Dynamic Member with unknown member id joins group group3 in Empty state. Created a new member id kafka-python-2.0.1-6c853061-c4e8-4066-8940-2c7173709a96 for this member and add to the group. (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 11:36:26,860] INFO [GroupCoordinator 1001]: Preparing to rebalance group group3 in state PreparingRebalance with old generation 371 (__consumer_offsets-38) (reason: Adding new member kafka-python-2.0.1-6c853061-c4e8-4066-8940-2c7173709a96 with group instance id None) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 11:36:26,869] INFO [GroupCoordinator 1001]: Stabilized group group3 generation 372 (__consumer_offsets-38) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 11:36:26,879] INFO [GroupCoordinator 1001]: Assignment received from leader for group group3 for generation 372 (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 11:41:26,949] INFO [GroupCoordinator 1001]: Member[group.instance.id None, member.id kafka-python-2.0.1-6c853061-c4e8-4066-8940-2c7173709a96] in group group3 has left, removing it from the group (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 11:41:26,952] INFO [GroupCoordinator 1001]: Preparing to rebalance group group3 in state PreparingRebalance with old generation 372 (__consumer_offsets-38) (reason: removing member kafka-python-2.0.1-6c853061-c4e8-4066-8940-2c7173709a96 on LeaveGroup) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 11:41:26,953] INFO [GroupCoordinator 1001]: Group group3 with generation 373 is now empty (__consumer_offsets-38) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 11:44:00,552] INFO [GroupMetadataManager brokerId=1001] Removed 0 expired offsets in 1 milliseconds. (kafka.coordinator.group.GroupMetadataManager)
[2020-07-15 11:49:45,548] INFO [GroupCoordinator 1001]: Dynamic Member with unknown member id joins group group3 in Empty state. Created a new member id kafka-python-2.0.1-834458a8-67f7-4a0d-9056-52b6b61e79db for this member and add to the group. (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 11:49:45,576] INFO [GroupCoordinator 1001]: Preparing to rebalance group group3 in state PreparingRebalance with old generation 373 (__consumer_offsets-38) (reason: Adding new member kafka-python-2.0.1-834458a8-67f7-4a0d-9056-52b6b61e79db with group instance id None) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 11:49:45,580] INFO [GroupCoordinator 1001]: Stabilized group group3 generation 374 (__consumer_offsets-38) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 11:49:45,586] INFO [GroupCoordinator 1001]: Assignment received from leader for group group3 for generation 374 (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 11:54:00,552] INFO [GroupMetadataManager brokerId=1001] Removed 0 expired offsets in 1 milliseconds. (kafka.coordinator.group.GroupMetadataManager)
[2020-07-15 11:54:45,676] INFO [GroupCoordinator 1001]: Member[group.instance.id None, member.id kafka-python-2.0.1-834458a8-67f7-4a0d-9056-52b6b61e79db] in group group3 has left, removing it from the group (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 11:54:45,685] INFO [GroupCoordinator 1001]: Preparing to rebalance group group3 in state PreparingRebalance with old generation 374 (__consumer_offsets-38) (reason: removing member kafka-python-2.0.1-834458a8-67f7-4a0d-9056-52b6b61e79db on LeaveGroup) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 11:54:45,686] INFO [GroupCoordinator 1001]: Group group3 with generation 375 is now empty (__consumer_offsets-38) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 11:59:01,403] INFO [GroupCoordinator 1001]: Dynamic Member with unknown member id joins group group3 in Empty state. Created a new member id kafka-python-2.0.1-f8f4d080-73df-43bd-b49b-5b5403d15e00 for this member and add to the group. (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 11:59:01,432] INFO [GroupCoordinator 1001]: Preparing to rebalance group group3 in state PreparingRebalance with old generation 375 (__consumer_offsets-38) (reason: Adding new member kafka-python-2.0.1-f8f4d080-73df-43bd-b49b-5b5403d15e00 with group instance id None) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 11:59:01,471] INFO [GroupCoordinator 1001]: Stabilized group group3 generation 376 (__consumer_offsets-38) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 11:59:01,481] INFO [GroupCoordinator 1001]: Assignment received from leader for group group3 for generation 376 (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 12:04:00,552] INFO [GroupMetadataManager brokerId=1001] Removed 0 expired offsets in 1 milliseconds. (kafka.coordinator.group.GroupMetadataManager)
[2020-07-15 12:04:01,515] INFO [GroupCoordinator 1001]: Member[group.instance.id None, member.id kafka-python-2.0.1-f8f4d080-73df-43bd-b49b-5b5403d15e00] in group group3 has left, removing it from the group (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 12:04:01,518] INFO [GroupCoordinator 1001]: Preparing to rebalance group group3 in state PreparingRebalance with old generation 376 (__consumer_offsets-38) (reason: removing member kafka-python-2.0.1-f8f4d080-73df-43bd-b49b-5b5403d15e00 on LeaveGroup) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 12:04:01,519] INFO [GroupCoordinator 1001]: Group group3 with generation 377 is now empty (__consumer_offsets-38) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 12:14:00,552] INFO [GroupMetadataManager brokerId=1001] Removed 0 expired offsets in 1 milliseconds. (kafka.coordinator.group.GroupMetadataManager)
[2020-07-15 12:21:11,498] INFO [GroupCoordinator 1001]: Dynamic Member with unknown member id joins group group3 in Empty state. Created a new member id kafka-python-2.0.1-43259283-cdeb-4738-aaa4-44e83542c7dc for this member and add to the group. (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 12:21:11,502] INFO [GroupCoordinator 1001]: Preparing to rebalance group group3 in state PreparingRebalance with old generation 377 (__consumer_offsets-38) (reason: Adding new member kafka-python-2.0.1-43259283-cdeb-4738-aaa4-44e83542c7dc with group instance id None) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 12:21:11,505] INFO [GroupCoordinator 1001]: Stabilized group group3 generation 378 (__consumer_offsets-38) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 12:21:11,508] INFO [GroupCoordinator 1001]: Assignment received from leader for group group3 for generation 378 (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 12:24:00,554] INFO [GroupMetadataManager brokerId=1001] Removed 0 expired offsets in 2 milliseconds. (kafka.coordinator.group.GroupMetadataManager)
[2020-07-15 12:26:11,680] INFO [GroupCoordinator 1001]: Member[group.instance.id None, member.id kafka-python-2.0.1-43259283-cdeb-4738-aaa4-44e83542c7dc] in group group3 has left, removing it from the group (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 12:26:11,811] INFO [GroupCoordinator 1001]: Preparing to rebalance group group3 in state PreparingRebalance with old generation 378 (__consumer_offsets-38) (reason: removing member kafka-python-2.0.1-43259283-cdeb-4738-aaa4-44e83542c7dc on LeaveGroup) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 12:26:11,812] INFO [GroupCoordinator 1001]: Group group3 with generation 379 is now empty (__consumer_offsets-38) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 12:34:00,553] INFO [GroupMetadataManager brokerId=1001] Removed 0 expired offsets in 1 milliseconds. (kafka.coordinator.group.GroupMetadataManager)
[2020-07-15 12:34:30,547] INFO [GroupCoordinator 1001]: Dynamic Member with unknown member id joins group group3 in Empty state. Created a new member id kafka-python-2.0.1-0775e634-fe08-40e9-9ae3-7080ec21dd8a for this member and add to the group. (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 12:34:30,597] INFO [GroupCoordinator 1001]: Preparing to rebalance group group3 in state PreparingRebalance with old generation 379 (__consumer_offsets-38) (reason: Adding new member kafka-python-2.0.1-0775e634-fe08-40e9-9ae3-7080ec21dd8a with group instance id None) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 12:34:30,613] INFO [GroupCoordinator 1001]: Stabilized group group3 generation 380 (__consumer_offsets-38) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 12:34:30,628] INFO [GroupCoordinator 1001]: Assignment received from leader for group group3 for generation 380 (kafka.coordinator.group.GroupCoordinator)
Kafka日志的示例2（将生成的循环重置为0）：
...
[2020-07-15 12:10:02,637] INFO [GroupMetadataManager brokerId=1001] Group group3 transitioned to Dead in generation 2 (kafka.coordinator.group.GroupMetadataManager)
[2020-07-15 12:10:02,637] INFO [GroupMetadataManager brokerId=1001] Removed 0 expired offsets in 1 milliseconds. (kafka.coordinator.group.GroupMetadataManager)
[2020-07-15 12:19:22,210] INFO [GroupCoordinator 1001]: Dynamic Member with unknown member id joins group group3 in Empty state. Created a new member id kafka-python-2.0.1-4ecb3653-0db8-4233-9842-710db5270491 for this member and add to the group. (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 12:19:22,211] INFO [GroupCoordinator 1001]: Preparing to rebalance group group3 in state PreparingRebalance with old generation 0 (__consumer_offsets-38) (reason: Adding new member kafka-python-2.0.1-4ecb3653-0db8-4233-9842-710db5270491 with group instance id None) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 12:19:22,212] INFO [GroupCoordinator 1001]: Stabilized group group3 generation 1 (__consumer_offsets-38) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 12:19:22,214] INFO [GroupCoordinator 1001]: Assignment received from leader for group group3 for generation 1 (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 12:20:02,637] INFO [GroupMetadataManager brokerId=1001] Removed 0 expired offsets in 1 milliseconds. (kafka.coordinator.group.GroupMetadataManager)
[2020-07-15 12:24:22,271] INFO [GroupCoordinator 1001]: Member[group.instance.id None, member.id kafka-python-2.0.1-4ecb3653-0db8-4233-9842-710db5270491] in group group3 has left, removing it from the group (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 12:24:22,272] INFO [GroupCoordinator 1001]: Preparing to rebalance group group3 in state PreparingRebalance with old generation 1 (__consumer_offsets-38) (reason: removing member kafka-python-2.0.1-4ecb3653-0db8-4233-9842-710db5270491 on LeaveGroup) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 12:24:22,272] INFO [GroupCoordinator 1001]: Group group3 with generation 2 is now empty (__consumer_offsets-38) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 12:25:29,398] INFO [GroupCoordinator 1001]: Dynamic Member with unknown member id joins group group3 in Empty state. Created a new member id kafka-python-2.0.1-d927d9d4-1885-4430-a84b-4cc92cb7a04e for this member and add to the group. (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 12:25:29,398] INFO [GroupCoordinator 1001]: Preparing to rebalance group group3 in state PreparingRebalance with old generation 2 (__consumer_offsets-38) (reason: Adding new member kafka-python-2.0.1-d927d9d4-1885-4430-a84b-4cc92cb7a04e with group instance id None) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 12:25:29,399] INFO [GroupCoordinator 1001]: Stabilized group group3 generation 3 (__consumer_offsets-38) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 12:25:29,401] INFO [GroupCoordinator 1001]: Assignment received from leader for group group3 for generation 3 (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 12:30:02,637] INFO [GroupMetadataManager brokerId=1001] Removed 0 expired offsets in 1 milliseconds. (kafka.coordinator.group.GroupMetadataManager)
[2020-07-15 12:30:29,420] INFO [GroupCoordinator 1001]: Member[group.instance.id None, member.id kafka-python-2.0.1-d927d9d4-1885-4430-a84b-4cc92cb7a04e] in group group3 has left, removing it from the group (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 12:30:29,420] INFO [GroupCoordinator 1001]: Preparing to rebalance group group3 in state PreparingRebalance with old generation 3 (__consumer_offsets-38) (reason: removing member kafka-python-2.0.1-d927d9d4-1885-4430-a84b-4cc92cb7a04e on LeaveGroup) (kafka.coordinator.group.GroupCoordinator)
[2020-07-15 12:30:29,421] INFO [GroupCoordinator 1001]: Group group3 with generation 4 is now empty (__consumer_offsets-38) (kafka.coordinator.group.GroupCoordinator)
EDIT2：添加消费者的零件代码
self.consumer = KafkaConsumer('topic1',
bootstrap_servers=brokers_env_var,
auto_offset_reset='earliest',
enable_auto_commit=True,
session_timeout_ms=14000,
heartbeat_interval_ms=2000,
group_id='group3',
max_poll_records=100,
key_deserializer=lambda x: loads(x.decode('utf-8')),
value_deserializer=lambda x: loads(x.decode('utf-8')))
try:
for message in self.consumer:
self.consumeMessage(message.value)
except Exception as error:
print('Run error - error : ' + str(error))
答案 0 :(得分：1)
消费者组仅使用来自Kafka的消息，因此实际上您有一个生产者将消息发送到topic1，topic3和两个消费者组-一个消费是从topic1消费，第二个消费是topic3。
将相同的数据发送到多个主题没有意义，我建议您仅将这些消息发送给topic1，并使用两个使用者组：
Kafka中的不同使用者组独立管理偏移量，这就是为什么您可以为数据使用单个主题并创建多个使用者组来使用它，否则两个具有相同数据的主题将占用双倍的存储空间，并且可能会占用CPU用于管理它们。
请确保同一组中的使用者具有相同的group.id参数。
例如，有6个消费者，其中3个具有组ID g1，其他3个具有组ID g2。