Hi Guozhang,
At first, thank you answer my question, and give me some suggest.But, I'm sure 
I readed some introduction about kafka.
In my producer, My Code is( c code):res = rd_kafka_conf_set(kafka_conf, 
"request.required.acks", "-1", NULL, 0);res = rd_kafka_topic_conf_set( 
topic_conf, "produce.offset.report", "true", errstr, sizeof(errstr) );
In my consumer, My Code is(kafka-python):
                self.__consumer = KafkaConsumer( 
bootstrap_servers=self.__kafka_config["hosts"],                                 
           group_id=self.__kafka_config["group"],                               
             auto_offset_reset="earliest",                                      
      )                
self.__consumer.subscribe([self.__kafka_config["data_topic"]])
                for message in self.__consumer:

I think these codes is common, What's your suggest about these codes?
In the end, I must explain: Lost message is not often, some time, couple days 
can find one or two lost messages.But some day, maybe can find over 20 messages 
were losted.Our message over 1,200,000 in one day.  
So, do your have any suggest?Bye the way, can you speak Chinese? Thank you very 
much & Best wishesJerry

--------------------------------


----- 原始邮件 -----
发件人:Guozhang Wang <wangg...@gmail.com>
收件人:"users@kafka.apache.org" <users@kafka.apache.org>, yangy...@sina.com
主题:Re: I found kafka lsot message
日期:2016年10月10日 01点25分

Jerry,
Message lost scenarios usually are due to producer and consumer mis-configured. 
Have you read about the client configs web docs?
http://kafka.apache.org/documentation#producerconfigs

http://kafka.apache.org/documentation#newconsumerconfigs


If not I'd suggest you reading those first and see if you can tune some of 
these configs to have better delivery guarantees.
Guozhang

On Fri, Oct 7, 2016 at 9:48 PM,  <yangy...@sina.com> wrote:
Hello every body,I build a kafka cluster(include 5 domains) use 
kafka_2.11-0.10.0.0 and kafka-python-1.3.1.I create a topic by 100 partitions 
and 2 replicate, then use 20 consumers to receive message.

But, I found sometime the kafka lost message! I found some partition's offsite 
lost at consumer.After, I make a global index for every message from producer 
for confirm this problem, and I also found the global index had been break!

Why the kafka lost message?  What can I do to fix the problem?

Thanks!Jerry



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-- 
-- Guozhang



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