客户端消费配置列表：

client.id=mam-uap-sink-client

key.deserializer=org.apache.kafka.common.serialization.StringDeserializer

value.deserializer=org.apache.kafka.common.serialization.StringDeserializer

enable.auto.commit=true

auto.offset.reset=earliest

send.buffer.bytes=131072

receive.buffer.bytes=32768

auto.commit.interval.ms=10000

heartbeat.interval.ms=6000

session.timeout.ms=60000

request.timeout.ms=80000

connections.max.idle.ms=540000

reconnect.backoff.ms=50

retry.backoff.ms=100

metadata.max.age.ms=300000

kafka客户端版本

default"/>

现在能消费到消息，就是一直重复消费，后台看到了下一直报错:

2016-07-28 05:44:53,440 ERROR [UAPEventDispatcher-consumer-starter] (org.apache.kafka.clients.consumer.internals.ConsumerCoordinator)- Error ILLEGAL_GENERATION occurred while committing offsets for group mam-uap-event-sink-1

2016-07-28 05:44:53,440 WARN  [UAPEventDispatcher-consumer-starter] (org.apache.kafka.clients.consumer.internals.ConsumerCoordinator)- Auto offset commit failed: Commit cannot be completed due to group rebalance

2016-07-28 05:44:53,477 ERROR [UAPEventDispatcher-consumer-starter] (org.apache.kafka.clients.consumer.internals.ConsumerCoordinator)- Error ILLEGAL_GENERATION occurred while committing offsets for group mam-uap-event-sink-1

2016-07-28 05:44:53,477 WARN  [UAPEventDispatcher-consumer-starter] (org.apache.kafka.clients.consumer.internals.ConsumerCoordinator)- Auto offset commit failed:

2016-07-28 05:44:53,514 INFO  [UAPEventDispatcher-consumer-starter] (org.apache.kafka.clients.consumer.internals.AbstractCoordinator)- Attempt to join group mam-uap-event-sink-1 failed due to unknown member id, resetting and retrying.

是专线nat到别人内网的kafka列表。

求助这一般是什么原因?