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https://issues.apache.org/jira/browse/ROCKETMQ-192?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

zhaoziyan updated ROCKETMQ-192:
-------------------------------
    Description: 
Consumer Started.
Consumer Started.
Consumer Started.
Consumer Started.
RunHello [i=0, num=281]{/192.168.185.172:10911@2=31, 
/192.168.185.172:10911@0=125, /192.168.185.172:10911@1=125}
RunHello [i=1, num=250]{/192.168.185.172:10911@2=125, 
/192.168.185.172:10911@3=125}
RunHello [i=2, num=250]{/192.168.186.131:10911@1=125, 
/192.168.186.131:10911@0=125}
RunHello [i=3, num=250]{/192.168.186.131:10911@3=125, 
/192.168.186.131:10911@2=125}
SIZE=1000
重复31

Here is my test,I send 1000 msg to the topic. 
The Test show the client may consume the same queue in some case. because of 
the current Group rebalance is doing by the consumer side,in some case , the 
consumer may have diffent view of All Consumer ids.
for Example: the consumer id 1 see have 3 consumers,but the consumer id 2 only 
see 2 consumers, so the same queue may hold by two consumer.

Kakfa 0.8.2 to 0.9 have redesign the client, move the Group rebalance to server 
side, have we need also move the Rebalance to server side ??



  was:
Consumer Started.
Consumer Started.
Consumer Started.
Consumer Started.
RunHello [i=0, num=281]{/192.168.185.172:10911@2=31, 
/192.168.185.172:10911@0=125, /192.168.185.172:10911@1=125}
RunHello [i=1, num=250]{/192.168.185.172:10911@2=125, 
/192.168.185.172:10911@3=125}
RunHello [i=2, num=250]{/192.168.186.131:10911@1=125, 
/192.168.186.131:10911@0=125}
RunHello [i=3, num=250]{/192.168.186.131:10911@3=125, 
/192.168.186.131:10911@2=125}
SIZE=1000
重复31

Here is my test,I send 1000 msg to the topic. 
The Test show the client may consume the same queue in some case. because of 
the current Group rebalance is doing by the consumer side,in some case , the 
consumer may have diffent view of All Consumer ids.
for Example: the consumer id 1 see have 3 consumers,but the consumer id 2 only 
see 2 consumers, so the same queue may hold by two consumer.

Kakfa 0.8.2 to 0.9 have redesign the client, move the Group rebalance to server 
side, have we need also move the Rebalance to server size ??




> Move consumer   group rebalance  from client  to server  ??
> -----------------------------------------------------------
>
>                 Key: ROCKETMQ-192
>                 URL: https://issues.apache.org/jira/browse/ROCKETMQ-192
>             Project: Apache RocketMQ
>          Issue Type: Improvement
>          Components: rocketmq-client
>            Reporter: zhaoziyan
>            Assignee: Xiaorui Wang
>         Attachments: TestConsumerQueue.java
>
>
> Consumer Started.
> Consumer Started.
> Consumer Started.
> Consumer Started.
> RunHello [i=0, num=281]{/192.168.185.172:10911@2=31, 
> /192.168.185.172:10911@0=125, /192.168.185.172:10911@1=125}
> RunHello [i=1, num=250]{/192.168.185.172:10911@2=125, 
> /192.168.185.172:10911@3=125}
> RunHello [i=2, num=250]{/192.168.186.131:10911@1=125, 
> /192.168.186.131:10911@0=125}
> RunHello [i=3, num=250]{/192.168.186.131:10911@3=125, 
> /192.168.186.131:10911@2=125}
> SIZE=1000
> 重复31
> Here is my test,I send 1000 msg to the topic. 
> The Test show the client may consume the same queue in some case. because of 
> the current Group rebalance is doing by the consumer side,in some case , the 
> consumer may have diffent view of All Consumer ids.
> for Example: the consumer id 1 see have 3 consumers,but the consumer id 2 
> only see 2 consumers, so the same queue may hold by two consumer.
> Kakfa 0.8.2 to 0.9 have redesign the client, move the Group rebalance to 
> server side, have we need also move the Rebalance to server side ??



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